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        module.exports = factory();
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        define([], factory);
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        exports["SentenTree"] = factory();
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        root["SentenTree"] = factory();
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        ([
            /* 0 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__select__ = __webpack_require__(105);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__selectAll__ = __webpack_require__(106);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__filter__ = __webpack_require__(94);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_3__data__ = __webpack_require__(88);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_4__enter__ = __webpack_require__(38);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_5__exit__ = __webpack_require__(93);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_6__merge__ = __webpack_require__(98);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_7__order__ = __webpack_require__(101);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_8__sort__ = __webpack_require__(108);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_9__call__ = __webpack_require__(86);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_10__nodes__ = __webpack_require__(100);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_11__node__ = __webpack_require__(99);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_12__size__ = __webpack_require__(107);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_13__empty__ = __webpack_require__(92);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_14__each__ = __webpack_require__(91);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_15__attr__ = __webpack_require__(85);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_16__style__ = __webpack_require__(109);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_17__property__ = __webpack_require__(102);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_18__classed__ = __webpack_require__(87);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_19__text__ = __webpack_require__(110);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_20__html__ = __webpack_require__(95);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_21__raise__ = __webpack_require__(103);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_22__lower__ = __webpack_require__(97);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_23__append__ = __webpack_require__(84);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_24__insert__ = __webpack_require__(96);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_25__remove__ = __webpack_require__(104);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_26__datum__ = __webpack_require__(89);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_27__on__ = __webpack_require__(18);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_28__dispatch__ = __webpack_require__(90);
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "c", function() { return root; });
                /* harmony export (immutable) */
                __webpack_exports__["b"] = Selection;






























                var root = [null];

                function Selection(groups, parents) {
                    this._groups = groups;
                    this._parents = parents;
                }

                function selection() {
                    return new Selection([
                        [document.documentElement]
                    ], root);
                }

                Selection.prototype = selection.prototype = {
                    constructor: Selection,
                    select: __WEBPACK_IMPORTED_MODULE_0__select__["a" /* default */ ],
                    selectAll: __WEBPACK_IMPORTED_MODULE_1__selectAll__["a" /* default */ ],
                    filter: __WEBPACK_IMPORTED_MODULE_2__filter__["a" /* default */ ],
                    data: __WEBPACK_IMPORTED_MODULE_3__data__["a" /* default */ ],
                    enter: __WEBPACK_IMPORTED_MODULE_4__enter__["a" /* default */ ],
                    exit: __WEBPACK_IMPORTED_MODULE_5__exit__["a" /* default */ ],
                    merge: __WEBPACK_IMPORTED_MODULE_6__merge__["a" /* default */ ],
                    order: __WEBPACK_IMPORTED_MODULE_7__order__["a" /* default */ ],
                    sort: __WEBPACK_IMPORTED_MODULE_8__sort__["a" /* default */ ],
                    call: __WEBPACK_IMPORTED_MODULE_9__call__["a" /* default */ ],
                    nodes: __WEBPACK_IMPORTED_MODULE_10__nodes__["a" /* default */ ],
                    node: __WEBPACK_IMPORTED_MODULE_11__node__["a" /* default */ ],
                    size: __WEBPACK_IMPORTED_MODULE_12__size__["a" /* default */ ],
                    empty: __WEBPACK_IMPORTED_MODULE_13__empty__["a" /* default */ ],
                    each: __WEBPACK_IMPORTED_MODULE_14__each__["a" /* default */ ],
                    attr: __WEBPACK_IMPORTED_MODULE_15__attr__["a" /* default */ ],
                    style: __WEBPACK_IMPORTED_MODULE_16__style__["a" /* default */ ],
                    property: __WEBPACK_IMPORTED_MODULE_17__property__["a" /* default */ ],
                    classed: __WEBPACK_IMPORTED_MODULE_18__classed__["a" /* default */ ],
                    text: __WEBPACK_IMPORTED_MODULE_19__text__["a" /* default */ ],
                    html: __WEBPACK_IMPORTED_MODULE_20__html__["a" /* default */ ],
                    raise: __WEBPACK_IMPORTED_MODULE_21__raise__["a" /* default */ ],
                    lower: __WEBPACK_IMPORTED_MODULE_22__lower__["a" /* default */ ],
                    append: __WEBPACK_IMPORTED_MODULE_23__append__["a" /* default */ ],
                    insert: __WEBPACK_IMPORTED_MODULE_24__insert__["a" /* default */ ],
                    remove: __WEBPACK_IMPORTED_MODULE_25__remove__["a" /* default */ ],
                    datum: __WEBPACK_IMPORTED_MODULE_26__datum__["a" /* default */ ],
                    on: __WEBPACK_IMPORTED_MODULE_27__on__["c" /* default */ ],
                    dispatch: __WEBPACK_IMPORTED_MODULE_28__dispatch__["a" /* default */ ]
                };

                /* harmony default export */
                __webpack_exports__["a"] = selection;


                /***/
            }),
            /* 1 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_dispatch__ = __webpack_require__(29);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1_d3_timer__ = __webpack_require__(41);
                /* unused harmony export CREATED */
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "d", function() { return SCHEDULED; });
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "a", function() { return STARTING; });
                /* unused harmony export STARTED */
                /* unused harmony export RUNNING */
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "b", function() { return ENDING; });
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "c", function() { return ENDED; });
                /* harmony export (immutable) */
                __webpack_exports__["g"] = init;
                /* harmony export (immutable) */
                __webpack_exports__["e"] = set;
                /* harmony export (immutable) */
                __webpack_exports__["f"] = get;



                var emptyOn = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_dispatch__["dispatch"])("start", "end", "interrupt");
                var emptyTween = [];

                var CREATED = 0;
                var SCHEDULED = 1;
                var STARTING = 2;
                var STARTED = 3;
                var RUNNING = 4;
                var ENDING = 5;
                var ENDED = 6;

                /* harmony default export */
                __webpack_exports__["h"] = function(node, name, id, index, group, timing) {
                    var schedules = node.__transition;
                    if (!schedules) node.__transition = {};
                    else if (id in schedules) return;
                    create(node, id, {
                        name: name,
                        index: index, // For context during callback.
                        group: group, // For context during callback.
                        on: emptyOn,
                        tween: emptyTween,
                        time: timing.time,
                        delay: timing.delay,
                        duration: timing.duration,
                        ease: timing.ease,
                        timer: null,
                        state: CREATED
                    });
                };

                function init(node, id) {
                    var schedule = node.__transition;
                    if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error("too late");
                    return schedule;
                }

                function set(node, id) {
                    var schedule = node.__transition;
                    if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error("too late");
                    return schedule;
                }

                function get(node, id) {
                    var schedule = node.__transition;
                    if (!schedule || !(schedule = schedule[id])) throw new Error("too late");
                    return schedule;
                }

                function create(node, id, self) {
                    var schedules = node.__transition,
                        tween;

                    // Initialize the self timer when the transition is created.
                    // Note the actual delay is not known until the first callback!
                    schedules[id] = self;
                    self.timer = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1_d3_timer__["a" /* timer */ ])(schedule, 0, self.time);

                    function schedule(elapsed) {
                        self.state = SCHEDULED;
                        self.timer.restart(start, self.delay, self.time);

                        // If the elapsed delay is less than our first sleep, start immediately.
                        if (self.delay <= elapsed) start(elapsed - self.delay);
                    }

                    function start(elapsed) {
                        var i, j, n, o;

                        // If the state is not SCHEDULED, then we previously errored on start.
                        if (self.state !== SCHEDULED) return stop();

                        for (i in schedules) {
                            o = schedules[i];
                            if (o.name !== self.name) continue;

                            // While this element already has a starting transition during this frame,
                            // defer starting an interrupting transition until that transition has a
                            // chance to tick (and possibly end); see d3/d3-transition#54!
                            if (o.state === STARTED) return __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1_d3_timer__["b" /* timeout */ ])(start);

                            // Interrupt the active transition, if any.
                            // Dispatch the interrupt event.
                            if (o.state === RUNNING) {
                                o.state = ENDED;
                                o.timer.stop();
                                o.on.call("interrupt", node, node.__data__, o.index, o.group);
                                delete schedules[i];
                            }

                            // Cancel any pre-empted transitions. No interrupt event is dispatched
                            // because the cancelled transitions never started. Note that this also
                            // removes this transition from the pending list!
                            else if (+i < id) {
                                o.state = ENDED;
                                o.timer.stop();
                                delete schedules[i];
                            }
                        }

                        // Defer the first tick to end of the current frame; see d3/d3#1576.
                        // Note the transition may be canceled after start and before the first tick!
                        // Note this must be scheduled before the start event; see d3/d3-transition#16!
                        // Assuming this is successful, subsequent callbacks go straight to tick.
                        __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1_d3_timer__["b" /* timeout */ ])(function() {
                            if (self.state === STARTED) {
                                self.state = RUNNING;
                                self.timer.restart(tick, self.delay, self.time);
                                tick(elapsed);
                            }
                        });

                        // Dispatch the start event.
                        // Note this must be done before the tween are initialized.
                        self.state = STARTING;
                        self.on.call("start", node, node.__data__, self.index, self.group);
                        if (self.state !== STARTING) return; // interrupted
                        self.state = STARTED;

                        // Initialize the tween, deleting null tween.
                        tween = new Array(n = self.tween.length);
                        for (i = 0, j = -1; i < n; ++i) {
                            if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
                                tween[++j] = o;
                            }
                        }
                        tween.length = j + 1;
                    }

                    function tick(elapsed) {
                        var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
                            i = -1,
                            n = tween.length;

                        while (++i < n) {
                            tween[i].call(null, t);
                        }

                        // Dispatch the end event.
                        if (self.state === ENDING) {
                            self.on.call("end", node, node.__data__, self.index, self.group);
                            stop();
                        }
                    }

                    function stop() {
                        self.state = ENDED;
                        self.timer.stop();
                        delete schedules[id];
                        for (var i in schedules) return; // eslint-disable-line no-unused-vars
                        delete node.__transition;
                    }
                }


                /***/
            }),
            /* 2 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                Object.defineProperty(__webpack_exports__, "__esModule", { value: true });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__src_creator__ = __webpack_require__(14);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "creator", function() { return __WEBPACK_IMPORTED_MODULE_0__src_creator__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__src_local__ = __webpack_require__(80);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "local", function() { return __WEBPACK_IMPORTED_MODULE_1__src_local__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__src_matcher__ = __webpack_require__(37);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "matcher", function() { return __WEBPACK_IMPORTED_MODULE_2__src_matcher__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_3__src_mouse__ = __webpack_require__(81);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "mouse", function() { return __WEBPACK_IMPORTED_MODULE_3__src_mouse__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_4__src_namespace__ = __webpack_require__(15);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "namespace", function() { return __WEBPACK_IMPORTED_MODULE_4__src_namespace__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_5__src_namespaces__ = __webpack_require__(16);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "namespaces", function() { return __WEBPACK_IMPORTED_MODULE_5__src_namespaces__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_6__src_select__ = __webpack_require__(82);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "select", function() { return __WEBPACK_IMPORTED_MODULE_6__src_select__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_7__src_selectAll__ = __webpack_require__(83);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "selectAll", function() { return __WEBPACK_IMPORTED_MODULE_7__src_selectAll__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_8__src_selection_index__ = __webpack_require__(0);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "selection", function() { return __WEBPACK_IMPORTED_MODULE_8__src_selection_index__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_9__src_selector__ = __webpack_require__(19);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "selector", function() { return __WEBPACK_IMPORTED_MODULE_9__src_selector__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_10__src_selectorAll__ = __webpack_require__(40);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "selectorAll", function() { return __WEBPACK_IMPORTED_MODULE_10__src_selectorAll__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_11__src_touch__ = __webpack_require__(111);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "touch", function() { return __WEBPACK_IMPORTED_MODULE_11__src_touch__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_12__src_touches__ = __webpack_require__(112);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "touches", function() { return __WEBPACK_IMPORTED_MODULE_12__src_touches__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_13__src_window__ = __webpack_require__(21);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "window", function() { return __WEBPACK_IMPORTED_MODULE_13__src_window__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_14__src_selection_on__ = __webpack_require__(18);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "event", function() { return __WEBPACK_IMPORTED_MODULE_14__src_selection_on__["a"]; });
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "customEvent", function() { return __WEBPACK_IMPORTED_MODULE_14__src_selection_on__["b"]; });

















                /***/
            }),
            /* 3 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_selection__ = __webpack_require__(2);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__attr__ = __webpack_require__(120);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__attrTween__ = __webpack_require__(121);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_3__delay__ = __webpack_require__(122);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_4__duration__ = __webpack_require__(123);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_5__ease__ = __webpack_require__(124);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_6__filter__ = __webpack_require__(125);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_7__merge__ = __webpack_require__(126);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_8__on__ = __webpack_require__(127);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_9__remove__ = __webpack_require__(128);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_10__select__ = __webpack_require__(129);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_11__selectAll__ = __webpack_require__(130);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_12__selection__ = __webpack_require__(131);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_13__style__ = __webpack_require__(132);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_14__styleTween__ = __webpack_require__(133);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_15__text__ = __webpack_require__(134);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_16__transition__ = __webpack_require__(135);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_17__tween__ = __webpack_require__(8);
                /* harmony export (immutable) */
                __webpack_exports__["b"] = Transition;
                /* harmony export (immutable) */
                __webpack_exports__["a"] = transition;
                /* harmony export (immutable) */
                __webpack_exports__["c"] = newId;



















                var id = 0;

                function Transition(groups, parents, name, id) {
                    this._groups = groups;
                    this._parents = parents;
                    this._name = name;
                    this._id = id;
                }

                function transition(name) {
                    return __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_selection__["selection"])().transition(name);
                }

                function newId() {
                    return ++id;
                }

                var selection_prototype = __WEBPACK_IMPORTED_MODULE_0_d3_selection__["selection"].prototype;

                Transition.prototype = transition.prototype = {
                    constructor: Transition,
                    select: __WEBPACK_IMPORTED_MODULE_10__select__["a" /* default */ ],
                    selectAll: __WEBPACK_IMPORTED_MODULE_11__selectAll__["a" /* default */ ],
                    filter: __WEBPACK_IMPORTED_MODULE_6__filter__["a" /* default */ ],
                    merge: __WEBPACK_IMPORTED_MODULE_7__merge__["a" /* default */ ],
                    selection: __WEBPACK_IMPORTED_MODULE_12__selection__["a" /* default */ ],
                    transition: __WEBPACK_IMPORTED_MODULE_16__transition__["a" /* default */ ],
                    call: selection_prototype.call,
                    nodes: selection_prototype.nodes,
                    node: selection_prototype.node,
                    size: selection_prototype.size,
                    empty: selection_prototype.empty,
                    each: selection_prototype.each,
                    on: __WEBPACK_IMPORTED_MODULE_8__on__["a" /* default */ ],
                    attr: __WEBPACK_IMPORTED_MODULE_1__attr__["a" /* default */ ],
                    attrTween: __WEBPACK_IMPORTED_MODULE_2__attrTween__["a" /* default */ ],
                    style: __WEBPACK_IMPORTED_MODULE_13__style__["a" /* default */ ],
                    styleTween: __WEBPACK_IMPORTED_MODULE_14__styleTween__["a" /* default */ ],
                    text: __WEBPACK_IMPORTED_MODULE_15__text__["a" /* default */ ],
                    remove: __WEBPACK_IMPORTED_MODULE_9__remove__["a" /* default */ ],
                    tween: __WEBPACK_IMPORTED_MODULE_17__tween__["a" /* default */ ],
                    delay: __WEBPACK_IMPORTED_MODULE_3__delay__["a" /* default */ ],
                    duration: __WEBPACK_IMPORTED_MODULE_4__duration__["a" /* default */ ],
                    ease: __WEBPACK_IMPORTED_MODULE_5__ease__["a" /* default */ ]
                };


                /***/
            }),
            /* 4 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__src_color__ = __webpack_require__(9);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "a", function() { return __WEBPACK_IMPORTED_MODULE_0__src_color__["a"]; });
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "f", function() { return __WEBPACK_IMPORTED_MODULE_0__src_color__["h"]; });
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "e", function() { return __WEBPACK_IMPORTED_MODULE_0__src_color__["g"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__src_lab__ = __webpack_require__(56);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "d", function() { return __WEBPACK_IMPORTED_MODULE_1__src_lab__["b"]; });
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "c", function() { return __WEBPACK_IMPORTED_MODULE_1__src_lab__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__src_cubehelix__ = __webpack_require__(55);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "b", function() { return __WEBPACK_IMPORTED_MODULE_2__src_cubehelix__["a"]; });





                /***/
            }),
            /* 5 */
            /***/
            (function(module, exports, __webpack_require__) {

                /* WEBPACK VAR INJECTION */
                (function(global, module) {
                    var __WEBPACK_AMD_DEFINE_RESULT__;
                    /**
                     * @license
                     * Lodash <https://lodash.com/>
                     * Copyright JS Foundation and other contributors <https://js.foundation/>
                     * Released under MIT license <https://lodash.com/license>
                     * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
                     * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
                     */
                    ;
                    (function() {

                        /** Used as a safe reference for `undefined` in pre-ES5 environments. */
                        var undefined;

                        /** Used as the semantic version number. */
                        var VERSION = '4.17.4';

                        /** Used as the size to enable large array optimizations. */
                        var LARGE_ARRAY_SIZE = 200;

                        /** Error message constants. */
                        var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
                            FUNC_ERROR_TEXT = 'Expected a function';

                        /** Used to stand-in for `undefined` hash values. */
                        var HASH_UNDEFINED = '__lodash_hash_undefined__';

                        /** Used as the maximum memoize cache size. */
                        var MAX_MEMOIZE_SIZE = 500;

                        /** Used as the internal argument placeholder. */
                        var PLACEHOLDER = '__lodash_placeholder__';

                        /** Used to compose bitmasks for cloning. */
                        var CLONE_DEEP_FLAG = 1,
                            CLONE_FLAT_FLAG = 2,
                            CLONE_SYMBOLS_FLAG = 4;

                        /** Used to compose bitmasks for value comparisons. */
                        var COMPARE_PARTIAL_FLAG = 1,
                            COMPARE_UNORDERED_FLAG = 2;

                        /** Used to compose bitmasks for function metadata. */
                        var WRAP_BIND_FLAG = 1,
                            WRAP_BIND_KEY_FLAG = 2,
                            WRAP_CURRY_BOUND_FLAG = 4,
                            WRAP_CURRY_FLAG = 8,
                            WRAP_CURRY_RIGHT_FLAG = 16,
                            WRAP_PARTIAL_FLAG = 32,
                            WRAP_PARTIAL_RIGHT_FLAG = 64,
                            WRAP_ARY_FLAG = 128,
                            WRAP_REARG_FLAG = 256,
                            WRAP_FLIP_FLAG = 512;

                        /** Used as default options for `_.truncate`. */
                        var DEFAULT_TRUNC_LENGTH = 30,
                            DEFAULT_TRUNC_OMISSION = '...';

                        /** Used to detect hot functions by number of calls within a span of milliseconds. */
                        var HOT_COUNT = 800,
                            HOT_SPAN = 16;

                        /** Used to indicate the type of lazy iteratees. */
                        var LAZY_FILTER_FLAG = 1,
                            LAZY_MAP_FLAG = 2,
                            LAZY_WHILE_FLAG = 3;

                        /** Used as references for various `Number` constants. */
                        var INFINITY = 1 / 0,
                            MAX_SAFE_INTEGER = 9007199254740991,
                            MAX_INTEGER = 1.7976931348623157e+308,
                            NAN = 0 / 0;

                        /** Used as references for the maximum length and index of an array. */
                        var MAX_ARRAY_LENGTH = 4294967295,
                            MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
                            HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;

                        /** Used to associate wrap methods with their bit flags. */
                        var wrapFlags = [
                            ['ary', WRAP_ARY_FLAG],
                            ['bind', WRAP_BIND_FLAG],
                            ['bindKey', WRAP_BIND_KEY_FLAG],
                            ['curry', WRAP_CURRY_FLAG],
                            ['curryRight', WRAP_CURRY_RIGHT_FLAG],
                            ['flip', WRAP_FLIP_FLAG],
                            ['partial', WRAP_PARTIAL_FLAG],
                            ['partialRight', WRAP_PARTIAL_RIGHT_FLAG],
                            ['rearg', WRAP_REARG_FLAG]
                        ];

                        /** `Object#toString` result references. */
                        var argsTag = '[object Arguments]',
                            arrayTag = '[object Array]',
                            asyncTag = '[object AsyncFunction]',
                            boolTag = '[object Boolean]',
                            dateTag = '[object Date]',
                            domExcTag = '[object DOMException]',
                            errorTag = '[object Error]',
                            funcTag = '[object Function]',
                            genTag = '[object GeneratorFunction]',
                            mapTag = '[object Map]',
                            numberTag = '[object Number]',
                            nullTag = '[object Null]',
                            objectTag = '[object Object]',
                            promiseTag = '[object Promise]',
                            proxyTag = '[object Proxy]',
                            regexpTag = '[object RegExp]',
                            setTag = '[object Set]',
                            stringTag = '[object String]',
                            symbolTag = '[object Symbol]',
                            undefinedTag = '[object Undefined]',
                            weakMapTag = '[object WeakMap]',
                            weakSetTag = '[object WeakSet]';

                        var arrayBufferTag = '[object ArrayBuffer]',
                            dataViewTag = '[object DataView]',
                            float32Tag = '[object Float32Array]',
                            float64Tag = '[object Float64Array]',
                            int8Tag = '[object Int8Array]',
                            int16Tag = '[object Int16Array]',
                            int32Tag = '[object Int32Array]',
                            uint8Tag = '[object Uint8Array]',
                            uint8ClampedTag = '[object Uint8ClampedArray]',
                            uint16Tag = '[object Uint16Array]',
                            uint32Tag = '[object Uint32Array]';

                        /** Used to match empty string literals in compiled template source. */
                        var reEmptyStringLeading = /\b__p \+= '';/g,
                            reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
                            reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;

                        /** Used to match HTML entities and HTML characters. */
                        var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
                            reUnescapedHtml = /[&<>"']/g,
                            reHasEscapedHtml = RegExp(reEscapedHtml.source),
                            reHasUnescapedHtml = RegExp(reUnescapedHtml.source);

                        /** Used to match template delimiters. */
                        var reEscape = /<%-([\s\S]+?)%>/g,
                            reEvaluate = /<%([\s\S]+?)%>/g,
                            reInterpolate = /<%=([\s\S]+?)%>/g;

                        /** Used to match property names within property paths. */
                        var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
                            reIsPlainProp = /^\w*$/,
                            reLeadingDot = /^\./,
                            rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;

                        /**
                         * Used to match `RegExp`
                         * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
                         */
                        var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
                            reHasRegExpChar = RegExp(reRegExpChar.source);

                        /** Used to match leading and trailing whitespace. */
                        var reTrim = /^\s+|\s+$/g,
                            reTrimStart = /^\s+/,
                            reTrimEnd = /\s+$/;

                        /** Used to match wrap detail comments. */
                        var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
                            reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
                            reSplitDetails = /,? & /;

                        /** Used to match words composed of alphanumeric characters. */
                        var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;

                        /** Used to match backslashes in property paths. */
                        var reEscapeChar = /\\(\\)?/g;

                        /**
                         * Used to match
                         * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
                         */
                        var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;

                        /** Used to match `RegExp` flags from their coerced string values. */
                        var reFlags = /\w*$/;

                        /** Used to detect bad signed hexadecimal string values. */
                        var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;

                        /** Used to detect binary string values. */
                        var reIsBinary = /^0b[01]+$/i;

                        /** Used to detect host constructors (Safari). */
                        var reIsHostCtor = /^\[object .+?Constructor\]$/;

                        /** Used to detect octal string values. */
                        var reIsOctal = /^0o[0-7]+$/i;

                        /** Used to detect unsigned integer values. */
                        var reIsUint = /^(?:0|[1-9]\d*)$/;

                        /** Used to match Latin Unicode letters (excluding mathematical operators). */
                        var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;

                        /** Used to ensure capturing order of template delimiters. */
                        var reNoMatch = /($^)/;

                        /** Used to match unescaped characters in compiled string literals. */
                        var reUnescapedString = /['\n\r\u2028\u2029\\]/g;

                        /** Used to compose unicode character classes. */
                        var rsAstralRange = '\\ud800-\\udfff',
                            rsComboMarksRange = '\\u0300-\\u036f',
                            reComboHalfMarksRange = '\\ufe20-\\ufe2f',
                            rsComboSymbolsRange = '\\u20d0-\\u20ff',
                            rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
                            rsDingbatRange = '\\u2700-\\u27bf',
                            rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
                            rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
                            rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
                            rsPunctuationRange = '\\u2000-\\u206f',
                            rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
                            rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
                            rsVarRange = '\\ufe0e\\ufe0f',
                            rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;

                        /** Used to compose unicode capture groups. */
                        var rsApos = "['\u2019]",
                            rsAstral = '[' + rsAstralRange + ']',
                            rsBreak = '[' + rsBreakRange + ']',
                            rsCombo = '[' + rsComboRange + ']',
                            rsDigits = '\\d+',
                            rsDingbat = '[' + rsDingbatRange + ']',
                            rsLower = '[' + rsLowerRange + ']',
                            rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
                            rsFitz = '\\ud83c[\\udffb-\\udfff]',
                            rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
                            rsNonAstral = '[^' + rsAstralRange + ']',
                            rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
                            rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
                            rsUpper = '[' + rsUpperRange + ']',
                            rsZWJ = '\\u200d';

                        /** Used to compose unicode regexes. */
                        var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
                            rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
                            rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
                            rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
                            reOptMod = rsModifier + '?',
                            rsOptVar = '[' + rsVarRange + ']?',
                            rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
                            rsOrdLower = '\\d*(?:(?:1st|2nd|3rd|(?![123])\\dth)\\b)',
                            rsOrdUpper = '\\d*(?:(?:1ST|2ND|3RD|(?![123])\\dTH)\\b)',
                            rsSeq = rsOptVar + reOptMod + rsOptJoin,
                            rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
                            rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';

                        /** Used to match apostrophes. */
                        var reApos = RegExp(rsApos, 'g');

                        /**
                         * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
                         * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
                         */
                        var reComboMark = RegExp(rsCombo, 'g');

                        /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
                        var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');

                        /** Used to match complex or compound words. */
                        var reUnicodeWord = RegExp([
                            rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
                            rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',
                            rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,
                            rsUpper + '+' + rsOptContrUpper,
                            rsOrdUpper,
                            rsOrdLower,
                            rsDigits,
                            rsEmoji
                        ].join('|'), 'g');

                        /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
                        var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');

                        /** Used to detect strings that need a more robust regexp to match words. */
                        var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;

                        /** Used to assign default `context` object properties. */
                        var contextProps = [
                            'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
                            'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
                            'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
                            'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
                            '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
                        ];

                        /** Used to make template sourceURLs easier to identify. */
                        var templateCounter = -1;

                        /** Used to identify `toStringTag` values of typed arrays. */
                        var typedArrayTags = {};
                        typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
                            typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
                            typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
                            typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
                            typedArrayTags[uint32Tag] = true;
                        typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
                            typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
                            typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
                            typedArrayTags[errorTag] = typedArrayTags[funcTag] =
                            typedArrayTags[mapTag] = typedArrayTags[numberTag] =
                            typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
                            typedArrayTags[setTag] = typedArrayTags[stringTag] =
                            typedArrayTags[weakMapTag] = false;

                        /** Used to identify `toStringTag` values supported by `_.clone`. */
                        var cloneableTags = {};
                        cloneableTags[argsTag] = cloneableTags[arrayTag] =
                            cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
                            cloneableTags[boolTag] = cloneableTags[dateTag] =
                            cloneableTags[float32Tag] = cloneableTags[float64Tag] =
                            cloneableTags[int8Tag] = cloneableTags[int16Tag] =
                            cloneableTags[int32Tag] = cloneableTags[mapTag] =
                            cloneableTags[numberTag] = cloneableTags[objectTag] =
                            cloneableTags[regexpTag] = cloneableTags[setTag] =
                            cloneableTags[stringTag] = cloneableTags[symbolTag] =
                            cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
                            cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
                        cloneableTags[errorTag] = cloneableTags[funcTag] =
                            cloneableTags[weakMapTag] = false;

                        /** Used to map Latin Unicode letters to basic Latin letters. */
                        var deburredLetters = {
                            // Latin-1 Supplement block.
                            '\xc0': 'A',
                            '\xc1': 'A',
                            '\xc2': 'A',
                            '\xc3': 'A',
                            '\xc4': 'A',
                            '\xc5': 'A',
                            '\xe0': 'a',
                            '\xe1': 'a',
                            '\xe2': 'a',
                            '\xe3': 'a',
                            '\xe4': 'a',
                            '\xe5': 'a',
                            '\xc7': 'C',
                            '\xe7': 'c',
                            '\xd0': 'D',
                            '\xf0': 'd',
                            '\xc8': 'E',
                            '\xc9': 'E',
                            '\xca': 'E',
                            '\xcb': 'E',
                            '\xe8': 'e',
                            '\xe9': 'e',
                            '\xea': 'e',
                            '\xeb': 'e',
                            '\xcc': 'I',
                            '\xcd': 'I',
                            '\xce': 'I',
                            '\xcf': 'I',
                            '\xec': 'i',
                            '\xed': 'i',
                            '\xee': 'i',
                            '\xef': 'i',
                            '\xd1': 'N',
                            '\xf1': 'n',
                            '\xd2': 'O',
                            '\xd3': 'O',
                            '\xd4': 'O',
                            '\xd5': 'O',
                            '\xd6': 'O',
                            '\xd8': 'O',
                            '\xf2': 'o',
                            '\xf3': 'o',
                            '\xf4': 'o',
                            '\xf5': 'o',
                            '\xf6': 'o',
                            '\xf8': 'o',
                            '\xd9': 'U',
                            '\xda': 'U',
                            '\xdb': 'U',
                            '\xdc': 'U',
                            '\xf9': 'u',
                            '\xfa': 'u',
                            '\xfb': 'u',
                            '\xfc': 'u',
                            '\xdd': 'Y',
                            '\xfd': 'y',
                            '\xff': 'y',
                            '\xc6': 'Ae',
                            '\xe6': 'ae',
                            '\xde': 'Th',
                            '\xfe': 'th',
                            '\xdf': 'ss',
                            // Latin Extended-A block.
                            '\u0100': 'A',
                            '\u0102': 'A',
                            '\u0104': 'A',
                            '\u0101': 'a',
                            '\u0103': 'a',
                            '\u0105': 'a',
                            '\u0106': 'C',
                            '\u0108': 'C',
                            '\u010a': 'C',
                            '\u010c': 'C',
                            '\u0107': 'c',
                            '\u0109': 'c',
                            '\u010b': 'c',
                            '\u010d': 'c',
                            '\u010e': 'D',
                            '\u0110': 'D',
                            '\u010f': 'd',
                            '\u0111': 'd',
                            '\u0112': 'E',
                            '\u0114': 'E',
                            '\u0116': 'E',
                            '\u0118': 'E',
                            '\u011a': 'E',
                            '\u0113': 'e',
                            '\u0115': 'e',
                            '\u0117': 'e',
                            '\u0119': 'e',
                            '\u011b': 'e',
                            '\u011c': 'G',
                            '\u011e': 'G',
                            '\u0120': 'G',
                            '\u0122': 'G',
                            '\u011d': 'g',
                            '\u011f': 'g',
                            '\u0121': 'g',
                            '\u0123': 'g',
                            '\u0124': 'H',
                            '\u0126': 'H',
                            '\u0125': 'h',
                            '\u0127': 'h',
                            '\u0128': 'I',
                            '\u012a': 'I',
                            '\u012c': 'I',
                            '\u012e': 'I',
                            '\u0130': 'I',
                            '\u0129': 'i',
                            '\u012b': 'i',
                            '\u012d': 'i',
                            '\u012f': 'i',
                            '\u0131': 'i',
                            '\u0134': 'J',
                            '\u0135': 'j',
                            '\u0136': 'K',
                            '\u0137': 'k',
                            '\u0138': 'k',
                            '\u0139': 'L',
                            '\u013b': 'L',
                            '\u013d': 'L',
                            '\u013f': 'L',
                            '\u0141': 'L',
                            '\u013a': 'l',
                            '\u013c': 'l',
                            '\u013e': 'l',
                            '\u0140': 'l',
                            '\u0142': 'l',
                            '\u0143': 'N',
                            '\u0145': 'N',
                            '\u0147': 'N',
                            '\u014a': 'N',
                            '\u0144': 'n',
                            '\u0146': 'n',
                            '\u0148': 'n',
                            '\u014b': 'n',
                            '\u014c': 'O',
                            '\u014e': 'O',
                            '\u0150': 'O',
                            '\u014d': 'o',
                            '\u014f': 'o',
                            '\u0151': 'o',
                            '\u0154': 'R',
                            '\u0156': 'R',
                            '\u0158': 'R',
                            '\u0155': 'r',
                            '\u0157': 'r',
                            '\u0159': 'r',
                            '\u015a': 'S',
                            '\u015c': 'S',
                            '\u015e': 'S',
                            '\u0160': 'S',
                            '\u015b': 's',
                            '\u015d': 's',
                            '\u015f': 's',
                            '\u0161': 's',
                            '\u0162': 'T',
                            '\u0164': 'T',
                            '\u0166': 'T',
                            '\u0163': 't',
                            '\u0165': 't',
                            '\u0167': 't',
                            '\u0168': 'U',
                            '\u016a': 'U',
                            '\u016c': 'U',
                            '\u016e': 'U',
                            '\u0170': 'U',
                            '\u0172': 'U',
                            '\u0169': 'u',
                            '\u016b': 'u',
                            '\u016d': 'u',
                            '\u016f': 'u',
                            '\u0171': 'u',
                            '\u0173': 'u',
                            '\u0174': 'W',
                            '\u0175': 'w',
                            '\u0176': 'Y',
                            '\u0177': 'y',
                            '\u0178': 'Y',
                            '\u0179': 'Z',
                            '\u017b': 'Z',
                            '\u017d': 'Z',
                            '\u017a': 'z',
                            '\u017c': 'z',
                            '\u017e': 'z',
                            '\u0132': 'IJ',
                            '\u0133': 'ij',
                            '\u0152': 'Oe',
                            '\u0153': 'oe',
                            '\u0149': "'n",
                            '\u017f': 's'
                        };

                        /** Used to map characters to HTML entities. */
                        var htmlEscapes = {
                            '&': '&amp;',
                            '<': '&lt;',
                            '>': '&gt;',
                            '"': '&quot;',
                            "'": '&#39;'
                        };

                        /** Used to map HTML entities to characters. */
                        var htmlUnescapes = {
                            '&amp;': '&',
                            '&lt;': '<',
                            '&gt;': '>',
                            '&quot;': '"',
                            '&#39;': "'"
                        };

                        /** Used to escape characters for inclusion in compiled string literals. */
                        var stringEscapes = {
                            '\\': '\\',
                            "'": "'",
                            '\n': 'n',
                            '\r': 'r',
                            '\u2028': 'u2028',
                            '\u2029': 'u2029'
                        };

                        /** Built-in method references without a dependency on `root`. */
                        var freeParseFloat = parseFloat,
                            freeParseInt = parseInt;

                        /** Detect free variable `global` from Node.js. */
                        var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;

                        /** Detect free variable `self`. */
                        var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

                        /** Used as a reference to the global object. */
                        var root = freeGlobal || freeSelf || Function('return this')();

                        /** Detect free variable `exports`. */
                        var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;

                        /** Detect free variable `module`. */
                        var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;

                        /** Detect the popular CommonJS extension `module.exports`. */
                        var moduleExports = freeModule && freeModule.exports === freeExports;

                        /** Detect free variable `process` from Node.js. */
                        var freeProcess = moduleExports && freeGlobal.process;

                        /** Used to access faster Node.js helpers. */
                        var nodeUtil = (function() {
                            try {
                                return freeProcess && freeProcess.binding && freeProcess.binding('util');
                            } catch (e) {}
                        }());

                        /* Node.js helper references. */
                        var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
                            nodeIsDate = nodeUtil && nodeUtil.isDate,
                            nodeIsMap = nodeUtil && nodeUtil.isMap,
                            nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
                            nodeIsSet = nodeUtil && nodeUtil.isSet,
                            nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;

                        /*--------------------------------------------------------------------------*/

                        /**
                         * Adds the key-value `pair` to `map`.
                         *
                         * @private
                         * @param {Object} map The map to modify.
                         * @param {Array} pair The key-value pair to add.
                         * @returns {Object} Returns `map`.
                         */
                        function addMapEntry(map, pair) {
                            // Don't return `map.set` because it's not chainable in IE 11.
                            map.set(pair[0], pair[1]);
                            return map;
                        }

                        /**
                         * Adds `value` to `set`.
                         *
                         * @private
                         * @param {Object} set The set to modify.
                         * @param {*} value The value to add.
                         * @returns {Object} Returns `set`.
                         */
                        function addSetEntry(set, value) {
                            // Don't return `set.add` because it's not chainable in IE 11.
                            set.add(value);
                            return set;
                        }

                        /**
                         * A faster alternative to `Function#apply`, this function invokes `func`
                         * with the `this` binding of `thisArg` and the arguments of `args`.
                         *
                         * @private
                         * @param {Function} func The function to invoke.
                         * @param {*} thisArg The `this` binding of `func`.
                         * @param {Array} args The arguments to invoke `func` with.
                         * @returns {*} Returns the result of `func`.
                         */
                        function apply(func, thisArg, args) {
                            switch (args.length) {
                                case 0:
                                    return func.call(thisArg);
                                case 1:
                                    return func.call(thisArg, args[0]);
                                case 2:
                                    return func.call(thisArg, args[0], args[1]);
                                case 3:
                                    return func.call(thisArg, args[0], args[1], args[2]);
                            }
                            return func.apply(thisArg, args);
                        }

                        /**
                         * A specialized version of `baseAggregator` for arrays.
                         *
                         * @private
                         * @param {Array} [array] The array to iterate over.
                         * @param {Function} setter The function to set `accumulator` values.
                         * @param {Function} iteratee The iteratee to transform keys.
                         * @param {Object} accumulator The initial aggregated object.
                         * @returns {Function} Returns `accumulator`.
                         */
                        function arrayAggregator(array, setter, iteratee, accumulator) {
                            var index = -1,
                                length = array == null ? 0 : array.length;

                            while (++index < length) {
                                var value = array[index];
                                setter(accumulator, value, iteratee(value), array);
                            }
                            return accumulator;
                        }

                        /**
                         * A specialized version of `_.forEach` for arrays without support for
                         * iteratee shorthands.
                         *
                         * @private
                         * @param {Array} [array] The array to iterate over.
                         * @param {Function} iteratee The function invoked per iteration.
                         * @returns {Array} Returns `array`.
                         */
                        function arrayEach(array, iteratee) {
                            var index = -1,
                                length = array == null ? 0 : array.length;

                            while (++index < length) {
                                if (iteratee(array[index], index, array) === false) {
                                    break;
                                }
                            }
                            return array;
                        }

                        /**
                         * A specialized version of `_.forEachRight` for arrays without support for
                         * iteratee shorthands.
                         *
                         * @private
                         * @param {Array} [array] The array to iterate over.
                         * @param {Function} iteratee The function invoked per iteration.
                         * @returns {Array} Returns `array`.
                         */
                        function arrayEachRight(array, iteratee) {
                            var length = array == null ? 0 : array.length;

                            while (length--) {
                                if (iteratee(array[length], length, array) === false) {
                                    break;
                                }
                            }
                            return array;
                        }

                        /**
                         * A specialized version of `_.every` for arrays without support for
                         * iteratee shorthands.
                         *
                         * @private
                         * @param {Array} [array] The array to iterate over.
                         * @param {Function} predicate The function invoked per iteration.
                         * @returns {boolean} Returns `true` if all elements pass the predicate check,
                         *  else `false`.
                         */
                        function arrayEvery(array, predicate) {
                            var index = -1,
                                length = array == null ? 0 : array.length;

                            while (++index < length) {
                                if (!predicate(array[index], index, array)) {
                                    return false;
                                }
                            }
                            return true;
                        }

                        /**
                         * A specialized version of `_.filter` for arrays without support for
                         * iteratee shorthands.
                         *
                         * @private
                         * @param {Array} [array] The array to iterate over.
                         * @param {Function} predicate The function invoked per iteration.
                         * @returns {Array} Returns the new filtered array.
                         */
                        function arrayFilter(array, predicate) {
                            var index = -1,
                                length = array == null ? 0 : array.length,
                                resIndex = 0,
                                result = [];

                            while (++index < length) {
                                var value = array[index];
                                if (predicate(value, index, array)) {
                                    result[resIndex++] = value;
                                }
                            }
                            return result;
                        }

                        /**
                         * A specialized version of `_.includes` for arrays without support for
                         * specifying an index to search from.
                         *
                         * @private
                         * @param {Array} [array] The array to inspect.
                         * @param {*} target The value to search for.
                         * @returns {boolean} Returns `true` if `target` is found, else `false`.
                         */
                        function arrayIncludes(array, value) {
                            var length = array == null ? 0 : array.length;
                            return !!length && baseIndexOf(array, value, 0) > -1;
                        }

                        /**
                         * This function is like `arrayIncludes` except that it accepts a comparator.
                         *
                         * @private
                         * @param {Array} [array] The array to inspect.
                         * @param {*} target The value to search for.
                         * @param {Function} comparator The comparator invoked per element.
                         * @returns {boolean} Returns `true` if `target` is found, else `false`.
                         */
                        function arrayIncludesWith(array, value, comparator) {
                            var index = -1,
                                length = array == null ? 0 : array.length;

                            while (++index < length) {
                                if (comparator(value, array[index])) {
                                    return true;
                                }
                            }
                            return false;
                        }

                        /**
                         * A specialized version of `_.map` for arrays without support for iteratee
                         * shorthands.
                         *
                         * @private
                         * @param {Array} [array] The array to iterate over.
                         * @param {Function} iteratee The function invoked per iteration.
                         * @returns {Array} Returns the new mapped array.
                         */
                        function arrayMap(array, iteratee) {
                            var index = -1,
                                length = array == null ? 0 : array.length,
                                result = Array(length);

                            while (++index < length) {
                                result[index] = iteratee(array[index], index, array);
                            }
                            return result;
                        }

                        /**
                         * Appends the elements of `values` to `array`.
                         *
                         * @private
                         * @param {Array} array The array to modify.
                         * @param {Array} values The values to append.
                         * @returns {Array} Returns `array`.
                         */
                        function arrayPush(array, values) {
                            var index = -1,
                                length = values.length,
                                offset = array.length;

                            while (++index < length) {
                                array[offset + index] = values[index];
                            }
                            return array;
                        }

                        /**
                         * A specialized version of `_.reduce` for arrays without support for
                         * iteratee shorthands.
                         *
                         * @private
                         * @param {Array} [array] The array to iterate over.
                         * @param {Function} iteratee The function invoked per iteration.
                         * @param {*} [accumulator] The initial value.
                         * @param {boolean} [initAccum] Specify using the first element of `array` as
                         *  the initial value.
                         * @returns {*} Returns the accumulated value.
                         */
                        function arrayReduce(array, iteratee, accumulator, initAccum) {
                            var index = -1,
                                length = array == null ? 0 : array.length;

                            if (initAccum && length) {
                                accumulator = array[++index];
                            }
                            while (++index < length) {
                                accumulator = iteratee(accumulator, array[index], index, array);
                            }
                            return accumulator;
                        }

                        /**
                         * A specialized version of `_.reduceRight` for arrays without support for
                         * iteratee shorthands.
                         *
                         * @private
                         * @param {Array} [array] The array to iterate over.
                         * @param {Function} iteratee The function invoked per iteration.
                         * @param {*} [accumulator] The initial value.
                         * @param {boolean} [initAccum] Specify using the last element of `array` as
                         *  the initial value.
                         * @returns {*} Returns the accumulated value.
                         */
                        function arrayReduceRight(array, iteratee, accumulator, initAccum) {
                            var length = array == null ? 0 : array.length;
                            if (initAccum && length) {
                                accumulator = array[--length];
                            }
                            while (length--) {
                                accumulator = iteratee(accumulator, array[length], length, array);
                            }
                            return accumulator;
                        }

                        /**
                         * A specialized version of `_.some` for arrays without support for iteratee
                         * shorthands.
                         *
                         * @private
                         * @param {Array} [array] The array to iterate over.
                         * @param {Function} predicate The function invoked per iteration.
                         * @returns {boolean} Returns `true` if any element passes the predicate check,
                         *  else `false`.
                         */
                        function arraySome(array, predicate) {
                            var index = -1,
                                length = array == null ? 0 : array.length;

                            while (++index < length) {
                                if (predicate(array[index], index, array)) {
                                    return true;
                                }
                            }
                            return false;
                        }

                        /**
                         * Gets the size of an ASCII `string`.
                         *
                         * @private
                         * @param {string} string The string inspect.
                         * @returns {number} Returns the string size.
                         */
                        var asciiSize = baseProperty('length');

                        /**
                         * Converts an ASCII `string` to an array.
                         *
                         * @private
                         * @param {string} string The string to convert.
                         * @returns {Array} Returns the converted array.
                         */
                        function asciiToArray(string) {
                            return string.split('');
                        }

                        /**
                         * Splits an ASCII `string` into an array of its words.
                         *
                         * @private
                         * @param {string} The string to inspect.
                         * @returns {Array} Returns the words of `string`.
                         */
                        function asciiWords(string) {
                            return string.match(reAsciiWord) || [];
                        }

                        /**
                         * The base implementation of methods like `_.findKey` and `_.findLastKey`,
                         * without support for iteratee shorthands, which iterates over `collection`
                         * using `eachFunc`.
                         *
                         * @private
                         * @param {Array|Object} collection The collection to inspect.
                         * @param {Function} predicate The function invoked per iteration.
                         * @param {Function} eachFunc The function to iterate over `collection`.
                         * @returns {*} Returns the found element or its key, else `undefined`.
                         */
                        function baseFindKey(collection, predicate, eachFunc) {
                            var result;
                            eachFunc(collection, function(value, key, collection) {
                                if (predicate(value, key, collection)) {
                                    result = key;
                                    return false;
                                }
                            });
                            return result;
                        }

                        /**
                         * The base implementation of `_.findIndex` and `_.findLastIndex` without
                         * support for iteratee shorthands.
                         *
                         * @private
                         * @param {Array} array The array to inspect.
                         * @param {Function} predicate The function invoked per iteration.
                         * @param {number} fromIndex The index to search from.
                         * @param {boolean} [fromRight] Specify iterating from right to left.
                         * @returns {number} Returns the index of the matched value, else `-1`.
                         */
                        function baseFindIndex(array, predicate, fromIndex, fromRight) {
                            var length = array.length,
                                index = fromIndex + (fromRight ? 1 : -1);

                            while ((fromRight ? index-- : ++index < length)) {
                                if (predicate(array[index], index, array)) {
                                    return index;
                                }
                            }
                            return -1;
                        }

                        /**
                         * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
                         *
                         * @private
                         * @param {Array} array The array to inspect.
                         * @param {*} value The value to search for.
                         * @param {number} fromIndex The index to search from.
                         * @returns {number} Returns the index of the matched value, else `-1`.
                         */
                        function baseIndexOf(array, value, fromIndex) {
                            return value === value ?
                                strictIndexOf(array, value, fromIndex) :
                                baseFindIndex(array, baseIsNaN, fromIndex);
                        }

                        /**
                         * This function is like `baseIndexOf` except that it accepts a comparator.
                         *
                         * @private
                         * @param {Array} array The array to inspect.
                         * @param {*} value The value to search for.
                         * @param {number} fromIndex The index to search from.
                         * @param {Function} comparator The comparator invoked per element.
                         * @returns {number} Returns the index of the matched value, else `-1`.
                         */
                        function baseIndexOfWith(array, value, fromIndex, comparator) {
                            var index = fromIndex - 1,
                                length = array.length;

                            while (++index < length) {
                                if (comparator(array[index], value)) {
                                    return index;
                                }
                            }
                            return -1;
                        }

                        /**
                         * The base implementation of `_.isNaN` without support for number objects.
                         *
                         * @private
                         * @param {*} value The value to check.
                         * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
                         */
                        function baseIsNaN(value) {
                            return value !== value;
                        }

                        /**
                         * The base implementation of `_.mean` and `_.meanBy` without support for
                         * iteratee shorthands.
                         *
                         * @private
                         * @param {Array} array The array to iterate over.
                         * @param {Function} iteratee The function invoked per iteration.
                         * @returns {number} Returns the mean.
                         */
                        function baseMean(array, iteratee) {
                            var length = array == null ? 0 : array.length;
                            return length ? (baseSum(array, iteratee) / length) : NAN;
                        }

                        /**
                         * The base implementation of `_.property` without support for deep paths.
                         *
                         * @private
                         * @param {string} key The key of the property to get.
                         * @returns {Function} Returns the new accessor function.
                         */
                        function baseProperty(key) {
                            return function(object) {
                                return object == null ? undefined : object[key];
                            };
                        }

                        /**
                         * The base implementation of `_.propertyOf` without support for deep paths.
                         *
                         * @private
                         * @param {Object} object The object to query.
                         * @returns {Function} Returns the new accessor function.
                         */
                        function basePropertyOf(object) {
                            return function(key) {
                                return object == null ? undefined : object[key];
                            };
                        }

                        /**
                         * The base implementation of `_.reduce` and `_.reduceRight`, without support
                         * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
                         *
                         * @private
                         * @param {Array|Object} collection The collection to iterate over.
                         * @param {Function} iteratee The function invoked per iteration.
                         * @param {*} accumulator The initial value.
                         * @param {boolean} initAccum Specify using the first or last element of
                         *  `collection` as the initial value.
                         * @param {Function} eachFunc The function to iterate over `collection`.
                         * @returns {*} Returns the accumulated value.
                         */
                        function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
                            eachFunc(collection, function(value, index, collection) {
                                accumulator = initAccum ?
                                    (initAccum = false, value) :
                                    iteratee(accumulator, value, index, collection);
                            });
                            return accumulator;
                        }

                        /**
                         * The base implementation of `_.sortBy` which uses `comparer` to define the
                         * sort order of `array` and replaces criteria objects with their corresponding
                         * values.
                         *
                         * @private
                         * @param {Array} array The array to sort.
                         * @param {Function} comparer The function to define sort order.
                         * @returns {Array} Returns `array`.
                         */
                        function baseSortBy(array, comparer) {
                            var length = array.length;

                            array.sort(comparer);
                            while (length--) {
                                array[length] = array[length].value;
                            }
                            return array;
                        }

                        /**
                         * The base implementation of `_.sum` and `_.sumBy` without support for
                         * iteratee shorthands.
                         *
                         * @private
                         * @param {Array} array The array to iterate over.
                         * @param {Function} iteratee The function invoked per iteration.
                         * @returns {number} Returns the sum.
                         */
                        function baseSum(array, iteratee) {
                            var result,
                                index = -1,
                                length = array.length;

                            while (++index < length) {
                                var current = iteratee(array[index]);
                                if (current !== undefined) {
                                    result = result === undefined ? current : (result + current);
                                }
                            }
                            return result;
                        }

                        /**
                         * The base implementation of `_.times` without support for iteratee shorthands
                         * or max array length checks.
                         *
                         * @private
                         * @param {number} n The number of times to invoke `iteratee`.
                         * @param {Function} iteratee The function invoked per iteration.
                         * @returns {Array} Returns the array of results.
                         */
                        function baseTimes(n, iteratee) {
                            var index = -1,
                                result = Array(n);

                            while (++index < n) {
                                result[index] = iteratee(index);
                            }
                            return result;
                        }

                        /**
                         * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
                         * of key-value pairs for `object` corresponding to the property names of `props`.
                         *
                         * @private
                         * @param {Object} object The object to query.
                         * @param {Array} props The property names to get values for.
                         * @returns {Object} Returns the key-value pairs.
                         */
                        function baseToPairs(object, props) {
                            return arrayMap(props, function(key) {
                                return [key, object[key]];
                            });
                        }

                        /**
                         * The base implementation of `_.unary` without support for storing metadata.
                         *
                         * @private
                         * @param {Function} func The function to cap arguments for.
                         * @returns {Function} Returns the new capped function.
                         */
                        function baseUnary(func) {
                            return function(value) {
                                return func(value);
                            };
                        }

                        /**
                         * The base implementation of `_.values` and `_.valuesIn` which creates an
                         * array of `object` property values corresponding to the property names
                         * of `props`.
                         *
                         * @private
                         * @param {Object} object The object to query.
                         * @param {Array} props The property names to get values for.
                         * @returns {Object} Returns the array of property values.
                         */
                        function baseValues(object, props) {
                            return arrayMap(props, function(key) {
                                return object[key];
                            });
                        }

                        /**
                         * Checks if a `cache` value for `key` exists.
                         *
                         * @private
                         * @param {Object} cache The cache to query.
                         * @param {string} key The key of the entry to check.
                         * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
                         */
                        function cacheHas(cache, key) {
                            return cache.has(key);
                        }

                        /**
                         * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
                         * that is not found in the character symbols.
                         *
                         * @private
                         * @param {Array} strSymbols The string symbols to inspect.
                         * @param {Array} chrSymbols The character symbols to find.
                         * @returns {number} Returns the index of the first unmatched string symbol.
                         */
                        function charsStartIndex(strSymbols, chrSymbols) {
                            var index = -1,
                                length = strSymbols.length;

                            while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
                            return index;
                        }

                        /**
                         * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
                         * that is not found in the character symbols.
                         *
                         * @private
                         * @param {Array} strSymbols The string symbols to inspect.
                         * @param {Array} chrSymbols The character symbols to find.
                         * @returns {number} Returns the index of the last unmatched string symbol.
                         */
                        function charsEndIndex(strSymbols, chrSymbols) {
                            var index = strSymbols.length;

                            while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
                            return index;
                        }

                        /**
                         * Gets the number of `placeholder` occurrences in `array`.
                         *
                         * @private
                         * @param {Array} array The array to inspect.
                         * @param {*} placeholder The placeholder to search for.
                         * @returns {number} Returns the placeholder count.
                         */
                        function countHolders(array, placeholder) {
                            var length = array.length,
                                result = 0;

                            while (length--) {
                                if (array[length] === placeholder) {
                                    ++result;
                                }
                            }
                            return result;
                        }

                        /**
                         * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
                         * letters to basic Latin letters.
                         *
                         * @private
                         * @param {string} letter The matched letter to deburr.
                         * @returns {string} Returns the deburred letter.
                         */
                        var deburrLetter = basePropertyOf(deburredLetters);

                        /**
                         * Used by `_.escape` to convert characters to HTML entities.
                         *
                         * @private
                         * @param {string} chr The matched character to escape.
                         * @returns {string} Returns the escaped character.
                         */
                        var escapeHtmlChar = basePropertyOf(htmlEscapes);

                        /**
                         * Used by `_.template` to escape characters for inclusion in compiled string literals.
                         *
                         * @private
                         * @param {string} chr The matched character to escape.
                         * @returns {string} Returns the escaped character.
                         */
                        function escapeStringChar(chr) {
                            return '\\' + stringEscapes[chr];
                        }

                        /**
                         * Gets the value at `key` of `object`.
                         *
                         * @private
                         * @param {Object} [object] The object to query.
                         * @param {string} key The key of the property to get.
                         * @returns {*} Returns the property value.
                         */
                        function getValue(object, key) {
                            return object == null ? undefined : object[key];
                        }

                        /**
                         * Checks if `string` contains Unicode symbols.
                         *
                         * @private
                         * @param {string} string The string to inspect.
                         * @returns {boolean} Returns `true` if a symbol is found, else `false`.
                         */
                        function hasUnicode(string) {
                            return reHasUnicode.test(string);
                        }

                        /**
                         * Checks if `string` contains a word composed of Unicode symbols.
                         *
                         * @private
                         * @param {string} string The string to inspect.
                         * @returns {boolean} Returns `true` if a word is found, else `false`.
                         */
                        function hasUnicodeWord(string) {
                            return reHasUnicodeWord.test(string);
                        }

                        /**
                         * Converts `iterator` to an array.
                         *
                         * @private
                         * @param {Object} iterator The iterator to convert.
                         * @returns {Array} Returns the converted array.
                         */
                        function iteratorToArray(iterator) {
                            var data,
                                result = [];

                            while (!(data = iterator.next()).done) {
                                result.push(data.value);
                            }
                            return result;
                        }

                        /**
                         * Converts `map` to its key-value pairs.
                         *
                         * @private
                         * @param {Object} map The map to convert.
                         * @returns {Array} Returns the key-value pairs.
                         */
                        function mapToArray(map) {
                            var index = -1,
                                result = Array(map.size);

                            map.forEach(function(value, key) {
                                result[++index] = [key, value];
                            });
                            return result;
                        }

                        /**
                         * Creates a unary function that invokes `func` with its argument transformed.
                         *
                         * @private
                         * @param {Function} func The function to wrap.
                         * @param {Function} transform The argument transform.
                         * @returns {Function} Returns the new function.
                         */
                        function overArg(func, transform) {
                            return function(arg) {
                                return func(transform(arg));
                            };
                        }

                        /**
                         * Replaces all `placeholder` elements in `array` with an internal placeholder
                         * and returns an array of their indexes.
                         *
                         * @private
                         * @param {Array} array The array to modify.
                         * @param {*} placeholder The placeholder to replace.
                         * @returns {Array} Returns the new array of placeholder indexes.
                         */
                        function replaceHolders(array, placeholder) {
                            var index = -1,
                                length = array.length,
                                resIndex = 0,
                                result = [];

                            while (++index < length) {
                                var value = array[index];
                                if (value === placeholder || value === PLACEHOLDER) {
                                    array[index] = PLACEHOLDER;
                                    result[resIndex++] = index;
                                }
                            }
                            return result;
                        }

                        /**
                         * Converts `set` to an array of its values.
                         *
                         * @private
                         * @param {Object} set The set to convert.
                         * @returns {Array} Returns the values.
                         */
                        function setToArray(set) {
                            var index = -1,
                                result = Array(set.size);

                            set.forEach(function(value) {
                                result[++index] = value;
                            });
                            return result;
                        }

                        /**
                         * Converts `set` to its value-value pairs.
                         *
                         * @private
                         * @param {Object} set The set to convert.
                         * @returns {Array} Returns the value-value pairs.
                         */
                        function setToPairs(set) {
                            var index = -1,
                                result = Array(set.size);

                            set.forEach(function(value) {
                                result[++index] = [value, value];
                            });
                            return result;
                        }

                        /**
                         * A specialized version of `_.indexOf` which performs strict equality
                         * comparisons of values, i.e. `===`.
                         *
                         * @private
                         * @param {Array} array The array to inspect.
                         * @param {*} value The value to search for.
                         * @param {number} fromIndex The index to search from.
                         * @returns {number} Returns the index of the matched value, else `-1`.
                         */
                        function strictIndexOf(array, value, fromIndex) {
                            var index = fromIndex - 1,
                                length = array.length;

                            while (++index < length) {
                                if (array[index] === value) {
                                    return index;
                                }
                            }
                            return -1;
                        }

                        /**
                         * A specialized version of `_.lastIndexOf` which performs strict equality
                         * comparisons of values, i.e. `===`.
                         *
                         * @private
                         * @param {Array} array The array to inspect.
                         * @param {*} value The value to search for.
                         * @param {number} fromIndex The index to search from.
                         * @returns {number} Returns the index of the matched value, else `-1`.
                         */
                        function strictLastIndexOf(array, value, fromIndex) {
                            var index = fromIndex + 1;
                            while (index--) {
                                if (array[index] === value) {
                                    return index;
                                }
                            }
                            return index;
                        }

                        /**
                         * Gets the number of symbols in `string`.
                         *
                         * @private
                         * @param {string} string The string to inspect.
                         * @returns {number} Returns the string size.
                         */
                        function stringSize(string) {
                            return hasUnicode(string) ?
                                unicodeSize(string) :
                                asciiSize(string);
                        }

                        /**
                         * Converts `string` to an array.
                         *
                         * @private
                         * @param {string} string The string to convert.
                         * @returns {Array} Returns the converted array.
                         */
                        function stringToArray(string) {
                            return hasUnicode(string) ?
                                unicodeToArray(string) :
                                asciiToArray(string);
                        }

                        /**
                         * Used by `_.unescape` to convert HTML entities to characters.
                         *
                         * @private
                         * @param {string} chr The matched character to unescape.
                         * @returns {string} Returns the unescaped character.
                         */
                        var unescapeHtmlChar = basePropertyOf(htmlUnescapes);

                        /**
                         * Gets the size of a Unicode `string`.
                         *
                         * @private
                         * @param {string} string The string inspect.
                         * @returns {number} Returns the string size.
                         */
                        function unicodeSize(string) {
                            var result = reUnicode.lastIndex = 0;
                            while (reUnicode.test(string)) {
                                ++result;
                            }
                            return result;
                        }

                        /**
                         * Converts a Unicode `string` to an array.
                         *
                         * @private
                         * @param {string} string The string to convert.
                         * @returns {Array} Returns the converted array.
                         */
                        function unicodeToArray(string) {
                            return string.match(reUnicode) || [];
                        }

                        /**
                         * Splits a Unicode `string` into an array of its words.
                         *
                         * @private
                         * @param {string} The string to inspect.
                         * @returns {Array} Returns the words of `string`.
                         */
                        function unicodeWords(string) {
                            return string.match(reUnicodeWord) || [];
                        }

                        /*--------------------------------------------------------------------------*/

                        /**
                         * Create a new pristine `lodash` function using the `context` object.
                         *
                         * @static
                         * @memberOf _
                         * @since 1.1.0
                         * @category Util
                         * @param {Object} [context=root] The context object.
                         * @returns {Function} Returns a new `lodash` function.
                         * @example
                         *
                         * _.mixin({ 'foo': _.constant('foo') });
                         *
                         * var lodash = _.runInContext();
                         * lodash.mixin({ 'bar': lodash.constant('bar') });
                         *
                         * _.isFunction(_.foo);
                         * // => true
                         * _.isFunction(_.bar);
                         * // => false
                         *
                         * lodash.isFunction(lodash.foo);
                         * // => false
                         * lodash.isFunction(lodash.bar);
                         * // => true
                         *
                         * // Create a suped-up `defer` in Node.js.
                         * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
                         */
                        var runInContext = (function runInContext(context) {
                            context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));

                            /** Built-in constructor references. */
                            var Array = context.Array,
                                Date = context.Date,
                                Error = context.Error,
                                Function = context.Function,
                                Math = context.Math,
                                Object = context.Object,
                                RegExp = context.RegExp,
                                String = context.String,
                                TypeError = context.TypeError;

                            /** Used for built-in method references. */
                            var arrayProto = Array.prototype,
                                funcProto = Function.prototype,
                                objectProto = Object.prototype;

                            /** Used to detect overreaching core-js shims. */
                            var coreJsData = context['__core-js_shared__'];

                            /** Used to resolve the decompiled source of functions. */
                            var funcToString = funcProto.toString;

                            /** Used to check objects for own properties. */
                            var hasOwnProperty = objectProto.hasOwnProperty;

                            /** Used to generate unique IDs. */
                            var idCounter = 0;

                            /** Used to detect methods masquerading as native. */
                            var maskSrcKey = (function() {
                                var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
                                return uid ? ('Symbol(src)_1.' + uid) : '';
                            }());

                            /**
                             * Used to resolve the
                             * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
                             * of values.
                             */
                            var nativeObjectToString = objectProto.toString;

                            /** Used to infer the `Object` constructor. */
                            var objectCtorString = funcToString.call(Object);

                            /** Used to restore the original `_` reference in `_.noConflict`. */
                            var oldDash = root._;

                            /** Used to detect if a method is native. */
                            var reIsNative = RegExp('^' +
                                funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
                                .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
                            );

                            /** Built-in value references. */
                            var Buffer = moduleExports ? context.Buffer : undefined,
                                Symbol = context.Symbol,
                                Uint8Array = context.Uint8Array,
                                allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
                                getPrototype = overArg(Object.getPrototypeOf, Object),
                                objectCreate = Object.create,
                                propertyIsEnumerable = objectProto.propertyIsEnumerable,
                                splice = arrayProto.splice,
                                spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,
                                symIterator = Symbol ? Symbol.iterator : undefined,
                                symToStringTag = Symbol ? Symbol.toStringTag : undefined;

                            var defineProperty = (function() {
                                try {
                                    var func = getNative(Object, 'defineProperty');
                                    func({}, '', {});
                                    return func;
                                } catch (e) {}
                            }());

                            /** Mocked built-ins. */
                            var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
                                ctxNow = Date && Date.now !== root.Date.now && Date.now,
                                ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;

                            /* Built-in method references for those with the same name as other `lodash` methods. */
                            var nativeCeil = Math.ceil,
                                nativeFloor = Math.floor,
                                nativeGetSymbols = Object.getOwnPropertySymbols,
                                nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
                                nativeIsFinite = context.isFinite,
                                nativeJoin = arrayProto.join,
                                nativeKeys = overArg(Object.keys, Object),
                                nativeMax = Math.max,
                                nativeMin = Math.min,
                                nativeNow = Date.now,
                                nativeParseInt = context.parseInt,
                                nativeRandom = Math.random,
                                nativeReverse = arrayProto.reverse;

                            /* Built-in method references that are verified to be native. */
                            var DataView = getNative(context, 'DataView'),
                                Map = getNative(context, 'Map'),
                                Promise = getNative(context, 'Promise'),
                                Set = getNative(context, 'Set'),
                                WeakMap = getNative(context, 'WeakMap'),
                                nativeCreate = getNative(Object, 'create');

                            /** Used to store function metadata. */
                            var metaMap = WeakMap && new WeakMap;

                            /** Used to lookup unminified function names. */
                            var realNames = {};

                            /** Used to detect maps, sets, and weakmaps. */
                            var dataViewCtorString = toSource(DataView),
                                mapCtorString = toSource(Map),
                                promiseCtorString = toSource(Promise),
                                setCtorString = toSource(Set),
                                weakMapCtorString = toSource(WeakMap);

                            /** Used to convert symbols to primitives and strings. */
                            var symbolProto = Symbol ? Symbol.prototype : undefined,
                                symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
                                symbolToString = symbolProto ? symbolProto.toString : undefined;

                            /*------------------------------------------------------------------------*/

                            /**
                             * Creates a `lodash` object which wraps `value` to enable implicit method
                             * chain sequences. Methods that operate on and return arrays, collections,
                             * and functions can be chained together. Methods that retrieve a single value
                             * or may return a primitive value will automatically end the chain sequence
                             * and return the unwrapped value. Otherwise, the value must be unwrapped
                             * with `_#value`.
                             *
                             * Explicit chain sequences, which must be unwrapped with `_#value`, may be
                             * enabled using `_.chain`.
                             *
                             * The execution of chained methods is lazy, that is, it's deferred until
                             * `_#value` is implicitly or explicitly called.
                             *
                             * Lazy evaluation allows several methods to support shortcut fusion.
                             * Shortcut fusion is an optimization to merge iteratee calls; this avoids
                             * the creation of intermediate arrays and can greatly reduce the number of
                             * iteratee executions. Sections of a chain sequence qualify for shortcut
                             * fusion if the section is applied to an array and iteratees accept only
                             * one argument. The heuristic for whether a section qualifies for shortcut
                             * fusion is subject to change.
                             *
                             * Chaining is supported in custom builds as long as the `_#value` method is
                             * directly or indirectly included in the build.
                             *
                             * In addition to lodash methods, wrappers have `Array` and `String` methods.
                             *
                             * The wrapper `Array` methods are:
                             * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
                             *
                             * The wrapper `String` methods are:
                             * `replace` and `split`
                             *
                             * The wrapper methods that support shortcut fusion are:
                             * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
                             * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
                             * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
                             *
                             * The chainable wrapper methods are:
                             * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
                             * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
                             * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
                             * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
                             * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
                             * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
                             * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
                             * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
                             * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
                             * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
                             * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
                             * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
                             * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
                             * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
                             * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
                             * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
                             * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
                             * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
                             * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
                             * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
                             * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
                             * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
                             * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
                             * `zipObject`, `zipObjectDeep`, and `zipWith`
                             *
                             * The wrapper methods that are **not** chainable by default are:
                             * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
                             * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
                             * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
                             * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
                             * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
                             * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
                             * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
                             * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
                             * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
                             * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
                             * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
                             * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
                             * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
                             * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
                             * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
                             * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
                             * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
                             * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
                             * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
                             * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
                             * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
                             * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
                             * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
                             * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
                             * `upperFirst`, `value`, and `words`
                             *
                             * @name _
                             * @constructor
                             * @category Seq
                             * @param {*} value The value to wrap in a `lodash` instance.
                             * @returns {Object} Returns the new `lodash` wrapper instance.
                             * @example
                             *
                             * function square(n) {
                             *   return n * n;
                             * }
                             *
                             * var wrapped = _([1, 2, 3]);
                             *
                             * // Returns an unwrapped value.
                             * wrapped.reduce(_.add);
                             * // => 6
                             *
                             * // Returns a wrapped value.
                             * var squares = wrapped.map(square);
                             *
                             * _.isArray(squares);
                             * // => false
                             *
                             * _.isArray(squares.value());
                             * // => true
                             */
                            function lodash(value) {
                                if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
                                    if (value instanceof LodashWrapper) {
                                        return value;
                                    }
                                    if (hasOwnProperty.call(value, '__wrapped__')) {
                                        return wrapperClone(value);
                                    }
                                }
                                return new LodashWrapper(value);
                            }

                            /**
                             * The base implementation of `_.create` without support for assigning
                             * properties to the created object.
                             *
                             * @private
                             * @param {Object} proto The object to inherit from.
                             * @returns {Object} Returns the new object.
                             */
                            var baseCreate = (function() {
                                function object() {}
                                return function(proto) {
                                    if (!isObject(proto)) {
                                        return {};
                                    }
                                    if (objectCreate) {
                                        return objectCreate(proto);
                                    }
                                    object.prototype = proto;
                                    var result = new object;
                                    object.prototype = undefined;
                                    return result;
                                };
                            }());

                            /**
                             * The function whose prototype chain sequence wrappers inherit from.
                             *
                             * @private
                             */
                            function baseLodash() {
                                // No operation performed.
                            }

                            /**
                             * The base constructor for creating `lodash` wrapper objects.
                             *
                             * @private
                             * @param {*} value The value to wrap.
                             * @param {boolean} [chainAll] Enable explicit method chain sequences.
                             */
                            function LodashWrapper(value, chainAll) {
                                this.__wrapped__ = value;
                                this.__actions__ = [];
                                this.__chain__ = !!chainAll;
                                this.__index__ = 0;
                                this.__values__ = undefined;
                            }

                            /**
                             * By default, the template delimiters used by lodash are like those in
                             * embedded Ruby (ERB) as well as ES2015 template strings. Change the
                             * following template settings to use alternative delimiters.
                             *
                             * @static
                             * @memberOf _
                             * @type {Object}
                             */
                            lodash.templateSettings = {

                                /**
                                 * Used to detect `data` property values to be HTML-escaped.
                                 *
                                 * @memberOf _.templateSettings
                                 * @type {RegExp}
                                 */
                                'escape': reEscape,

                                /**
                                 * Used to detect code to be evaluated.
                                 *
                                 * @memberOf _.templateSettings
                                 * @type {RegExp}
                                 */
                                'evaluate': reEvaluate,

                                /**
                                 * Used to detect `data` property values to inject.
                                 *
                                 * @memberOf _.templateSettings
                                 * @type {RegExp}
                                 */
                                'interpolate': reInterpolate,

                                /**
                                 * Used to reference the data object in the template text.
                                 *
                                 * @memberOf _.templateSettings
                                 * @type {string}
                                 */
                                'variable': '',

                                /**
                                 * Used to import variables into the compiled template.
                                 *
                                 * @memberOf _.templateSettings
                                 * @type {Object}
                                 */
                                'imports': {

                                    /**
                                     * A reference to the `lodash` function.
                                     *
                                     * @memberOf _.templateSettings.imports
                                     * @type {Function}
                                     */
                                    '_': lodash
                                }
                            };

                            // Ensure wrappers are instances of `baseLodash`.
                            lodash.prototype = baseLodash.prototype;
                            lodash.prototype.constructor = lodash;

                            LodashWrapper.prototype = baseCreate(baseLodash.prototype);
                            LodashWrapper.prototype.constructor = LodashWrapper;

                            /*------------------------------------------------------------------------*/

                            /**
                             * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
                             *
                             * @private
                             * @constructor
                             * @param {*} value The value to wrap.
                             */
                            function LazyWrapper(value) {
                                this.__wrapped__ = value;
                                this.__actions__ = [];
                                this.__dir__ = 1;
                                this.__filtered__ = false;
                                this.__iteratees__ = [];
                                this.__takeCount__ = MAX_ARRAY_LENGTH;
                                this.__views__ = [];
                            }

                            /**
                             * Creates a clone of the lazy wrapper object.
                             *
                             * @private
                             * @name clone
                             * @memberOf LazyWrapper
                             * @returns {Object} Returns the cloned `LazyWrapper` object.
                             */
                            function lazyClone() {
                                var result = new LazyWrapper(this.__wrapped__);
                                result.__actions__ = copyArray(this.__actions__);
                                result.__dir__ = this.__dir__;
                                result.__filtered__ = this.__filtered__;
                                result.__iteratees__ = copyArray(this.__iteratees__);
                                result.__takeCount__ = this.__takeCount__;
                                result.__views__ = copyArray(this.__views__);
                                return result;
                            }

                            /**
                             * Reverses the direction of lazy iteration.
                             *
                             * @private
                             * @name reverse
                             * @memberOf LazyWrapper
                             * @returns {Object} Returns the new reversed `LazyWrapper` object.
                             */
                            function lazyReverse() {
                                if (this.__filtered__) {
                                    var result = new LazyWrapper(this);
                                    result.__dir__ = -1;
                                    result.__filtered__ = true;
                                } else {
                                    result = this.clone();
                                    result.__dir__ *= -1;
                                }
                                return result;
                            }

                            /**
                             * Extracts the unwrapped value from its lazy wrapper.
                             *
                             * @private
                             * @name value
                             * @memberOf LazyWrapper
                             * @returns {*} Returns the unwrapped value.
                             */
                            function lazyValue() {
                                var array = this.__wrapped__.value(),
                                    dir = this.__dir__,
                                    isArr = isArray(array),
                                    isRight = dir < 0,
                                    arrLength = isArr ? array.length : 0,
                                    view = getView(0, arrLength, this.__views__),
                                    start = view.start,
                                    end = view.end,
                                    length = end - start,
                                    index = isRight ? end : (start - 1),
                                    iteratees = this.__iteratees__,
                                    iterLength = iteratees.length,
                                    resIndex = 0,
                                    takeCount = nativeMin(length, this.__takeCount__);

                                if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
                                    return baseWrapperValue(array, this.__actions__);
                                }
                                var result = [];

                                outer:
                                    while (length-- && resIndex < takeCount) {
                                        index += dir;

                                        var iterIndex = -1,
                                            value = array[index];

                                        while (++iterIndex < iterLength) {
                                            var data = iteratees[iterIndex],
                                                iteratee = data.iteratee,
                                                type = data.type,
                                                computed = iteratee(value);

                                            if (type == LAZY_MAP_FLAG) {
                                                value = computed;
                                            } else if (!computed) {
                                                if (type == LAZY_FILTER_FLAG) {
                                                    continue outer;
                                                } else {
                                                    break outer;
                                                }
                                            }
                                        }
                                        result[resIndex++] = value;
                                    }
                                return result;
                            }

                            // Ensure `LazyWrapper` is an instance of `baseLodash`.
                            LazyWrapper.prototype = baseCreate(baseLodash.prototype);
                            LazyWrapper.prototype.constructor = LazyWrapper;

                            /*------------------------------------------------------------------------*/

                            /**
                             * Creates a hash object.
                             *
                             * @private
                             * @constructor
                             * @param {Array} [entries] The key-value pairs to cache.
                             */
                            function Hash(entries) {
                                var index = -1,
                                    length = entries == null ? 0 : entries.length;

                                this.clear();
                                while (++index < length) {
                                    var entry = entries[index];
                                    this.set(entry[0], entry[1]);
                                }
                            }

                            /**
                             * Removes all key-value entries from the hash.
                             *
                             * @private
                             * @name clear
                             * @memberOf Hash
                             */
                            function hashClear() {
                                this.__data__ = nativeCreate ? nativeCreate(null) : {};
                                this.size = 0;
                            }

                            /**
                             * Removes `key` and its value from the hash.
                             *
                             * @private
                             * @name delete
                             * @memberOf Hash
                             * @param {Object} hash The hash to modify.
                             * @param {string} key The key of the value to remove.
                             * @returns {boolean} Returns `true` if the entry was removed, else `false`.
                             */
                            function hashDelete(key) {
                                var result = this.has(key) && delete this.__data__[key];
                                this.size -= result ? 1 : 0;
                                return result;
                            }

                            /**
                             * Gets the hash value for `key`.
                             *
                             * @private
                             * @name get
                             * @memberOf Hash
                             * @param {string} key The key of the value to get.
                             * @returns {*} Returns the entry value.
                             */
                            function hashGet(key) {
                                var data = this.__data__;
                                if (nativeCreate) {
                                    var result = data[key];
                                    return result === HASH_UNDEFINED ? undefined : result;
                                }
                                return hasOwnProperty.call(data, key) ? data[key] : undefined;
                            }

                            /**
                             * Checks if a hash value for `key` exists.
                             *
                             * @private
                             * @name has
                             * @memberOf Hash
                             * @param {string} key The key of the entry to check.
                             * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
                             */
                            function hashHas(key) {
                                var data = this.__data__;
                                return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
                            }

                            /**
                             * Sets the hash `key` to `value`.
                             *
                             * @private
                             * @name set
                             * @memberOf Hash
                             * @param {string} key The key of the value to set.
                             * @param {*} value The value to set.
                             * @returns {Object} Returns the hash instance.
                             */
                            function hashSet(key, value) {
                                var data = this.__data__;
                                this.size += this.has(key) ? 0 : 1;
                                data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
                                return this;
                            }

                            // Add methods to `Hash`.
                            Hash.prototype.clear = hashClear;
                            Hash.prototype['delete'] = hashDelete;
                            Hash.prototype.get = hashGet;
                            Hash.prototype.has = hashHas;
                            Hash.prototype.set = hashSet;

                            /*------------------------------------------------------------------------*/

                            /**
                             * Creates an list cache object.
                             *
                             * @private
                             * @constructor
                             * @param {Array} [entries] The key-value pairs to cache.
                             */
                            function ListCache(entries) {
                                var index = -1,
                                    length = entries == null ? 0 : entries.length;

                                this.clear();
                                while (++index < length) {
                                    var entry = entries[index];
                                    this.set(entry[0], entry[1]);
                                }
                            }

                            /**
                             * Removes all key-value entries from the list cache.
                             *
                             * @private
                             * @name clear
                             * @memberOf ListCache
                             */
                            function listCacheClear() {
                                this.__data__ = [];
                                this.size = 0;
                            }

                            /**
                             * Removes `key` and its value from the list cache.
                             *
                             * @private
                             * @name delete
                             * @memberOf ListCache
                             * @param {string} key The key of the value to remove.
                             * @returns {boolean} Returns `true` if the entry was removed, else `false`.
                             */
                            function listCacheDelete(key) {
                                var data = this.__data__,
                                    index = assocIndexOf(data, key);

                                if (index < 0) {
                                    return false;
                                }
                                var lastIndex = data.length - 1;
                                if (index == lastIndex) {
                                    data.pop();
                                } else {
                                    splice.call(data, index, 1);
                                }
                                --this.size;
                                return true;
                            }

                            /**
                             * Gets the list cache value for `key`.
                             *
                             * @private
                             * @name get
                             * @memberOf ListCache
                             * @param {string} key The key of the value to get.
                             * @returns {*} Returns the entry value.
                             */
                            function listCacheGet(key) {
                                var data = this.__data__,
                                    index = assocIndexOf(data, key);

                                return index < 0 ? undefined : data[index][1];
                            }

                            /**
                             * Checks if a list cache value for `key` exists.
                             *
                             * @private
                             * @name has
                             * @memberOf ListCache
                             * @param {string} key The key of the entry to check.
                             * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
                             */
                            function listCacheHas(key) {
                                return assocIndexOf(this.__data__, key) > -1;
                            }

                            /**
                             * Sets the list cache `key` to `value`.
                             *
                             * @private
                             * @name set
                             * @memberOf ListCache
                             * @param {string} key The key of the value to set.
                             * @param {*} value The value to set.
                             * @returns {Object} Returns the list cache instance.
                             */
                            function listCacheSet(key, value) {
                                var data = this.__data__,
                                    index = assocIndexOf(data, key);

                                if (index < 0) {
                                    ++this.size;
                                    data.push([key, value]);
                                } else {
                                    data[index][1] = value;
                                }
                                return this;
                            }

                            // Add methods to `ListCache`.
                            ListCache.prototype.clear = listCacheClear;
                            ListCache.prototype['delete'] = listCacheDelete;
                            ListCache.prototype.get = listCacheGet;
                            ListCache.prototype.has = listCacheHas;
                            ListCache.prototype.set = listCacheSet;

                            /*------------------------------------------------------------------------*/

                            /**
                             * Creates a map cache object to store key-value pairs.
                             *
                             * @private
                             * @constructor
                             * @param {Array} [entries] The key-value pairs to cache.
                             */
                            function MapCache(entries) {
                                var index = -1,
                                    length = entries == null ? 0 : entries.length;

                                this.clear();
                                while (++index < length) {
                                    var entry = entries[index];
                                    this.set(entry[0], entry[1]);
                                }
                            }

                            /**
                             * Removes all key-value entries from the map.
                             *
                             * @private
                             * @name clear
                             * @memberOf MapCache
                             */
                            function mapCacheClear() {
                                this.size = 0;
                                this.__data__ = {
                                    'hash': new Hash,
                                    'map': new(Map || ListCache),
                                    'string': new Hash
                                };
                            }

                            /**
                             * Removes `key` and its value from the map.
                             *
                             * @private
                             * @name delete
                             * @memberOf MapCache
                             * @param {string} key The key of the value to remove.
                             * @returns {boolean} Returns `true` if the entry was removed, else `false`.
                             */
                            function mapCacheDelete(key) {
                                var result = getMapData(this, key)['delete'](key);
                                this.size -= result ? 1 : 0;
                                return result;
                            }

                            /**
                             * Gets the map value for `key`.
                             *
                             * @private
                             * @name get
                             * @memberOf MapCache
                             * @param {string} key The key of the value to get.
                             * @returns {*} Returns the entry value.
                             */
                            function mapCacheGet(key) {
                                return getMapData(this, key).get(key);
                            }

                            /**
                             * Checks if a map value for `key` exists.
                             *
                             * @private
                             * @name has
                             * @memberOf MapCache
                             * @param {string} key The key of the entry to check.
                             * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
                             */
                            function mapCacheHas(key) {
                                return getMapData(this, key).has(key);
                            }

                            /**
                             * Sets the map `key` to `value`.
                             *
                             * @private
                             * @name set
                             * @memberOf MapCache
                             * @param {string} key The key of the value to set.
                             * @param {*} value The value to set.
                             * @returns {Object} Returns the map cache instance.
                             */
                            function mapCacheSet(key, value) {
                                var data = getMapData(this, key),
                                    size = data.size;

                                data.set(key, value);
                                this.size += data.size == size ? 0 : 1;
                                return this;
                            }

                            // Add methods to `MapCache`.
                            MapCache.prototype.clear = mapCacheClear;
                            MapCache.prototype['delete'] = mapCacheDelete;
                            MapCache.prototype.get = mapCacheGet;
                            MapCache.prototype.has = mapCacheHas;
                            MapCache.prototype.set = mapCacheSet;

                            /*------------------------------------------------------------------------*/

                            /**
                             *
                             * Creates an array cache object to store unique values.
                             *
                             * @private
                             * @constructor
                             * @param {Array} [values] The values to cache.
                             */
                            function SetCache(values) {
                                var index = -1,
                                    length = values == null ? 0 : values.length;

                                this.__data__ = new MapCache;
                                while (++index < length) {
                                    this.add(values[index]);
                                }
                            }

                            /**
                             * Adds `value` to the array cache.
                             *
                             * @private
                             * @name add
                             * @memberOf SetCache
                             * @alias push
                             * @param {*} value The value to cache.
                             * @returns {Object} Returns the cache instance.
                             */
                            function setCacheAdd(value) {
                                this.__data__.set(value, HASH_UNDEFINED);
                                return this;
                            }

                            /**
                             * Checks if `value` is in the array cache.
                             *
                             * @private
                             * @name has
                             * @memberOf SetCache
                             * @param {*} value The value to search for.
                             * @returns {number} Returns `true` if `value` is found, else `false`.
                             */
                            function setCacheHas(value) {
                                return this.__data__.has(value);
                            }

                            // Add methods to `SetCache`.
                            SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
                            SetCache.prototype.has = setCacheHas;

                            /*------------------------------------------------------------------------*/

                            /**
                             * Creates a stack cache object to store key-value pairs.
                             *
                             * @private
                             * @constructor
                             * @param {Array} [entries] The key-value pairs to cache.
                             */
                            function Stack(entries) {
                                var data = this.__data__ = new ListCache(entries);
                                this.size = data.size;
                            }

                            /**
                             * Removes all key-value entries from the stack.
                             *
                             * @private
                             * @name clear
                             * @memberOf Stack
                             */
                            function stackClear() {
                                this.__data__ = new ListCache;
                                this.size = 0;
                            }

                            /**
                             * Removes `key` and its value from the stack.
                             *
                             * @private
                             * @name delete
                             * @memberOf Stack
                             * @param {string} key The key of the value to remove.
                             * @returns {boolean} Returns `true` if the entry was removed, else `false`.
                             */
                            function stackDelete(key) {
                                var data = this.__data__,
                                    result = data['delete'](key);

                                this.size = data.size;
                                return result;
                            }

                            /**
                             * Gets the stack value for `key`.
                             *
                             * @private
                             * @name get
                             * @memberOf Stack
                             * @param {string} key The key of the value to get.
                             * @returns {*} Returns the entry value.
                             */
                            function stackGet(key) {
                                return this.__data__.get(key);
                            }

                            /**
                             * Checks if a stack value for `key` exists.
                             *
                             * @private
                             * @name has
                             * @memberOf Stack
                             * @param {string} key The key of the entry to check.
                             * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
                             */
                            function stackHas(key) {
                                return this.__data__.has(key);
                            }

                            /**
                             * Sets the stack `key` to `value`.
                             *
                             * @private
                             * @name set
                             * @memberOf Stack
                             * @param {string} key The key of the value to set.
                             * @param {*} value The value to set.
                             * @returns {Object} Returns the stack cache instance.
                             */
                            function stackSet(key, value) {
                                var data = this.__data__;
                                if (data instanceof ListCache) {
                                    var pairs = data.__data__;
                                    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
                                        pairs.push([key, value]);
                                        this.size = ++data.size;
                                        return this;
                                    }
                                    data = this.__data__ = new MapCache(pairs);
                                }
                                data.set(key, value);
                                this.size = data.size;
                                return this;
                            }

                            // Add methods to `Stack`.
                            Stack.prototype.clear = stackClear;
                            Stack.prototype['delete'] = stackDelete;
                            Stack.prototype.get = stackGet;
                            Stack.prototype.has = stackHas;
                            Stack.prototype.set = stackSet;

                            /*------------------------------------------------------------------------*/

                            /**
                             * Creates an array of the enumerable property names of the array-like `value`.
                             *
                             * @private
                             * @param {*} value The value to query.
                             * @param {boolean} inherited Specify returning inherited property names.
                             * @returns {Array} Returns the array of property names.
                             */
                            function arrayLikeKeys(value, inherited) {
                                var isArr = isArray(value),
                                    isArg = !isArr && isArguments(value),
                                    isBuff = !isArr && !isArg && isBuffer(value),
                                    isType = !isArr && !isArg && !isBuff && isTypedArray(value),
                                    skipIndexes = isArr || isArg || isBuff || isType,
                                    result = skipIndexes ? baseTimes(value.length, String) : [],
                                    length = result.length;

                                for (var key in value) {
                                    if ((inherited || hasOwnProperty.call(value, key)) &&
                                        !(skipIndexes && (
                                            // Safari 9 has enumerable `arguments.length` in strict mode.
                                            key == 'length' ||
                                            // Node.js 0.10 has enumerable non-index properties on buffers.
                                            (isBuff && (key == 'offset' || key == 'parent')) ||
                                            // PhantomJS 2 has enumerable non-index properties on typed arrays.
                                            (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
                                            // Skip index properties.
                                            isIndex(key, length)
                                        ))) {
                                        result.push(key);
                                    }
                                }
                                return result;
                            }

                            /**
                             * A specialized version of `_.sample` for arrays.
                             *
                             * @private
                             * @param {Array} array The array to sample.
                             * @returns {*} Returns the random element.
                             */
                            function arraySample(array) {
                                var length = array.length;
                                return length ? array[baseRandom(0, length - 1)] : undefined;
                            }

                            /**
                             * A specialized version of `_.sampleSize` for arrays.
                             *
                             * @private
                             * @param {Array} array The array to sample.
                             * @param {number} n The number of elements to sample.
                             * @returns {Array} Returns the random elements.
                             */
                            function arraySampleSize(array, n) {
                                return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
                            }

                            /**
                             * A specialized version of `_.shuffle` for arrays.
                             *
                             * @private
                             * @param {Array} array The array to shuffle.
                             * @returns {Array} Returns the new shuffled array.
                             */
                            function arrayShuffle(array) {
                                return shuffleSelf(copyArray(array));
                            }

                            /**
                             * This function is like `assignValue` except that it doesn't assign
                             * `undefined` values.
                             *
                             * @private
                             * @param {Object} object The object to modify.
                             * @param {string} key The key of the property to assign.
                             * @param {*} value The value to assign.
                             */
                            function assignMergeValue(object, key, value) {
                                if ((value !== undefined && !eq(object[key], value)) ||
                                    (value === undefined && !(key in object))) {
                                    baseAssignValue(object, key, value);
                                }
                            }

                            /**
                             * Assigns `value` to `key` of `object` if the existing value is not equivalent
                             * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
                             * for equality comparisons.
                             *
                             * @private
                             * @param {Object} object The object to modify.
                             * @param {string} key The key of the property to assign.
                             * @param {*} value The value to assign.
                             */
                            function assignValue(object, key, value) {
                                var objValue = object[key];
                                if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
                                    (value === undefined && !(key in object))) {
                                    baseAssignValue(object, key, value);
                                }
                            }

                            /**
                             * Gets the index at which the `key` is found in `array` of key-value pairs.
                             *
                             * @private
                             * @param {Array} array The array to inspect.
                             * @param {*} key The key to search for.
                             * @returns {number} Returns the index of the matched value, else `-1`.
                             */
                            function assocIndexOf(array, key) {
                                var length = array.length;
                                while (length--) {
                                    if (eq(array[length][0], key)) {
                                        return length;
                                    }
                                }
                                return -1;
                            }

                            /**
                             * Aggregates elements of `collection` on `accumulator` with keys transformed
                             * by `iteratee` and values set by `setter`.
                             *
                             * @private
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} setter The function to set `accumulator` values.
                             * @param {Function} iteratee The iteratee to transform keys.
                             * @param {Object} accumulator The initial aggregated object.
                             * @returns {Function} Returns `accumulator`.
                             */
                            function baseAggregator(collection, setter, iteratee, accumulator) {
                                baseEach(collection, function(value, key, collection) {
                                    setter(accumulator, value, iteratee(value), collection);
                                });
                                return accumulator;
                            }

                            /**
                             * The base implementation of `_.assign` without support for multiple sources
                             * or `customizer` functions.
                             *
                             * @private
                             * @param {Object} object The destination object.
                             * @param {Object} source The source object.
                             * @returns {Object} Returns `object`.
                             */
                            function baseAssign(object, source) {
                                return object && copyObject(source, keys(source), object);
                            }

                            /**
                             * The base implementation of `_.assignIn` without support for multiple sources
                             * or `customizer` functions.
                             *
                             * @private
                             * @param {Object} object The destination object.
                             * @param {Object} source The source object.
                             * @returns {Object} Returns `object`.
                             */
                            function baseAssignIn(object, source) {
                                return object && copyObject(source, keysIn(source), object);
                            }

                            /**
                             * The base implementation of `assignValue` and `assignMergeValue` without
                             * value checks.
                             *
                             * @private
                             * @param {Object} object The object to modify.
                             * @param {string} key The key of the property to assign.
                             * @param {*} value The value to assign.
                             */
                            function baseAssignValue(object, key, value) {
                                if (key == '__proto__' && defineProperty) {
                                    defineProperty(object, key, {
                                        'configurable': true,
                                        'enumerable': true,
                                        'value': value,
                                        'writable': true
                                    });
                                } else {
                                    object[key] = value;
                                }
                            }

                            /**
                             * The base implementation of `_.at` without support for individual paths.
                             *
                             * @private
                             * @param {Object} object The object to iterate over.
                             * @param {string[]} paths The property paths to pick.
                             * @returns {Array} Returns the picked elements.
                             */
                            function baseAt(object, paths) {
                                var index = -1,
                                    length = paths.length,
                                    result = Array(length),
                                    skip = object == null;

                                while (++index < length) {
                                    result[index] = skip ? undefined : get(object, paths[index]);
                                }
                                return result;
                            }

                            /**
                             * The base implementation of `_.clamp` which doesn't coerce arguments.
                             *
                             * @private
                             * @param {number} number The number to clamp.
                             * @param {number} [lower] The lower bound.
                             * @param {number} upper The upper bound.
                             * @returns {number} Returns the clamped number.
                             */
                            function baseClamp(number, lower, upper) {
                                if (number === number) {
                                    if (upper !== undefined) {
                                        number = number <= upper ? number : upper;
                                    }
                                    if (lower !== undefined) {
                                        number = number >= lower ? number : lower;
                                    }
                                }
                                return number;
                            }

                            /**
                             * The base implementation of `_.clone` and `_.cloneDeep` which tracks
                             * traversed objects.
                             *
                             * @private
                             * @param {*} value The value to clone.
                             * @param {boolean} bitmask The bitmask flags.
                             *  1 - Deep clone
                             *  2 - Flatten inherited properties
                             *  4 - Clone symbols
                             * @param {Function} [customizer] The function to customize cloning.
                             * @param {string} [key] The key of `value`.
                             * @param {Object} [object] The parent object of `value`.
                             * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
                             * @returns {*} Returns the cloned value.
                             */
                            function baseClone(value, bitmask, customizer, key, object, stack) {
                                var result,
                                    isDeep = bitmask & CLONE_DEEP_FLAG,
                                    isFlat = bitmask & CLONE_FLAT_FLAG,
                                    isFull = bitmask & CLONE_SYMBOLS_FLAG;

                                if (customizer) {
                                    result = object ? customizer(value, key, object, stack) : customizer(value);
                                }
                                if (result !== undefined) {
                                    return result;
                                }
                                if (!isObject(value)) {
                                    return value;
                                }
                                var isArr = isArray(value);
                                if (isArr) {
                                    result = initCloneArray(value);
                                    if (!isDeep) {
                                        return copyArray(value, result);
                                    }
                                } else {
                                    var tag = getTag(value),
                                        isFunc = tag == funcTag || tag == genTag;

                                    if (isBuffer(value)) {
                                        return cloneBuffer(value, isDeep);
                                    }
                                    if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
                                        result = (isFlat || isFunc) ? {} : initCloneObject(value);
                                        if (!isDeep) {
                                            return isFlat ?
                                                copySymbolsIn(value, baseAssignIn(result, value)) :
                                                copySymbols(value, baseAssign(result, value));
                                        }
                                    } else {
                                        if (!cloneableTags[tag]) {
                                            return object ? value : {};
                                        }
                                        result = initCloneByTag(value, tag, baseClone, isDeep);
                                    }
                                }
                                // Check for circular references and return its corresponding clone.
                                stack || (stack = new Stack);
                                var stacked = stack.get(value);
                                if (stacked) {
                                    return stacked;
                                }
                                stack.set(value, result);

                                var keysFunc = isFull ?
                                    (isFlat ? getAllKeysIn : getAllKeys) :
                                    (isFlat ? keysIn : keys);

                                var props = isArr ? undefined : keysFunc(value);
                                arrayEach(props || value, function(subValue, key) {
                                    if (props) {
                                        key = subValue;
                                        subValue = value[key];
                                    }
                                    // Recursively populate clone (susceptible to call stack limits).
                                    assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
                                });
                                return result;
                            }

                            /**
                             * The base implementation of `_.conforms` which doesn't clone `source`.
                             *
                             * @private
                             * @param {Object} source The object of property predicates to conform to.
                             * @returns {Function} Returns the new spec function.
                             */
                            function baseConforms(source) {
                                var props = keys(source);
                                return function(object) {
                                    return baseConformsTo(object, source, props);
                                };
                            }

                            /**
                             * The base implementation of `_.conformsTo` which accepts `props` to check.
                             *
                             * @private
                             * @param {Object} object The object to inspect.
                             * @param {Object} source The object of property predicates to conform to.
                             * @returns {boolean} Returns `true` if `object` conforms, else `false`.
                             */
                            function baseConformsTo(object, source, props) {
                                var length = props.length;
                                if (object == null) {
                                    return !length;
                                }
                                object = Object(object);
                                while (length--) {
                                    var key = props[length],
                                        predicate = source[key],
                                        value = object[key];

                                    if ((value === undefined && !(key in object)) || !predicate(value)) {
                                        return false;
                                    }
                                }
                                return true;
                            }

                            /**
                             * The base implementation of `_.delay` and `_.defer` which accepts `args`
                             * to provide to `func`.
                             *
                             * @private
                             * @param {Function} func The function to delay.
                             * @param {number} wait The number of milliseconds to delay invocation.
                             * @param {Array} args The arguments to provide to `func`.
                             * @returns {number|Object} Returns the timer id or timeout object.
                             */
                            function baseDelay(func, wait, args) {
                                if (typeof func != 'function') {
                                    throw new TypeError(FUNC_ERROR_TEXT);
                                }
                                return setTimeout(function() { func.apply(undefined, args); }, wait);
                            }

                            /**
                             * The base implementation of methods like `_.difference` without support
                             * for excluding multiple arrays or iteratee shorthands.
                             *
                             * @private
                             * @param {Array} array The array to inspect.
                             * @param {Array} values The values to exclude.
                             * @param {Function} [iteratee] The iteratee invoked per element.
                             * @param {Function} [comparator] The comparator invoked per element.
                             * @returns {Array} Returns the new array of filtered values.
                             */
                            function baseDifference(array, values, iteratee, comparator) {
                                var index = -1,
                                    includes = arrayIncludes,
                                    isCommon = true,
                                    length = array.length,
                                    result = [],
                                    valuesLength = values.length;

                                if (!length) {
                                    return result;
                                }
                                if (iteratee) {
                                    values = arrayMap(values, baseUnary(iteratee));
                                }
                                if (comparator) {
                                    includes = arrayIncludesWith;
                                    isCommon = false;
                                } else if (values.length >= LARGE_ARRAY_SIZE) {
                                    includes = cacheHas;
                                    isCommon = false;
                                    values = new SetCache(values);
                                }
                                outer:
                                    while (++index < length) {
                                        var value = array[index],
                                            computed = iteratee == null ? value : iteratee(value);

                                        value = (comparator || value !== 0) ? value : 0;
                                        if (isCommon && computed === computed) {
                                            var valuesIndex = valuesLength;
                                            while (valuesIndex--) {
                                                if (values[valuesIndex] === computed) {
                                                    continue outer;
                                                }
                                            }
                                            result.push(value);
                                        } else if (!includes(values, computed, comparator)) {
                                            result.push(value);
                                        }
                                    }
                                return result;
                            }

                            /**
                             * The base implementation of `_.forEach` without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} iteratee The function invoked per iteration.
                             * @returns {Array|Object} Returns `collection`.
                             */
                            var baseEach = createBaseEach(baseForOwn);

                            /**
                             * The base implementation of `_.forEachRight` without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} iteratee The function invoked per iteration.
                             * @returns {Array|Object} Returns `collection`.
                             */
                            var baseEachRight = createBaseEach(baseForOwnRight, true);

                            /**
                             * The base implementation of `_.every` without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} predicate The function invoked per iteration.
                             * @returns {boolean} Returns `true` if all elements pass the predicate check,
                             *  else `false`
                             */
                            function baseEvery(collection, predicate) {
                                var result = true;
                                baseEach(collection, function(value, index, collection) {
                                    result = !!predicate(value, index, collection);
                                    return result;
                                });
                                return result;
                            }

                            /**
                             * The base implementation of methods like `_.max` and `_.min` which accepts a
                             * `comparator` to determine the extremum value.
                             *
                             * @private
                             * @param {Array} array The array to iterate over.
                             * @param {Function} iteratee The iteratee invoked per iteration.
                             * @param {Function} comparator The comparator used to compare values.
                             * @returns {*} Returns the extremum value.
                             */
                            function baseExtremum(array, iteratee, comparator) {
                                var index = -1,
                                    length = array.length;

                                while (++index < length) {
                                    var value = array[index],
                                        current = iteratee(value);

                                    if (current != null && (computed === undefined ?
                                            (current === current && !isSymbol(current)) :
                                            comparator(current, computed)
                                        )) {
                                        var computed = current,
                                            result = value;
                                    }
                                }
                                return result;
                            }

                            /**
                             * The base implementation of `_.fill` without an iteratee call guard.
                             *
                             * @private
                             * @param {Array} array The array to fill.
                             * @param {*} value The value to fill `array` with.
                             * @param {number} [start=0] The start position.
                             * @param {number} [end=array.length] The end position.
                             * @returns {Array} Returns `array`.
                             */
                            function baseFill(array, value, start, end) {
                                var length = array.length;

                                start = toInteger(start);
                                if (start < 0) {
                                    start = -start > length ? 0 : (length + start);
                                }
                                end = (end === undefined || end > length) ? length : toInteger(end);
                                if (end < 0) {
                                    end += length;
                                }
                                end = start > end ? 0 : toLength(end);
                                while (start < end) {
                                    array[start++] = value;
                                }
                                return array;
                            }

                            /**
                             * The base implementation of `_.filter` without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} predicate The function invoked per iteration.
                             * @returns {Array} Returns the new filtered array.
                             */
                            function baseFilter(collection, predicate) {
                                var result = [];
                                baseEach(collection, function(value, index, collection) {
                                    if (predicate(value, index, collection)) {
                                        result.push(value);
                                    }
                                });
                                return result;
                            }

                            /**
                             * The base implementation of `_.flatten` with support for restricting flattening.
                             *
                             * @private
                             * @param {Array} array The array to flatten.
                             * @param {number} depth The maximum recursion depth.
                             * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
                             * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
                             * @param {Array} [result=[]] The initial result value.
                             * @returns {Array} Returns the new flattened array.
                             */
                            function baseFlatten(array, depth, predicate, isStrict, result) {
                                var index = -1,
                                    length = array.length;

                                predicate || (predicate = isFlattenable);
                                result || (result = []);

                                while (++index < length) {
                                    var value = array[index];
                                    if (depth > 0 && predicate(value)) {
                                        if (depth > 1) {
                                            // Recursively flatten arrays (susceptible to call stack limits).
                                            baseFlatten(value, depth - 1, predicate, isStrict, result);
                                        } else {
                                            arrayPush(result, value);
                                        }
                                    } else if (!isStrict) {
                                        result[result.length] = value;
                                    }
                                }
                                return result;
                            }

                            /**
                             * The base implementation of `baseForOwn` which iterates over `object`
                             * properties returned by `keysFunc` and invokes `iteratee` for each property.
                             * Iteratee functions may exit iteration early by explicitly returning `false`.
                             *
                             * @private
                             * @param {Object} object The object to iterate over.
                             * @param {Function} iteratee The function invoked per iteration.
                             * @param {Function} keysFunc The function to get the keys of `object`.
                             * @returns {Object} Returns `object`.
                             */
                            var baseFor = createBaseFor();

                            /**
                             * This function is like `baseFor` except that it iterates over properties
                             * in the opposite order.
                             *
                             * @private
                             * @param {Object} object The object to iterate over.
                             * @param {Function} iteratee The function invoked per iteration.
                             * @param {Function} keysFunc The function to get the keys of `object`.
                             * @returns {Object} Returns `object`.
                             */
                            var baseForRight = createBaseFor(true);

                            /**
                             * The base implementation of `_.forOwn` without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Object} object The object to iterate over.
                             * @param {Function} iteratee The function invoked per iteration.
                             * @returns {Object} Returns `object`.
                             */
                            function baseForOwn(object, iteratee) {
                                return object && baseFor(object, iteratee, keys);
                            }

                            /**
                             * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Object} object The object to iterate over.
                             * @param {Function} iteratee The function invoked per iteration.
                             * @returns {Object} Returns `object`.
                             */
                            function baseForOwnRight(object, iteratee) {
                                return object && baseForRight(object, iteratee, keys);
                            }

                            /**
                             * The base implementation of `_.functions` which creates an array of
                             * `object` function property names filtered from `props`.
                             *
                             * @private
                             * @param {Object} object The object to inspect.
                             * @param {Array} props The property names to filter.
                             * @returns {Array} Returns the function names.
                             */
                            function baseFunctions(object, props) {
                                return arrayFilter(props, function(key) {
                                    return isFunction(object[key]);
                                });
                            }

                            /**
                             * The base implementation of `_.get` without support for default values.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @param {Array|string} path The path of the property to get.
                             * @returns {*} Returns the resolved value.
                             */
                            function baseGet(object, path) {
                                path = castPath(path, object);

                                var index = 0,
                                    length = path.length;

                                while (object != null && index < length) {
                                    object = object[toKey(path[index++])];
                                }
                                return (index && index == length) ? object : undefined;
                            }

                            /**
                             * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
                             * `keysFunc` and `symbolsFunc` to get the enumerable property names and
                             * symbols of `object`.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @param {Function} keysFunc The function to get the keys of `object`.
                             * @param {Function} symbolsFunc The function to get the symbols of `object`.
                             * @returns {Array} Returns the array of property names and symbols.
                             */
                            function baseGetAllKeys(object, keysFunc, symbolsFunc) {
                                var result = keysFunc(object);
                                return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
                            }

                            /**
                             * The base implementation of `getTag` without fallbacks for buggy environments.
                             *
                             * @private
                             * @param {*} value The value to query.
                             * @returns {string} Returns the `toStringTag`.
                             */
                            function baseGetTag(value) {
                                if (value == null) {
                                    return value === undefined ? undefinedTag : nullTag;
                                }
                                return (symToStringTag && symToStringTag in Object(value)) ?
                                    getRawTag(value) :
                                    objectToString(value);
                            }

                            /**
                             * The base implementation of `_.gt` which doesn't coerce arguments.
                             *
                             * @private
                             * @param {*} value The value to compare.
                             * @param {*} other The other value to compare.
                             * @returns {boolean} Returns `true` if `value` is greater than `other`,
                             *  else `false`.
                             */
                            function baseGt(value, other) {
                                return value > other;
                            }

                            /**
                             * The base implementation of `_.has` without support for deep paths.
                             *
                             * @private
                             * @param {Object} [object] The object to query.
                             * @param {Array|string} key The key to check.
                             * @returns {boolean} Returns `true` if `key` exists, else `false`.
                             */
                            function baseHas(object, key) {
                                return object != null && hasOwnProperty.call(object, key);
                            }

                            /**
                             * The base implementation of `_.hasIn` without support for deep paths.
                             *
                             * @private
                             * @param {Object} [object] The object to query.
                             * @param {Array|string} key The key to check.
                             * @returns {boolean} Returns `true` if `key` exists, else `false`.
                             */
                            function baseHasIn(object, key) {
                                return object != null && key in Object(object);
                            }

                            /**
                             * The base implementation of `_.inRange` which doesn't coerce arguments.
                             *
                             * @private
                             * @param {number} number The number to check.
                             * @param {number} start The start of the range.
                             * @param {number} end The end of the range.
                             * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
                             */
                            function baseInRange(number, start, end) {
                                return number >= nativeMin(start, end) && number < nativeMax(start, end);
                            }

                            /**
                             * The base implementation of methods like `_.intersection`, without support
                             * for iteratee shorthands, that accepts an array of arrays to inspect.
                             *
                             * @private
                             * @param {Array} arrays The arrays to inspect.
                             * @param {Function} [iteratee] The iteratee invoked per element.
                             * @param {Function} [comparator] The comparator invoked per element.
                             * @returns {Array} Returns the new array of shared values.
                             */
                            function baseIntersection(arrays, iteratee, comparator) {
                                var includes = comparator ? arrayIncludesWith : arrayIncludes,
                                    length = arrays[0].length,
                                    othLength = arrays.length,
                                    othIndex = othLength,
                                    caches = Array(othLength),
                                    maxLength = Infinity,
                                    result = [];

                                while (othIndex--) {
                                    var array = arrays[othIndex];
                                    if (othIndex && iteratee) {
                                        array = arrayMap(array, baseUnary(iteratee));
                                    }
                                    maxLength = nativeMin(array.length, maxLength);
                                    caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120)) ?
                                        new SetCache(othIndex && array) :
                                        undefined;
                                }
                                array = arrays[0];

                                var index = -1,
                                    seen = caches[0];

                                outer:
                                    while (++index < length && result.length < maxLength) {
                                        var value = array[index],
                                            computed = iteratee ? iteratee(value) : value;

                                        value = (comparator || value !== 0) ? value : 0;
                                        if (!(seen ?
                                                cacheHas(seen, computed) :
                                                includes(result, computed, comparator)
                                            )) {
                                            othIndex = othLength;
                                            while (--othIndex) {
                                                var cache = caches[othIndex];
                                                if (!(cache ?
                                                        cacheHas(cache, computed) :
                                                        includes(arrays[othIndex], computed, comparator))) {
                                                    continue outer;
                                                }
                                            }
                                            if (seen) {
                                                seen.push(computed);
                                            }
                                            result.push(value);
                                        }
                                    }
                                return result;
                            }

                            /**
                             * The base implementation of `_.invert` and `_.invertBy` which inverts
                             * `object` with values transformed by `iteratee` and set by `setter`.
                             *
                             * @private
                             * @param {Object} object The object to iterate over.
                             * @param {Function} setter The function to set `accumulator` values.
                             * @param {Function} iteratee The iteratee to transform values.
                             * @param {Object} accumulator The initial inverted object.
                             * @returns {Function} Returns `accumulator`.
                             */
                            function baseInverter(object, setter, iteratee, accumulator) {
                                baseForOwn(object, function(value, key, object) {
                                    setter(accumulator, iteratee(value), key, object);
                                });
                                return accumulator;
                            }

                            /**
                             * The base implementation of `_.invoke` without support for individual
                             * method arguments.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @param {Array|string} path The path of the method to invoke.
                             * @param {Array} args The arguments to invoke the method with.
                             * @returns {*} Returns the result of the invoked method.
                             */
                            function baseInvoke(object, path, args) {
                                path = castPath(path, object);
                                object = parent(object, path);
                                var func = object == null ? object : object[toKey(last(path))];
                                return func == null ? undefined : apply(func, object, args);
                            }

                            /**
                             * The base implementation of `_.isArguments`.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is an `arguments` object,
                             */
                            function baseIsArguments(value) {
                                return isObjectLike(value) && baseGetTag(value) == argsTag;
                            }

                            /**
                             * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
                             */
                            function baseIsArrayBuffer(value) {
                                return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
                            }

                            /**
                             * The base implementation of `_.isDate` without Node.js optimizations.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
                             */
                            function baseIsDate(value) {
                                return isObjectLike(value) && baseGetTag(value) == dateTag;
                            }

                            /**
                             * The base implementation of `_.isEqual` which supports partial comparisons
                             * and tracks traversed objects.
                             *
                             * @private
                             * @param {*} value The value to compare.
                             * @param {*} other The other value to compare.
                             * @param {boolean} bitmask The bitmask flags.
                             *  1 - Unordered comparison
                             *  2 - Partial comparison
                             * @param {Function} [customizer] The function to customize comparisons.
                             * @param {Object} [stack] Tracks traversed `value` and `other` objects.
                             * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
                             */
                            function baseIsEqual(value, other, bitmask, customizer, stack) {
                                if (value === other) {
                                    return true;
                                }
                                if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
                                    return value !== value && other !== other;
                                }
                                return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
                            }

                            /**
                             * A specialized version of `baseIsEqual` for arrays and objects which performs
                             * deep comparisons and tracks traversed objects enabling objects with circular
                             * references to be compared.
                             *
                             * @private
                             * @param {Object} object The object to compare.
                             * @param {Object} other The other object to compare.
                             * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
                             * @param {Function} customizer The function to customize comparisons.
                             * @param {Function} equalFunc The function to determine equivalents of values.
                             * @param {Object} [stack] Tracks traversed `object` and `other` objects.
                             * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
                             */
                            function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
                                var objIsArr = isArray(object),
                                    othIsArr = isArray(other),
                                    objTag = objIsArr ? arrayTag : getTag(object),
                                    othTag = othIsArr ? arrayTag : getTag(other);

                                objTag = objTag == argsTag ? objectTag : objTag;
                                othTag = othTag == argsTag ? objectTag : othTag;

                                var objIsObj = objTag == objectTag,
                                    othIsObj = othTag == objectTag,
                                    isSameTag = objTag == othTag;

                                if (isSameTag && isBuffer(object)) {
                                    if (!isBuffer(other)) {
                                        return false;
                                    }
                                    objIsArr = true;
                                    objIsObj = false;
                                }
                                if (isSameTag && !objIsObj) {
                                    stack || (stack = new Stack);
                                    return (objIsArr || isTypedArray(object)) ?
                                        equalArrays(object, other, bitmask, customizer, equalFunc, stack) :
                                        equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
                                }
                                if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
                                    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
                                        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');

                                    if (objIsWrapped || othIsWrapped) {
                                        var objUnwrapped = objIsWrapped ? object.value() : object,
                                            othUnwrapped = othIsWrapped ? other.value() : other;

                                        stack || (stack = new Stack);
                                        return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
                                    }
                                }
                                if (!isSameTag) {
                                    return false;
                                }
                                stack || (stack = new Stack);
                                return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
                            }

                            /**
                             * The base implementation of `_.isMap` without Node.js optimizations.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a map, else `false`.
                             */
                            function baseIsMap(value) {
                                return isObjectLike(value) && getTag(value) == mapTag;
                            }

                            /**
                             * The base implementation of `_.isMatch` without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Object} object The object to inspect.
                             * @param {Object} source The object of property values to match.
                             * @param {Array} matchData The property names, values, and compare flags to match.
                             * @param {Function} [customizer] The function to customize comparisons.
                             * @returns {boolean} Returns `true` if `object` is a match, else `false`.
                             */
                            function baseIsMatch(object, source, matchData, customizer) {
                                var index = matchData.length,
                                    length = index,
                                    noCustomizer = !customizer;

                                if (object == null) {
                                    return !length;
                                }
                                object = Object(object);
                                while (index--) {
                                    var data = matchData[index];
                                    if ((noCustomizer && data[2]) ?
                                        data[1] !== object[data[0]] :
                                        !(data[0] in object)
                                    ) {
                                        return false;
                                    }
                                }
                                while (++index < length) {
                                    data = matchData[index];
                                    var key = data[0],
                                        objValue = object[key],
                                        srcValue = data[1];

                                    if (noCustomizer && data[2]) {
                                        if (objValue === undefined && !(key in object)) {
                                            return false;
                                        }
                                    } else {
                                        var stack = new Stack;
                                        if (customizer) {
                                            var result = customizer(objValue, srcValue, key, object, source, stack);
                                        }
                                        if (!(result === undefined ?
                                                baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack) :
                                                result
                                            )) {
                                            return false;
                                        }
                                    }
                                }
                                return true;
                            }

                            /**
                             * The base implementation of `_.isNative` without bad shim checks.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a native function,
                             *  else `false`.
                             */
                            function baseIsNative(value) {
                                if (!isObject(value) || isMasked(value)) {
                                    return false;
                                }
                                var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
                                return pattern.test(toSource(value));
                            }

                            /**
                             * The base implementation of `_.isRegExp` without Node.js optimizations.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
                             */
                            function baseIsRegExp(value) {
                                return isObjectLike(value) && baseGetTag(value) == regexpTag;
                            }

                            /**
                             * The base implementation of `_.isSet` without Node.js optimizations.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a set, else `false`.
                             */
                            function baseIsSet(value) {
                                return isObjectLike(value) && getTag(value) == setTag;
                            }

                            /**
                             * The base implementation of `_.isTypedArray` without Node.js optimizations.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
                             */
                            function baseIsTypedArray(value) {
                                return isObjectLike(value) &&
                                    isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
                            }

                            /**
                             * The base implementation of `_.iteratee`.
                             *
                             * @private
                             * @param {*} [value=_.identity] The value to convert to an iteratee.
                             * @returns {Function} Returns the iteratee.
                             */
                            function baseIteratee(value) {
                                // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
                                // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
                                if (typeof value == 'function') {
                                    return value;
                                }
                                if (value == null) {
                                    return identity;
                                }
                                if (typeof value == 'object') {
                                    return isArray(value) ?
                                        baseMatchesProperty(value[0], value[1]) :
                                        baseMatches(value);
                                }
                                return property(value);
                            }

                            /**
                             * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the array of property names.
                             */
                            function baseKeys(object) {
                                if (!isPrototype(object)) {
                                    return nativeKeys(object);
                                }
                                var result = [];
                                for (var key in Object(object)) {
                                    if (hasOwnProperty.call(object, key) && key != 'constructor') {
                                        result.push(key);
                                    }
                                }
                                return result;
                            }

                            /**
                             * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the array of property names.
                             */
                            function baseKeysIn(object) {
                                if (!isObject(object)) {
                                    return nativeKeysIn(object);
                                }
                                var isProto = isPrototype(object),
                                    result = [];

                                for (var key in object) {
                                    if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
                                        result.push(key);
                                    }
                                }
                                return result;
                            }

                            /**
                             * The base implementation of `_.lt` which doesn't coerce arguments.
                             *
                             * @private
                             * @param {*} value The value to compare.
                             * @param {*} other The other value to compare.
                             * @returns {boolean} Returns `true` if `value` is less than `other`,
                             *  else `false`.
                             */
                            function baseLt(value, other) {
                                return value < other;
                            }

                            /**
                             * The base implementation of `_.map` without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} iteratee The function invoked per iteration.
                             * @returns {Array} Returns the new mapped array.
                             */
                            function baseMap(collection, iteratee) {
                                var index = -1,
                                    result = isArrayLike(collection) ? Array(collection.length) : [];

                                baseEach(collection, function(value, key, collection) {
                                    result[++index] = iteratee(value, key, collection);
                                });
                                return result;
                            }

                            /**
                             * The base implementation of `_.matches` which doesn't clone `source`.
                             *
                             * @private
                             * @param {Object} source The object of property values to match.
                             * @returns {Function} Returns the new spec function.
                             */
                            function baseMatches(source) {
                                var matchData = getMatchData(source);
                                if (matchData.length == 1 && matchData[0][2]) {
                                    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
                                }
                                return function(object) {
                                    return object === source || baseIsMatch(object, source, matchData);
                                };
                            }

                            /**
                             * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
                             *
                             * @private
                             * @param {string} path The path of the property to get.
                             * @param {*} srcValue The value to match.
                             * @returns {Function} Returns the new spec function.
                             */
                            function baseMatchesProperty(path, srcValue) {
                                if (isKey(path) && isStrictComparable(srcValue)) {
                                    return matchesStrictComparable(toKey(path), srcValue);
                                }
                                return function(object) {
                                    var objValue = get(object, path);
                                    return (objValue === undefined && objValue === srcValue) ?
                                        hasIn(object, path) :
                                        baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
                                };
                            }

                            /**
                             * The base implementation of `_.merge` without support for multiple sources.
                             *
                             * @private
                             * @param {Object} object The destination object.
                             * @param {Object} source The source object.
                             * @param {number} srcIndex The index of `source`.
                             * @param {Function} [customizer] The function to customize merged values.
                             * @param {Object} [stack] Tracks traversed source values and their merged
                             *  counterparts.
                             */
                            function baseMerge(object, source, srcIndex, customizer, stack) {
                                if (object === source) {
                                    return;
                                }
                                baseFor(source, function(srcValue, key) {
                                    if (isObject(srcValue)) {
                                        stack || (stack = new Stack);
                                        baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
                                    } else {
                                        var newValue = customizer ?
                                            customizer(object[key], srcValue, (key + ''), object, source, stack) :
                                            undefined;

                                        if (newValue === undefined) {
                                            newValue = srcValue;
                                        }
                                        assignMergeValue(object, key, newValue);
                                    }
                                }, keysIn);
                            }

                            /**
                             * A specialized version of `baseMerge` for arrays and objects which performs
                             * deep merges and tracks traversed objects enabling objects with circular
                             * references to be merged.
                             *
                             * @private
                             * @param {Object} object The destination object.
                             * @param {Object} source The source object.
                             * @param {string} key The key of the value to merge.
                             * @param {number} srcIndex The index of `source`.
                             * @param {Function} mergeFunc The function to merge values.
                             * @param {Function} [customizer] The function to customize assigned values.
                             * @param {Object} [stack] Tracks traversed source values and their merged
                             *  counterparts.
                             */
                            function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
                                var objValue = object[key],
                                    srcValue = source[key],
                                    stacked = stack.get(srcValue);

                                if (stacked) {
                                    assignMergeValue(object, key, stacked);
                                    return;
                                }
                                var newValue = customizer ?
                                    customizer(objValue, srcValue, (key + ''), object, source, stack) :
                                    undefined;

                                var isCommon = newValue === undefined;

                                if (isCommon) {
                                    var isArr = isArray(srcValue),
                                        isBuff = !isArr && isBuffer(srcValue),
                                        isTyped = !isArr && !isBuff && isTypedArray(srcValue);

                                    newValue = srcValue;
                                    if (isArr || isBuff || isTyped) {
                                        if (isArray(objValue)) {
                                            newValue = objValue;
                                        } else if (isArrayLikeObject(objValue)) {
                                            newValue = copyArray(objValue);
                                        } else if (isBuff) {
                                            isCommon = false;
                                            newValue = cloneBuffer(srcValue, true);
                                        } else if (isTyped) {
                                            isCommon = false;
                                            newValue = cloneTypedArray(srcValue, true);
                                        } else {
                                            newValue = [];
                                        }
                                    } else if (isPlainObject(srcValue) || isArguments(srcValue)) {
                                        newValue = objValue;
                                        if (isArguments(objValue)) {
                                            newValue = toPlainObject(objValue);
                                        } else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
                                            newValue = initCloneObject(srcValue);
                                        }
                                    } else {
                                        isCommon = false;
                                    }
                                }
                                if (isCommon) {
                                    // Recursively merge objects and arrays (susceptible to call stack limits).
                                    stack.set(srcValue, newValue);
                                    mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
                                    stack['delete'](srcValue);
                                }
                                assignMergeValue(object, key, newValue);
                            }

                            /**
                             * The base implementation of `_.nth` which doesn't coerce arguments.
                             *
                             * @private
                             * @param {Array} array The array to query.
                             * @param {number} n The index of the element to return.
                             * @returns {*} Returns the nth element of `array`.
                             */
                            function baseNth(array, n) {
                                var length = array.length;
                                if (!length) {
                                    return;
                                }
                                n += n < 0 ? length : 0;
                                return isIndex(n, length) ? array[n] : undefined;
                            }

                            /**
                             * The base implementation of `_.orderBy` without param guards.
                             *
                             * @private
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
                             * @param {string[]} orders The sort orders of `iteratees`.
                             * @returns {Array} Returns the new sorted array.
                             */
                            function baseOrderBy(collection, iteratees, orders) {
                                var index = -1;
                                iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));

                                var result = baseMap(collection, function(value, key, collection) {
                                    var criteria = arrayMap(iteratees, function(iteratee) {
                                        return iteratee(value);
                                    });
                                    return { 'criteria': criteria, 'index': ++index, 'value': value };
                                });

                                return baseSortBy(result, function(object, other) {
                                    return compareMultiple(object, other, orders);
                                });
                            }

                            /**
                             * The base implementation of `_.pick` without support for individual
                             * property identifiers.
                             *
                             * @private
                             * @param {Object} object The source object.
                             * @param {string[]} paths The property paths to pick.
                             * @returns {Object} Returns the new object.
                             */
                            function basePick(object, paths) {
                                return basePickBy(object, paths, function(value, path) {
                                    return hasIn(object, path);
                                });
                            }

                            /**
                             * The base implementation of  `_.pickBy` without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Object} object The source object.
                             * @param {string[]} paths The property paths to pick.
                             * @param {Function} predicate The function invoked per property.
                             * @returns {Object} Returns the new object.
                             */
                            function basePickBy(object, paths, predicate) {
                                var index = -1,
                                    length = paths.length,
                                    result = {};

                                while (++index < length) {
                                    var path = paths[index],
                                        value = baseGet(object, path);

                                    if (predicate(value, path)) {
                                        baseSet(result, castPath(path, object), value);
                                    }
                                }
                                return result;
                            }

                            /**
                             * A specialized version of `baseProperty` which supports deep paths.
                             *
                             * @private
                             * @param {Array|string} path The path of the property to get.
                             * @returns {Function} Returns the new accessor function.
                             */
                            function basePropertyDeep(path) {
                                return function(object) {
                                    return baseGet(object, path);
                                };
                            }

                            /**
                             * The base implementation of `_.pullAllBy` without support for iteratee
                             * shorthands.
                             *
                             * @private
                             * @param {Array} array The array to modify.
                             * @param {Array} values The values to remove.
                             * @param {Function} [iteratee] The iteratee invoked per element.
                             * @param {Function} [comparator] The comparator invoked per element.
                             * @returns {Array} Returns `array`.
                             */
                            function basePullAll(array, values, iteratee, comparator) {
                                var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
                                    index = -1,
                                    length = values.length,
                                    seen = array;

                                if (array === values) {
                                    values = copyArray(values);
                                }
                                if (iteratee) {
                                    seen = arrayMap(array, baseUnary(iteratee));
                                }
                                while (++index < length) {
                                    var fromIndex = 0,
                                        value = values[index],
                                        computed = iteratee ? iteratee(value) : value;

                                    while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
                                        if (seen !== array) {
                                            splice.call(seen, fromIndex, 1);
                                        }
                                        splice.call(array, fromIndex, 1);
                                    }
                                }
                                return array;
                            }

                            /**
                             * The base implementation of `_.pullAt` without support for individual
                             * indexes or capturing the removed elements.
                             *
                             * @private
                             * @param {Array} array The array to modify.
                             * @param {number[]} indexes The indexes of elements to remove.
                             * @returns {Array} Returns `array`.
                             */
                            function basePullAt(array, indexes) {
                                var length = array ? indexes.length : 0,
                                    lastIndex = length - 1;

                                while (length--) {
                                    var index = indexes[length];
                                    if (length == lastIndex || index !== previous) {
                                        var previous = index;
                                        if (isIndex(index)) {
                                            splice.call(array, index, 1);
                                        } else {
                                            baseUnset(array, index);
                                        }
                                    }
                                }
                                return array;
                            }

                            /**
                             * The base implementation of `_.random` without support for returning
                             * floating-point numbers.
                             *
                             * @private
                             * @param {number} lower The lower bound.
                             * @param {number} upper The upper bound.
                             * @returns {number} Returns the random number.
                             */
                            function baseRandom(lower, upper) {
                                return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
                            }

                            /**
                             * The base implementation of `_.range` and `_.rangeRight` which doesn't
                             * coerce arguments.
                             *
                             * @private
                             * @param {number} start The start of the range.
                             * @param {number} end The end of the range.
                             * @param {number} step The value to increment or decrement by.
                             * @param {boolean} [fromRight] Specify iterating from right to left.
                             * @returns {Array} Returns the range of numbers.
                             */
                            function baseRange(start, end, step, fromRight) {
                                var index = -1,
                                    length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
                                    result = Array(length);

                                while (length--) {
                                    result[fromRight ? length : ++index] = start;
                                    start += step;
                                }
                                return result;
                            }

                            /**
                             * The base implementation of `_.repeat` which doesn't coerce arguments.
                             *
                             * @private
                             * @param {string} string The string to repeat.
                             * @param {number} n The number of times to repeat the string.
                             * @returns {string} Returns the repeated string.
                             */
                            function baseRepeat(string, n) {
                                var result = '';
                                if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
                                    return result;
                                }
                                // Leverage the exponentiation by squaring algorithm for a faster repeat.
                                // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
                                do {
                                    if (n % 2) {
                                        result += string;
                                    }
                                    n = nativeFloor(n / 2);
                                    if (n) {
                                        string += string;
                                    }
                                } while (n);

                                return result;
                            }

                            /**
                             * The base implementation of `_.rest` which doesn't validate or coerce arguments.
                             *
                             * @private
                             * @param {Function} func The function to apply a rest parameter to.
                             * @param {number} [start=func.length-1] The start position of the rest parameter.
                             * @returns {Function} Returns the new function.
                             */
                            function baseRest(func, start) {
                                return setToString(overRest(func, start, identity), func + '');
                            }

                            /**
                             * The base implementation of `_.sample`.
                             *
                             * @private
                             * @param {Array|Object} collection The collection to sample.
                             * @returns {*} Returns the random element.
                             */
                            function baseSample(collection) {
                                return arraySample(values(collection));
                            }

                            /**
                             * The base implementation of `_.sampleSize` without param guards.
                             *
                             * @private
                             * @param {Array|Object} collection The collection to sample.
                             * @param {number} n The number of elements to sample.
                             * @returns {Array} Returns the random elements.
                             */
                            function baseSampleSize(collection, n) {
                                var array = values(collection);
                                return shuffleSelf(array, baseClamp(n, 0, array.length));
                            }

                            /**
                             * The base implementation of `_.set`.
                             *
                             * @private
                             * @param {Object} object The object to modify.
                             * @param {Array|string} path The path of the property to set.
                             * @param {*} value The value to set.
                             * @param {Function} [customizer] The function to customize path creation.
                             * @returns {Object} Returns `object`.
                             */
                            function baseSet(object, path, value, customizer) {
                                if (!isObject(object)) {
                                    return object;
                                }
                                path = castPath(path, object);

                                var index = -1,
                                    length = path.length,
                                    lastIndex = length - 1,
                                    nested = object;

                                while (nested != null && ++index < length) {
                                    var key = toKey(path[index]),
                                        newValue = value;

                                    if (index != lastIndex) {
                                        var objValue = nested[key];
                                        newValue = customizer ? customizer(objValue, key, nested) : undefined;
                                        if (newValue === undefined) {
                                            newValue = isObject(objValue) ?
                                                objValue :
                                                (isIndex(path[index + 1]) ? [] : {});
                                        }
                                    }
                                    assignValue(nested, key, newValue);
                                    nested = nested[key];
                                }
                                return object;
                            }

                            /**
                             * The base implementation of `setData` without support for hot loop shorting.
                             *
                             * @private
                             * @param {Function} func The function to associate metadata with.
                             * @param {*} data The metadata.
                             * @returns {Function} Returns `func`.
                             */
                            var baseSetData = !metaMap ? identity : function(func, data) {
                                metaMap.set(func, data);
                                return func;
                            };

                            /**
                             * The base implementation of `setToString` without support for hot loop shorting.
                             *
                             * @private
                             * @param {Function} func The function to modify.
                             * @param {Function} string The `toString` result.
                             * @returns {Function} Returns `func`.
                             */
                            var baseSetToString = !defineProperty ? identity : function(func, string) {
                                return defineProperty(func, 'toString', {
                                    'configurable': true,
                                    'enumerable': false,
                                    'value': constant(string),
                                    'writable': true
                                });
                            };

                            /**
                             * The base implementation of `_.shuffle`.
                             *
                             * @private
                             * @param {Array|Object} collection The collection to shuffle.
                             * @returns {Array} Returns the new shuffled array.
                             */
                            function baseShuffle(collection) {
                                return shuffleSelf(values(collection));
                            }

                            /**
                             * The base implementation of `_.slice` without an iteratee call guard.
                             *
                             * @private
                             * @param {Array} array The array to slice.
                             * @param {number} [start=0] The start position.
                             * @param {number} [end=array.length] The end position.
                             * @returns {Array} Returns the slice of `array`.
                             */
                            function baseSlice(array, start, end) {
                                var index = -1,
                                    length = array.length;

                                if (start < 0) {
                                    start = -start > length ? 0 : (length + start);
                                }
                                end = end > length ? length : end;
                                if (end < 0) {
                                    end += length;
                                }
                                length = start > end ? 0 : ((end - start) >>> 0);
                                start >>>= 0;

                                var result = Array(length);
                                while (++index < length) {
                                    result[index] = array[index + start];
                                }
                                return result;
                            }

                            /**
                             * The base implementation of `_.some` without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} predicate The function invoked per iteration.
                             * @returns {boolean} Returns `true` if any element passes the predicate check,
                             *  else `false`.
                             */
                            function baseSome(collection, predicate) {
                                var result;

                                baseEach(collection, function(value, index, collection) {
                                    result = predicate(value, index, collection);
                                    return !result;
                                });
                                return !!result;
                            }

                            /**
                             * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
                             * performs a binary search of `array` to determine the index at which `value`
                             * should be inserted into `array` in order to maintain its sort order.
                             *
                             * @private
                             * @param {Array} array The sorted array to inspect.
                             * @param {*} value The value to evaluate.
                             * @param {boolean} [retHighest] Specify returning the highest qualified index.
                             * @returns {number} Returns the index at which `value` should be inserted
                             *  into `array`.
                             */
                            function baseSortedIndex(array, value, retHighest) {
                                var low = 0,
                                    high = array == null ? low : array.length;

                                if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
                                    while (low < high) {
                                        var mid = (low + high) >>> 1,
                                            computed = array[mid];

                                        if (computed !== null && !isSymbol(computed) &&
                                            (retHighest ? (computed <= value) : (computed < value))) {
                                            low = mid + 1;
                                        } else {
                                            high = mid;
                                        }
                                    }
                                    return high;
                                }
                                return baseSortedIndexBy(array, value, identity, retHighest);
                            }

                            /**
                             * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
                             * which invokes `iteratee` for `value` and each element of `array` to compute
                             * their sort ranking. The iteratee is invoked with one argument; (value).
                             *
                             * @private
                             * @param {Array} array The sorted array to inspect.
                             * @param {*} value The value to evaluate.
                             * @param {Function} iteratee The iteratee invoked per element.
                             * @param {boolean} [retHighest] Specify returning the highest qualified index.
                             * @returns {number} Returns the index at which `value` should be inserted
                             *  into `array`.
                             */
                            function baseSortedIndexBy(array, value, iteratee, retHighest) {
                                value = iteratee(value);

                                var low = 0,
                                    high = array == null ? 0 : array.length,
                                    valIsNaN = value !== value,
                                    valIsNull = value === null,
                                    valIsSymbol = isSymbol(value),
                                    valIsUndefined = value === undefined;

                                while (low < high) {
                                    var mid = nativeFloor((low + high) / 2),
                                        computed = iteratee(array[mid]),
                                        othIsDefined = computed !== undefined,
                                        othIsNull = computed === null,
                                        othIsReflexive = computed === computed,
                                        othIsSymbol = isSymbol(computed);

                                    if (valIsNaN) {
                                        var setLow = retHighest || othIsReflexive;
                                    } else if (valIsUndefined) {
                                        setLow = othIsReflexive && (retHighest || othIsDefined);
                                    } else if (valIsNull) {
                                        setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
                                    } else if (valIsSymbol) {
                                        setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
                                    } else if (othIsNull || othIsSymbol) {
                                        setLow = false;
                                    } else {
                                        setLow = retHighest ? (computed <= value) : (computed < value);
                                    }
                                    if (setLow) {
                                        low = mid + 1;
                                    } else {
                                        high = mid;
                                    }
                                }
                                return nativeMin(high, MAX_ARRAY_INDEX);
                            }

                            /**
                             * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
                             * support for iteratee shorthands.
                             *
                             * @private
                             * @param {Array} array The array to inspect.
                             * @param {Function} [iteratee] The iteratee invoked per element.
                             * @returns {Array} Returns the new duplicate free array.
                             */
                            function baseSortedUniq(array, iteratee) {
                                var index = -1,
                                    length = array.length,
                                    resIndex = 0,
                                    result = [];

                                while (++index < length) {
                                    var value = array[index],
                                        computed = iteratee ? iteratee(value) : value;

                                    if (!index || !eq(computed, seen)) {
                                        var seen = computed;
                                        result[resIndex++] = value === 0 ? 0 : value;
                                    }
                                }
                                return result;
                            }

                            /**
                             * The base implementation of `_.toNumber` which doesn't ensure correct
                             * conversions of binary, hexadecimal, or octal string values.
                             *
                             * @private
                             * @param {*} value The value to process.
                             * @returns {number} Returns the number.
                             */
                            function baseToNumber(value) {
                                if (typeof value == 'number') {
                                    return value;
                                }
                                if (isSymbol(value)) {
                                    return NAN;
                                }
                                return +value;
                            }

                            /**
                             * The base implementation of `_.toString` which doesn't convert nullish
                             * values to empty strings.
                             *
                             * @private
                             * @param {*} value The value to process.
                             * @returns {string} Returns the string.
                             */
                            function baseToString(value) {
                                // Exit early for strings to avoid a performance hit in some environments.
                                if (typeof value == 'string') {
                                    return value;
                                }
                                if (isArray(value)) {
                                    // Recursively convert values (susceptible to call stack limits).
                                    return arrayMap(value, baseToString) + '';
                                }
                                if (isSymbol(value)) {
                                    return symbolToString ? symbolToString.call(value) : '';
                                }
                                var result = (value + '');
                                return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
                            }

                            /**
                             * The base implementation of `_.uniqBy` without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Array} array The array to inspect.
                             * @param {Function} [iteratee] The iteratee invoked per element.
                             * @param {Function} [comparator] The comparator invoked per element.
                             * @returns {Array} Returns the new duplicate free array.
                             */
                            function baseUniq(array, iteratee, comparator) {
                                var index = -1,
                                    includes = arrayIncludes,
                                    length = array.length,
                                    isCommon = true,
                                    result = [],
                                    seen = result;

                                if (comparator) {
                                    isCommon = false;
                                    includes = arrayIncludesWith;
                                } else if (length >= LARGE_ARRAY_SIZE) {
                                    var set = iteratee ? null : createSet(array);
                                    if (set) {
                                        return setToArray(set);
                                    }
                                    isCommon = false;
                                    includes = cacheHas;
                                    seen = new SetCache;
                                } else {
                                    seen = iteratee ? [] : result;
                                }
                                outer:
                                    while (++index < length) {
                                        var value = array[index],
                                            computed = iteratee ? iteratee(value) : value;

                                        value = (comparator || value !== 0) ? value : 0;
                                        if (isCommon && computed === computed) {
                                            var seenIndex = seen.length;
                                            while (seenIndex--) {
                                                if (seen[seenIndex] === computed) {
                                                    continue outer;
                                                }
                                            }
                                            if (iteratee) {
                                                seen.push(computed);
                                            }
                                            result.push(value);
                                        } else if (!includes(seen, computed, comparator)) {
                                            if (seen !== result) {
                                                seen.push(computed);
                                            }
                                            result.push(value);
                                        }
                                    }
                                return result;
                            }

                            /**
                             * The base implementation of `_.unset`.
                             *
                             * @private
                             * @param {Object} object The object to modify.
                             * @param {Array|string} path The property path to unset.
                             * @returns {boolean} Returns `true` if the property is deleted, else `false`.
                             */
                            function baseUnset(object, path) {
                                path = castPath(path, object);
                                object = parent(object, path);
                                return object == null || delete object[toKey(last(path))];
                            }

                            /**
                             * The base implementation of `_.update`.
                             *
                             * @private
                             * @param {Object} object The object to modify.
                             * @param {Array|string} path The path of the property to update.
                             * @param {Function} updater The function to produce the updated value.
                             * @param {Function} [customizer] The function to customize path creation.
                             * @returns {Object} Returns `object`.
                             */
                            function baseUpdate(object, path, updater, customizer) {
                                return baseSet(object, path, updater(baseGet(object, path)), customizer);
                            }

                            /**
                             * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
                             * without support for iteratee shorthands.
                             *
                             * @private
                             * @param {Array} array The array to query.
                             * @param {Function} predicate The function invoked per iteration.
                             * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
                             * @param {boolean} [fromRight] Specify iterating from right to left.
                             * @returns {Array} Returns the slice of `array`.
                             */
                            function baseWhile(array, predicate, isDrop, fromRight) {
                                var length = array.length,
                                    index = fromRight ? length : -1;

                                while ((fromRight ? index-- : ++index < length) &&
                                    predicate(array[index], index, array)) {}

                                return isDrop ?
                                    baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length)) :
                                    baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
                            }

                            /**
                             * The base implementation of `wrapperValue` which returns the result of
                             * performing a sequence of actions on the unwrapped `value`, where each
                             * successive action is supplied the return value of the previous.
                             *
                             * @private
                             * @param {*} value The unwrapped value.
                             * @param {Array} actions Actions to perform to resolve the unwrapped value.
                             * @returns {*} Returns the resolved value.
                             */
                            function baseWrapperValue(value, actions) {
                                var result = value;
                                if (result instanceof LazyWrapper) {
                                    result = result.value();
                                }
                                return arrayReduce(actions, function(result, action) {
                                    return action.func.apply(action.thisArg, arrayPush([result], action.args));
                                }, result);
                            }

                            /**
                             * The base implementation of methods like `_.xor`, without support for
                             * iteratee shorthands, that accepts an array of arrays to inspect.
                             *
                             * @private
                             * @param {Array} arrays The arrays to inspect.
                             * @param {Function} [iteratee] The iteratee invoked per element.
                             * @param {Function} [comparator] The comparator invoked per element.
                             * @returns {Array} Returns the new array of values.
                             */
                            function baseXor(arrays, iteratee, comparator) {
                                var length = arrays.length;
                                if (length < 2) {
                                    return length ? baseUniq(arrays[0]) : [];
                                }
                                var index = -1,
                                    result = Array(length);

                                while (++index < length) {
                                    var array = arrays[index],
                                        othIndex = -1;

                                    while (++othIndex < length) {
                                        if (othIndex != index) {
                                            result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
                                        }
                                    }
                                }
                                return baseUniq(baseFlatten(result, 1), iteratee, comparator);
                            }

                            /**
                             * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
                             *
                             * @private
                             * @param {Array} props The property identifiers.
                             * @param {Array} values The property values.
                             * @param {Function} assignFunc The function to assign values.
                             * @returns {Object} Returns the new object.
                             */
                            function baseZipObject(props, values, assignFunc) {
                                var index = -1,
                                    length = props.length,
                                    valsLength = values.length,
                                    result = {};

                                while (++index < length) {
                                    var value = index < valsLength ? values[index] : undefined;
                                    assignFunc(result, props[index], value);
                                }
                                return result;
                            }

                            /**
                             * Casts `value` to an empty array if it's not an array like object.
                             *
                             * @private
                             * @param {*} value The value to inspect.
                             * @returns {Array|Object} Returns the cast array-like object.
                             */
                            function castArrayLikeObject(value) {
                                return isArrayLikeObject(value) ? value : [];
                            }

                            /**
                             * Casts `value` to `identity` if it's not a function.
                             *
                             * @private
                             * @param {*} value The value to inspect.
                             * @returns {Function} Returns cast function.
                             */
                            function castFunction(value) {
                                return typeof value == 'function' ? value : identity;
                            }

                            /**
                             * Casts `value` to a path array if it's not one.
                             *
                             * @private
                             * @param {*} value The value to inspect.
                             * @param {Object} [object] The object to query keys on.
                             * @returns {Array} Returns the cast property path array.
                             */
                            function castPath(value, object) {
                                if (isArray(value)) {
                                    return value;
                                }
                                return isKey(value, object) ? [value] : stringToPath(toString(value));
                            }

                            /**
                             * A `baseRest` alias which can be replaced with `identity` by module
                             * replacement plugins.
                             *
                             * @private
                             * @type {Function}
                             * @param {Function} func The function to apply a rest parameter to.
                             * @returns {Function} Returns the new function.
                             */
                            var castRest = baseRest;

                            /**
                             * Casts `array` to a slice if it's needed.
                             *
                             * @private
                             * @param {Array} array The array to inspect.
                             * @param {number} start The start position.
                             * @param {number} [end=array.length] The end position.
                             * @returns {Array} Returns the cast slice.
                             */
                            function castSlice(array, start, end) {
                                var length = array.length;
                                end = end === undefined ? length : end;
                                return (!start && end >= length) ? array : baseSlice(array, start, end);
                            }

                            /**
                             * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
                             *
                             * @private
                             * @param {number|Object} id The timer id or timeout object of the timer to clear.
                             */
                            var clearTimeout = ctxClearTimeout || function(id) {
                                return root.clearTimeout(id);
                            };

                            /**
                             * Creates a clone of  `buffer`.
                             *
                             * @private
                             * @param {Buffer} buffer The buffer to clone.
                             * @param {boolean} [isDeep] Specify a deep clone.
                             * @returns {Buffer} Returns the cloned buffer.
                             */
                            function cloneBuffer(buffer, isDeep) {
                                if (isDeep) {
                                    return buffer.slice();
                                }
                                var length = buffer.length,
                                    result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);

                                buffer.copy(result);
                                return result;
                            }

                            /**
                             * Creates a clone of `arrayBuffer`.
                             *
                             * @private
                             * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
                             * @returns {ArrayBuffer} Returns the cloned array buffer.
                             */
                            function cloneArrayBuffer(arrayBuffer) {
                                var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
                                new Uint8Array(result).set(new Uint8Array(arrayBuffer));
                                return result;
                            }

                            /**
                             * Creates a clone of `dataView`.
                             *
                             * @private
                             * @param {Object} dataView The data view to clone.
                             * @param {boolean} [isDeep] Specify a deep clone.
                             * @returns {Object} Returns the cloned data view.
                             */
                            function cloneDataView(dataView, isDeep) {
                                var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
                                return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
                            }

                            /**
                             * Creates a clone of `map`.
                             *
                             * @private
                             * @param {Object} map The map to clone.
                             * @param {Function} cloneFunc The function to clone values.
                             * @param {boolean} [isDeep] Specify a deep clone.
                             * @returns {Object} Returns the cloned map.
                             */
                            function cloneMap(map, isDeep, cloneFunc) {
                                var array = isDeep ? cloneFunc(mapToArray(map), CLONE_DEEP_FLAG) : mapToArray(map);
                                return arrayReduce(array, addMapEntry, new map.constructor);
                            }

                            /**
                             * Creates a clone of `regexp`.
                             *
                             * @private
                             * @param {Object} regexp The regexp to clone.
                             * @returns {Object} Returns the cloned regexp.
                             */
                            function cloneRegExp(regexp) {
                                var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
                                result.lastIndex = regexp.lastIndex;
                                return result;
                            }

                            /**
                             * Creates a clone of `set`.
                             *
                             * @private
                             * @param {Object} set The set to clone.
                             * @param {Function} cloneFunc The function to clone values.
                             * @param {boolean} [isDeep] Specify a deep clone.
                             * @returns {Object} Returns the cloned set.
                             */
                            function cloneSet(set, isDeep, cloneFunc) {
                                var array = isDeep ? cloneFunc(setToArray(set), CLONE_DEEP_FLAG) : setToArray(set);
                                return arrayReduce(array, addSetEntry, new set.constructor);
                            }

                            /**
                             * Creates a clone of the `symbol` object.
                             *
                             * @private
                             * @param {Object} symbol The symbol object to clone.
                             * @returns {Object} Returns the cloned symbol object.
                             */
                            function cloneSymbol(symbol) {
                                return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
                            }

                            /**
                             * Creates a clone of `typedArray`.
                             *
                             * @private
                             * @param {Object} typedArray The typed array to clone.
                             * @param {boolean} [isDeep] Specify a deep clone.
                             * @returns {Object} Returns the cloned typed array.
                             */
                            function cloneTypedArray(typedArray, isDeep) {
                                var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
                                return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
                            }

                            /**
                             * Compares values to sort them in ascending order.
                             *
                             * @private
                             * @param {*} value The value to compare.
                             * @param {*} other The other value to compare.
                             * @returns {number} Returns the sort order indicator for `value`.
                             */
                            function compareAscending(value, other) {
                                if (value !== other) {
                                    var valIsDefined = value !== undefined,
                                        valIsNull = value === null,
                                        valIsReflexive = value === value,
                                        valIsSymbol = isSymbol(value);

                                    var othIsDefined = other !== undefined,
                                        othIsNull = other === null,
                                        othIsReflexive = other === other,
                                        othIsSymbol = isSymbol(other);

                                    if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
                                        (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
                                        (valIsNull && othIsDefined && othIsReflexive) ||
                                        (!valIsDefined && othIsReflexive) ||
                                        !valIsReflexive) {
                                        return 1;
                                    }
                                    if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
                                        (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
                                        (othIsNull && valIsDefined && valIsReflexive) ||
                                        (!othIsDefined && valIsReflexive) ||
                                        !othIsReflexive) {
                                        return -1;
                                    }
                                }
                                return 0;
                            }

                            /**
                             * Used by `_.orderBy` to compare multiple properties of a value to another
                             * and stable sort them.
                             *
                             * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
                             * specify an order of "desc" for descending or "asc" for ascending sort order
                             * of corresponding values.
                             *
                             * @private
                             * @param {Object} object The object to compare.
                             * @param {Object} other The other object to compare.
                             * @param {boolean[]|string[]} orders The order to sort by for each property.
                             * @returns {number} Returns the sort order indicator for `object`.
                             */
                            function compareMultiple(object, other, orders) {
                                var index = -1,
                                    objCriteria = object.criteria,
                                    othCriteria = other.criteria,
                                    length = objCriteria.length,
                                    ordersLength = orders.length;

                                while (++index < length) {
                                    var result = compareAscending(objCriteria[index], othCriteria[index]);
                                    if (result) {
                                        if (index >= ordersLength) {
                                            return result;
                                        }
                                        var order = orders[index];
                                        return result * (order == 'desc' ? -1 : 1);
                                    }
                                }
                                // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
                                // that causes it, under certain circumstances, to provide the same value for
                                // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
                                // for more details.
                                //
                                // This also ensures a stable sort in V8 and other engines.
                                // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
                                return object.index - other.index;
                            }

                            /**
                             * Creates an array that is the composition of partially applied arguments,
                             * placeholders, and provided arguments into a single array of arguments.
                             *
                             * @private
                             * @param {Array} args The provided arguments.
                             * @param {Array} partials The arguments to prepend to those provided.
                             * @param {Array} holders The `partials` placeholder indexes.
                             * @params {boolean} [isCurried] Specify composing for a curried function.
                             * @returns {Array} Returns the new array of composed arguments.
                             */
                            function composeArgs(args, partials, holders, isCurried) {
                                var argsIndex = -1,
                                    argsLength = args.length,
                                    holdersLength = holders.length,
                                    leftIndex = -1,
                                    leftLength = partials.length,
                                    rangeLength = nativeMax(argsLength - holdersLength, 0),
                                    result = Array(leftLength + rangeLength),
                                    isUncurried = !isCurried;

                                while (++leftIndex < leftLength) {
                                    result[leftIndex] = partials[leftIndex];
                                }
                                while (++argsIndex < holdersLength) {
                                    if (isUncurried || argsIndex < argsLength) {
                                        result[holders[argsIndex]] = args[argsIndex];
                                    }
                                }
                                while (rangeLength--) {
                                    result[leftIndex++] = args[argsIndex++];
                                }
                                return result;
                            }

                            /**
                             * This function is like `composeArgs` except that the arguments composition
                             * is tailored for `_.partialRight`.
                             *
                             * @private
                             * @param {Array} args The provided arguments.
                             * @param {Array} partials The arguments to append to those provided.
                             * @param {Array} holders The `partials` placeholder indexes.
                             * @params {boolean} [isCurried] Specify composing for a curried function.
                             * @returns {Array} Returns the new array of composed arguments.
                             */
                            function composeArgsRight(args, partials, holders, isCurried) {
                                var argsIndex = -1,
                                    argsLength = args.length,
                                    holdersIndex = -1,
                                    holdersLength = holders.length,
                                    rightIndex = -1,
                                    rightLength = partials.length,
                                    rangeLength = nativeMax(argsLength - holdersLength, 0),
                                    result = Array(rangeLength + rightLength),
                                    isUncurried = !isCurried;

                                while (++argsIndex < rangeLength) {
                                    result[argsIndex] = args[argsIndex];
                                }
                                var offset = argsIndex;
                                while (++rightIndex < rightLength) {
                                    result[offset + rightIndex] = partials[rightIndex];
                                }
                                while (++holdersIndex < holdersLength) {
                                    if (isUncurried || argsIndex < argsLength) {
                                        result[offset + holders[holdersIndex]] = args[argsIndex++];
                                    }
                                }
                                return result;
                            }

                            /**
                             * Copies the values of `source` to `array`.
                             *
                             * @private
                             * @param {Array} source The array to copy values from.
                             * @param {Array} [array=[]] The array to copy values to.
                             * @returns {Array} Returns `array`.
                             */
                            function copyArray(source, array) {
                                var index = -1,
                                    length = source.length;

                                array || (array = Array(length));
                                while (++index < length) {
                                    array[index] = source[index];
                                }
                                return array;
                            }

                            /**
                             * Copies properties of `source` to `object`.
                             *
                             * @private
                             * @param {Object} source The object to copy properties from.
                             * @param {Array} props The property identifiers to copy.
                             * @param {Object} [object={}] The object to copy properties to.
                             * @param {Function} [customizer] The function to customize copied values.
                             * @returns {Object} Returns `object`.
                             */
                            function copyObject(source, props, object, customizer) {
                                var isNew = !object;
                                object || (object = {});

                                var index = -1,
                                    length = props.length;

                                while (++index < length) {
                                    var key = props[index];

                                    var newValue = customizer ?
                                        customizer(object[key], source[key], key, object, source) :
                                        undefined;

                                    if (newValue === undefined) {
                                        newValue = source[key];
                                    }
                                    if (isNew) {
                                        baseAssignValue(object, key, newValue);
                                    } else {
                                        assignValue(object, key, newValue);
                                    }
                                }
                                return object;
                            }

                            /**
                             * Copies own symbols of `source` to `object`.
                             *
                             * @private
                             * @param {Object} source The object to copy symbols from.
                             * @param {Object} [object={}] The object to copy symbols to.
                             * @returns {Object} Returns `object`.
                             */
                            function copySymbols(source, object) {
                                return copyObject(source, getSymbols(source), object);
                            }

                            /**
                             * Copies own and inherited symbols of `source` to `object`.
                             *
                             * @private
                             * @param {Object} source The object to copy symbols from.
                             * @param {Object} [object={}] The object to copy symbols to.
                             * @returns {Object} Returns `object`.
                             */
                            function copySymbolsIn(source, object) {
                                return copyObject(source, getSymbolsIn(source), object);
                            }

                            /**
                             * Creates a function like `_.groupBy`.
                             *
                             * @private
                             * @param {Function} setter The function to set accumulator values.
                             * @param {Function} [initializer] The accumulator object initializer.
                             * @returns {Function} Returns the new aggregator function.
                             */
                            function createAggregator(setter, initializer) {
                                return function(collection, iteratee) {
                                    var func = isArray(collection) ? arrayAggregator : baseAggregator,
                                        accumulator = initializer ? initializer() : {};

                                    return func(collection, setter, getIteratee(iteratee, 2), accumulator);
                                };
                            }

                            /**
                             * Creates a function like `_.assign`.
                             *
                             * @private
                             * @param {Function} assigner The function to assign values.
                             * @returns {Function} Returns the new assigner function.
                             */
                            function createAssigner(assigner) {
                                return baseRest(function(object, sources) {
                                    var index = -1,
                                        length = sources.length,
                                        customizer = length > 1 ? sources[length - 1] : undefined,
                                        guard = length > 2 ? sources[2] : undefined;

                                    customizer = (assigner.length > 3 && typeof customizer == 'function') ?
                                        (length--, customizer) :
                                        undefined;

                                    if (guard && isIterateeCall(sources[0], sources[1], guard)) {
                                        customizer = length < 3 ? undefined : customizer;
                                        length = 1;
                                    }
                                    object = Object(object);
                                    while (++index < length) {
                                        var source = sources[index];
                                        if (source) {
                                            assigner(object, source, index, customizer);
                                        }
                                    }
                                    return object;
                                });
                            }

                            /**
                             * Creates a `baseEach` or `baseEachRight` function.
                             *
                             * @private
                             * @param {Function} eachFunc The function to iterate over a collection.
                             * @param {boolean} [fromRight] Specify iterating from right to left.
                             * @returns {Function} Returns the new base function.
                             */
                            function createBaseEach(eachFunc, fromRight) {
                                return function(collection, iteratee) {
                                    if (collection == null) {
                                        return collection;
                                    }
                                    if (!isArrayLike(collection)) {
                                        return eachFunc(collection, iteratee);
                                    }
                                    var length = collection.length,
                                        index = fromRight ? length : -1,
                                        iterable = Object(collection);

                                    while ((fromRight ? index-- : ++index < length)) {
                                        if (iteratee(iterable[index], index, iterable) === false) {
                                            break;
                                        }
                                    }
                                    return collection;
                                };
                            }

                            /**
                             * Creates a base function for methods like `_.forIn` and `_.forOwn`.
                             *
                             * @private
                             * @param {boolean} [fromRight] Specify iterating from right to left.
                             * @returns {Function} Returns the new base function.
                             */
                            function createBaseFor(fromRight) {
                                return function(object, iteratee, keysFunc) {
                                    var index = -1,
                                        iterable = Object(object),
                                        props = keysFunc(object),
                                        length = props.length;

                                    while (length--) {
                                        var key = props[fromRight ? length : ++index];
                                        if (iteratee(iterable[key], key, iterable) === false) {
                                            break;
                                        }
                                    }
                                    return object;
                                };
                            }

                            /**
                             * Creates a function that wraps `func` to invoke it with the optional `this`
                             * binding of `thisArg`.
                             *
                             * @private
                             * @param {Function} func The function to wrap.
                             * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
                             * @param {*} [thisArg] The `this` binding of `func`.
                             * @returns {Function} Returns the new wrapped function.
                             */
                            function createBind(func, bitmask, thisArg) {
                                var isBind = bitmask & WRAP_BIND_FLAG,
                                    Ctor = createCtor(func);

                                function wrapper() {
                                    var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
                                    return fn.apply(isBind ? thisArg : this, arguments);
                                }
                                return wrapper;
                            }

                            /**
                             * Creates a function like `_.lowerFirst`.
                             *
                             * @private
                             * @param {string} methodName The name of the `String` case method to use.
                             * @returns {Function} Returns the new case function.
                             */
                            function createCaseFirst(methodName) {
                                return function(string) {
                                    string = toString(string);

                                    var strSymbols = hasUnicode(string) ?
                                        stringToArray(string) :
                                        undefined;

                                    var chr = strSymbols ?
                                        strSymbols[0] :
                                        string.charAt(0);

                                    var trailing = strSymbols ?
                                        castSlice(strSymbols, 1).join('') :
                                        string.slice(1);

                                    return chr[methodName]() + trailing;
                                };
                            }

                            /**
                             * Creates a function like `_.camelCase`.
                             *
                             * @private
                             * @param {Function} callback The function to combine each word.
                             * @returns {Function} Returns the new compounder function.
                             */
                            function createCompounder(callback) {
                                return function(string) {
                                    return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
                                };
                            }

                            /**
                             * Creates a function that produces an instance of `Ctor` regardless of
                             * whether it was invoked as part of a `new` expression or by `call` or `apply`.
                             *
                             * @private
                             * @param {Function} Ctor The constructor to wrap.
                             * @returns {Function} Returns the new wrapped function.
                             */
                            function createCtor(Ctor) {
                                return function() {
                                    // Use a `switch` statement to work with class constructors. See
                                    // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
                                    // for more details.
                                    var args = arguments;
                                    switch (args.length) {
                                        case 0:
                                            return new Ctor;
                                        case 1:
                                            return new Ctor(args[0]);
                                        case 2:
                                            return new Ctor(args[0], args[1]);
                                        case 3:
                                            return new Ctor(args[0], args[1], args[2]);
                                        case 4:
                                            return new Ctor(args[0], args[1], args[2], args[3]);
                                        case 5:
                                            return new Ctor(args[0], args[1], args[2], args[3], args[4]);
                                        case 6:
                                            return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
                                        case 7:
                                            return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
                                    }
                                    var thisBinding = baseCreate(Ctor.prototype),
                                        result = Ctor.apply(thisBinding, args);

                                    // Mimic the constructor's `return` behavior.
                                    // See https://es5.github.io/#x13.2.2 for more details.
                                    return isObject(result) ? result : thisBinding;
                                };
                            }

                            /**
                             * Creates a function that wraps `func` to enable currying.
                             *
                             * @private
                             * @param {Function} func The function to wrap.
                             * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
                             * @param {number} arity The arity of `func`.
                             * @returns {Function} Returns the new wrapped function.
                             */
                            function createCurry(func, bitmask, arity) {
                                var Ctor = createCtor(func);

                                function wrapper() {
                                    var length = arguments.length,
                                        args = Array(length),
                                        index = length,
                                        placeholder = getHolder(wrapper);

                                    while (index--) {
                                        args[index] = arguments[index];
                                    }
                                    var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder) ? [] :
                                        replaceHolders(args, placeholder);

                                    length -= holders.length;
                                    if (length < arity) {
                                        return createRecurry(
                                            func, bitmask, createHybrid, wrapper.placeholder, undefined,
                                            args, holders, undefined, undefined, arity - length);
                                    }
                                    var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
                                    return apply(fn, this, args);
                                }
                                return wrapper;
                            }

                            /**
                             * Creates a `_.find` or `_.findLast` function.
                             *
                             * @private
                             * @param {Function} findIndexFunc The function to find the collection index.
                             * @returns {Function} Returns the new find function.
                             */
                            function createFind(findIndexFunc) {
                                return function(collection, predicate, fromIndex) {
                                    var iterable = Object(collection);
                                    if (!isArrayLike(collection)) {
                                        var iteratee = getIteratee(predicate, 3);
                                        collection = keys(collection);
                                        predicate = function(key) { return iteratee(iterable[key], key, iterable); };
                                    }
                                    var index = findIndexFunc(collection, predicate, fromIndex);
                                    return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
                                };
                            }

                            /**
                             * Creates a `_.flow` or `_.flowRight` function.
                             *
                             * @private
                             * @param {boolean} [fromRight] Specify iterating from right to left.
                             * @returns {Function} Returns the new flow function.
                             */
                            function createFlow(fromRight) {
                                return flatRest(function(funcs) {
                                    var length = funcs.length,
                                        index = length,
                                        prereq = LodashWrapper.prototype.thru;

                                    if (fromRight) {
                                        funcs.reverse();
                                    }
                                    while (index--) {
                                        var func = funcs[index];
                                        if (typeof func != 'function') {
                                            throw new TypeError(FUNC_ERROR_TEXT);
                                        }
                                        if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
                                            var wrapper = new LodashWrapper([], true);
                                        }
                                    }
                                    index = wrapper ? index : length;
                                    while (++index < length) {
                                        func = funcs[index];

                                        var funcName = getFuncName(func),
                                            data = funcName == 'wrapper' ? getData(func) : undefined;

                                        if (data && isLaziable(data[0]) &&
                                            data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&
                                            !data[4].length && data[9] == 1
                                        ) {
                                            wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
                                        } else {
                                            wrapper = (func.length == 1 && isLaziable(func)) ?
                                                wrapper[funcName]() :
                                                wrapper.thru(func);
                                        }
                                    }
                                    return function() {
                                        var args = arguments,
                                            value = args[0];

                                        if (wrapper && args.length == 1 && isArray(value)) {
                                            return wrapper.plant(value).value();
                                        }
                                        var index = 0,
                                            result = length ? funcs[index].apply(this, args) : value;

                                        while (++index < length) {
                                            result = funcs[index].call(this, result);
                                        }
                                        return result;
                                    };
                                });
                            }

                            /**
                             * Creates a function that wraps `func` to invoke it with optional `this`
                             * binding of `thisArg`, partial application, and currying.
                             *
                             * @private
                             * @param {Function|string} func The function or method name to wrap.
                             * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
                             * @param {*} [thisArg] The `this` binding of `func`.
                             * @param {Array} [partials] The arguments to prepend to those provided to
                             *  the new function.
                             * @param {Array} [holders] The `partials` placeholder indexes.
                             * @param {Array} [partialsRight] The arguments to append to those provided
                             *  to the new function.
                             * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
                             * @param {Array} [argPos] The argument positions of the new function.
                             * @param {number} [ary] The arity cap of `func`.
                             * @param {number} [arity] The arity of `func`.
                             * @returns {Function} Returns the new wrapped function.
                             */
                            function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
                                var isAry = bitmask & WRAP_ARY_FLAG,
                                    isBind = bitmask & WRAP_BIND_FLAG,
                                    isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
                                    isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
                                    isFlip = bitmask & WRAP_FLIP_FLAG,
                                    Ctor = isBindKey ? undefined : createCtor(func);

                                function wrapper() {
                                    var length = arguments.length,
                                        args = Array(length),
                                        index = length;

                                    while (index--) {
                                        args[index] = arguments[index];
                                    }
                                    if (isCurried) {
                                        var placeholder = getHolder(wrapper),
                                            holdersCount = countHolders(args, placeholder);
                                    }
                                    if (partials) {
                                        args = composeArgs(args, partials, holders, isCurried);
                                    }
                                    if (partialsRight) {
                                        args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
                                    }
                                    length -= holdersCount;
                                    if (isCurried && length < arity) {
                                        var newHolders = replaceHolders(args, placeholder);
                                        return createRecurry(
                                            func, bitmask, createHybrid, wrapper.placeholder, thisArg,
                                            args, newHolders, argPos, ary, arity - length
                                        );
                                    }
                                    var thisBinding = isBind ? thisArg : this,
                                        fn = isBindKey ? thisBinding[func] : func;

                                    length = args.length;
                                    if (argPos) {
                                        args = reorder(args, argPos);
                                    } else if (isFlip && length > 1) {
                                        args.reverse();
                                    }
                                    if (isAry && ary < length) {
                                        args.length = ary;
                                    }
                                    if (this && this !== root && this instanceof wrapper) {
                                        fn = Ctor || createCtor(fn);
                                    }
                                    return fn.apply(thisBinding, args);
                                }
                                return wrapper;
                            }

                            /**
                             * Creates a function like `_.invertBy`.
                             *
                             * @private
                             * @param {Function} setter The function to set accumulator values.
                             * @param {Function} toIteratee The function to resolve iteratees.
                             * @returns {Function} Returns the new inverter function.
                             */
                            function createInverter(setter, toIteratee) {
                                return function(object, iteratee) {
                                    return baseInverter(object, setter, toIteratee(iteratee), {});
                                };
                            }

                            /**
                             * Creates a function that performs a mathematical operation on two values.
                             *
                             * @private
                             * @param {Function} operator The function to perform the operation.
                             * @param {number} [defaultValue] The value used for `undefined` arguments.
                             * @returns {Function} Returns the new mathematical operation function.
                             */
                            function createMathOperation(operator, defaultValue) {
                                return function(value, other) {
                                    var result;
                                    if (value === undefined && other === undefined) {
                                        return defaultValue;
                                    }
                                    if (value !== undefined) {
                                        result = value;
                                    }
                                    if (other !== undefined) {
                                        if (result === undefined) {
                                            return other;
                                        }
                                        if (typeof value == 'string' || typeof other == 'string') {
                                            value = baseToString(value);
                                            other = baseToString(other);
                                        } else {
                                            value = baseToNumber(value);
                                            other = baseToNumber(other);
                                        }
                                        result = operator(value, other);
                                    }
                                    return result;
                                };
                            }

                            /**
                             * Creates a function like `_.over`.
                             *
                             * @private
                             * @param {Function} arrayFunc The function to iterate over iteratees.
                             * @returns {Function} Returns the new over function.
                             */
                            function createOver(arrayFunc) {
                                return flatRest(function(iteratees) {
                                    iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
                                    return baseRest(function(args) {
                                        var thisArg = this;
                                        return arrayFunc(iteratees, function(iteratee) {
                                            return apply(iteratee, thisArg, args);
                                        });
                                    });
                                });
                            }

                            /**
                             * Creates the padding for `string` based on `length`. The `chars` string
                             * is truncated if the number of characters exceeds `length`.
                             *
                             * @private
                             * @param {number} length The padding length.
                             * @param {string} [chars=' '] The string used as padding.
                             * @returns {string} Returns the padding for `string`.
                             */
                            function createPadding(length, chars) {
                                chars = chars === undefined ? ' ' : baseToString(chars);

                                var charsLength = chars.length;
                                if (charsLength < 2) {
                                    return charsLength ? baseRepeat(chars, length) : chars;
                                }
                                var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
                                return hasUnicode(chars) ?
                                    castSlice(stringToArray(result), 0, length).join('') :
                                    result.slice(0, length);
                            }

                            /**
                             * Creates a function that wraps `func` to invoke it with the `this` binding
                             * of `thisArg` and `partials` prepended to the arguments it receives.
                             *
                             * @private
                             * @param {Function} func The function to wrap.
                             * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
                             * @param {*} thisArg The `this` binding of `func`.
                             * @param {Array} partials The arguments to prepend to those provided to
                             *  the new function.
                             * @returns {Function} Returns the new wrapped function.
                             */
                            function createPartial(func, bitmask, thisArg, partials) {
                                var isBind = bitmask & WRAP_BIND_FLAG,
                                    Ctor = createCtor(func);

                                function wrapper() {
                                    var argsIndex = -1,
                                        argsLength = arguments.length,
                                        leftIndex = -1,
                                        leftLength = partials.length,
                                        args = Array(leftLength + argsLength),
                                        fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;

                                    while (++leftIndex < leftLength) {
                                        args[leftIndex] = partials[leftIndex];
                                    }
                                    while (argsLength--) {
                                        args[leftIndex++] = arguments[++argsIndex];
                                    }
                                    return apply(fn, isBind ? thisArg : this, args);
                                }
                                return wrapper;
                            }

                            /**
                             * Creates a `_.range` or `_.rangeRight` function.
                             *
                             * @private
                             * @param {boolean} [fromRight] Specify iterating from right to left.
                             * @returns {Function} Returns the new range function.
                             */
                            function createRange(fromRight) {
                                return function(start, end, step) {
                                    if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
                                        end = step = undefined;
                                    }
                                    // Ensure the sign of `-0` is preserved.
                                    start = toFinite(start);
                                    if (end === undefined) {
                                        end = start;
                                        start = 0;
                                    } else {
                                        end = toFinite(end);
                                    }
                                    step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
                                    return baseRange(start, end, step, fromRight);
                                };
                            }

                            /**
                             * Creates a function that performs a relational operation on two values.
                             *
                             * @private
                             * @param {Function} operator The function to perform the operation.
                             * @returns {Function} Returns the new relational operation function.
                             */
                            function createRelationalOperation(operator) {
                                return function(value, other) {
                                    if (!(typeof value == 'string' && typeof other == 'string')) {
                                        value = toNumber(value);
                                        other = toNumber(other);
                                    }
                                    return operator(value, other);
                                };
                            }

                            /**
                             * Creates a function that wraps `func` to continue currying.
                             *
                             * @private
                             * @param {Function} func The function to wrap.
                             * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
                             * @param {Function} wrapFunc The function to create the `func` wrapper.
                             * @param {*} placeholder The placeholder value.
                             * @param {*} [thisArg] The `this` binding of `func`.
                             * @param {Array} [partials] The arguments to prepend to those provided to
                             *  the new function.
                             * @param {Array} [holders] The `partials` placeholder indexes.
                             * @param {Array} [argPos] The argument positions of the new function.
                             * @param {number} [ary] The arity cap of `func`.
                             * @param {number} [arity] The arity of `func`.
                             * @returns {Function} Returns the new wrapped function.
                             */
                            function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
                                var isCurry = bitmask & WRAP_CURRY_FLAG,
                                    newHolders = isCurry ? holders : undefined,
                                    newHoldersRight = isCurry ? undefined : holders,
                                    newPartials = isCurry ? partials : undefined,
                                    newPartialsRight = isCurry ? undefined : partials;

                                bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);
                                bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);

                                if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
                                    bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
                                }
                                var newData = [
                                    func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
                                    newHoldersRight, argPos, ary, arity
                                ];

                                var result = wrapFunc.apply(undefined, newData);
                                if (isLaziable(func)) {
                                    setData(result, newData);
                                }
                                result.placeholder = placeholder;
                                return setWrapToString(result, func, bitmask);
                            }

                            /**
                             * Creates a function like `_.round`.
                             *
                             * @private
                             * @param {string} methodName The name of the `Math` method to use when rounding.
                             * @returns {Function} Returns the new round function.
                             */
                            function createRound(methodName) {
                                var func = Math[methodName];
                                return function(number, precision) {
                                    number = toNumber(number);
                                    precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
                                    if (precision) {
                                        // Shift with exponential notation to avoid floating-point issues.
                                        // See [MDN](https://mdn.io/round#Examples) for more details.
                                        var pair = (toString(number) + 'e').split('e'),
                                            value = func(pair[0] + 'e' + (+pair[1] + precision));

                                        pair = (toString(value) + 'e').split('e');
                                        return +(pair[0] + 'e' + (+pair[1] - precision));
                                    }
                                    return func(number);
                                };
                            }

                            /**
                             * Creates a set object of `values`.
                             *
                             * @private
                             * @param {Array} values The values to add to the set.
                             * @returns {Object} Returns the new set.
                             */
                            var createSet = !(Set && (1 / setToArray(new Set([, -0]))[1]) == INFINITY) ? noop : function(values) {
                                return new Set(values);
                            };

                            /**
                             * Creates a `_.toPairs` or `_.toPairsIn` function.
                             *
                             * @private
                             * @param {Function} keysFunc The function to get the keys of a given object.
                             * @returns {Function} Returns the new pairs function.
                             */
                            function createToPairs(keysFunc) {
                                return function(object) {
                                    var tag = getTag(object);
                                    if (tag == mapTag) {
                                        return mapToArray(object);
                                    }
                                    if (tag == setTag) {
                                        return setToPairs(object);
                                    }
                                    return baseToPairs(object, keysFunc(object));
                                };
                            }

                            /**
                             * Creates a function that either curries or invokes `func` with optional
                             * `this` binding and partially applied arguments.
                             *
                             * @private
                             * @param {Function|string} func The function or method name to wrap.
                             * @param {number} bitmask The bitmask flags.
                             *    1 - `_.bind`
                             *    2 - `_.bindKey`
                             *    4 - `_.curry` or `_.curryRight` of a bound function
                             *    8 - `_.curry`
                             *   16 - `_.curryRight`
                             *   32 - `_.partial`
                             *   64 - `_.partialRight`
                             *  128 - `_.rearg`
                             *  256 - `_.ary`
                             *  512 - `_.flip`
                             * @param {*} [thisArg] The `this` binding of `func`.
                             * @param {Array} [partials] The arguments to be partially applied.
                             * @param {Array} [holders] The `partials` placeholder indexes.
                             * @param {Array} [argPos] The argument positions of the new function.
                             * @param {number} [ary] The arity cap of `func`.
                             * @param {number} [arity] The arity of `func`.
                             * @returns {Function} Returns the new wrapped function.
                             */
                            function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
                                var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
                                if (!isBindKey && typeof func != 'function') {
                                    throw new TypeError(FUNC_ERROR_TEXT);
                                }
                                var length = partials ? partials.length : 0;
                                if (!length) {
                                    bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
                                    partials = holders = undefined;
                                }
                                ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
                                arity = arity === undefined ? arity : toInteger(arity);
                                length -= holders ? holders.length : 0;

                                if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
                                    var partialsRight = partials,
                                        holdersRight = holders;

                                    partials = holders = undefined;
                                }
                                var data = isBindKey ? undefined : getData(func);

                                var newData = [
                                    func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
                                    argPos, ary, arity
                                ];

                                if (data) {
                                    mergeData(newData, data);
                                }
                                func = newData[0];
                                bitmask = newData[1];
                                thisArg = newData[2];
                                partials = newData[3];
                                holders = newData[4];
                                arity = newData[9] = newData[9] === undefined ?
                                    (isBindKey ? 0 : func.length) :
                                    nativeMax(newData[9] - length, 0);

                                if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
                                    bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
                                }
                                if (!bitmask || bitmask == WRAP_BIND_FLAG) {
                                    var result = createBind(func, bitmask, thisArg);
                                } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
                                    result = createCurry(func, bitmask, arity);
                                } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
                                    result = createPartial(func, bitmask, thisArg, partials);
                                } else {
                                    result = createHybrid.apply(undefined, newData);
                                }
                                var setter = data ? baseSetData : setData;
                                return setWrapToString(setter(result, newData), func, bitmask);
                            }

                            /**
                             * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
                             * of source objects to the destination object for all destination properties
                             * that resolve to `undefined`.
                             *
                             * @private
                             * @param {*} objValue The destination value.
                             * @param {*} srcValue The source value.
                             * @param {string} key The key of the property to assign.
                             * @param {Object} object The parent object of `objValue`.
                             * @returns {*} Returns the value to assign.
                             */
                            function customDefaultsAssignIn(objValue, srcValue, key, object) {
                                if (objValue === undefined ||
                                    (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
                                    return srcValue;
                                }
                                return objValue;
                            }

                            /**
                             * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
                             * objects into destination objects that are passed thru.
                             *
                             * @private
                             * @param {*} objValue The destination value.
                             * @param {*} srcValue The source value.
                             * @param {string} key The key of the property to merge.
                             * @param {Object} object The parent object of `objValue`.
                             * @param {Object} source The parent object of `srcValue`.
                             * @param {Object} [stack] Tracks traversed source values and their merged
                             *  counterparts.
                             * @returns {*} Returns the value to assign.
                             */
                            function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
                                if (isObject(objValue) && isObject(srcValue)) {
                                    // Recursively merge objects and arrays (susceptible to call stack limits).
                                    stack.set(srcValue, objValue);
                                    baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack);
                                    stack['delete'](srcValue);
                                }
                                return objValue;
                            }

                            /**
                             * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
                             * objects.
                             *
                             * @private
                             * @param {*} value The value to inspect.
                             * @param {string} key The key of the property to inspect.
                             * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
                             */
                            function customOmitClone(value) {
                                return isPlainObject(value) ? undefined : value;
                            }

                            /**
                             * A specialized version of `baseIsEqualDeep` for arrays with support for
                             * partial deep comparisons.
                             *
                             * @private
                             * @param {Array} array The array to compare.
                             * @param {Array} other The other array to compare.
                             * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
                             * @param {Function} customizer The function to customize comparisons.
                             * @param {Function} equalFunc The function to determine equivalents of values.
                             * @param {Object} stack Tracks traversed `array` and `other` objects.
                             * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
                             */
                            function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
                                var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
                                    arrLength = array.length,
                                    othLength = other.length;

                                if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
                                    return false;
                                }
                                // Assume cyclic values are equal.
                                var stacked = stack.get(array);
                                if (stacked && stack.get(other)) {
                                    return stacked == other;
                                }
                                var index = -1,
                                    result = true,
                                    seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;

                                stack.set(array, other);
                                stack.set(other, array);

                                // Ignore non-index properties.
                                while (++index < arrLength) {
                                    var arrValue = array[index],
                                        othValue = other[index];

                                    if (customizer) {
                                        var compared = isPartial ?
                                            customizer(othValue, arrValue, index, other, array, stack) :
                                            customizer(arrValue, othValue, index, array, other, stack);
                                    }
                                    if (compared !== undefined) {
                                        if (compared) {
                                            continue;
                                        }
                                        result = false;
                                        break;
                                    }
                                    // Recursively compare arrays (susceptible to call stack limits).
                                    if (seen) {
                                        if (!arraySome(other, function(othValue, othIndex) {
                                                if (!cacheHas(seen, othIndex) &&
                                                    (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
                                                    return seen.push(othIndex);
                                                }
                                            })) {
                                            result = false;
                                            break;
                                        }
                                    } else if (!(
                                            arrValue === othValue ||
                                            equalFunc(arrValue, othValue, bitmask, customizer, stack)
                                        )) {
                                        result = false;
                                        break;
                                    }
                                }
                                stack['delete'](array);
                                stack['delete'](other);
                                return result;
                            }

                            /**
                             * A specialized version of `baseIsEqualDeep` for comparing objects of
                             * the same `toStringTag`.
                             *
                             * **Note:** This function only supports comparing values with tags of
                             * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
                             *
                             * @private
                             * @param {Object} object The object to compare.
                             * @param {Object} other The other object to compare.
                             * @param {string} tag The `toStringTag` of the objects to compare.
                             * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
                             * @param {Function} customizer The function to customize comparisons.
                             * @param {Function} equalFunc The function to determine equivalents of values.
                             * @param {Object} stack Tracks traversed `object` and `other` objects.
                             * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
                             */
                            function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
                                switch (tag) {
                                    case dataViewTag:
                                        if ((object.byteLength != other.byteLength) ||
                                            (object.byteOffset != other.byteOffset)) {
                                            return false;
                                        }
                                        object = object.buffer;
                                        other = other.buffer;

                                    case arrayBufferTag:
                                        if ((object.byteLength != other.byteLength) ||
                                            !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
                                            return false;
                                        }
                                        return true;

                                    case boolTag:
                                    case dateTag:
                                    case numberTag:
                                        // Coerce booleans to `1` or `0` and dates to milliseconds.
                                        // Invalid dates are coerced to `NaN`.
                                        return eq(+object, +other);

                                    case errorTag:
                                        return object.name == other.name && object.message == other.message;

                                    case regexpTag:
                                    case stringTag:
                                        // Coerce regexes to strings and treat strings, primitives and objects,
                                        // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
                                        // for more details.
                                        return object == (other + '');

                                    case mapTag:
                                        var convert = mapToArray;

                                    case setTag:
                                        var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
                                        convert || (convert = setToArray);

                                        if (object.size != other.size && !isPartial) {
                                            return false;
                                        }
                                        // Assume cyclic values are equal.
                                        var stacked = stack.get(object);
                                        if (stacked) {
                                            return stacked == other;
                                        }
                                        bitmask |= COMPARE_UNORDERED_FLAG;

                                        // Recursively compare objects (susceptible to call stack limits).
                                        stack.set(object, other);
                                        var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
                                        stack['delete'](object);
                                        return result;

                                    case symbolTag:
                                        if (symbolValueOf) {
                                            return symbolValueOf.call(object) == symbolValueOf.call(other);
                                        }
                                }
                                return false;
                            }

                            /**
                             * A specialized version of `baseIsEqualDeep` for objects with support for
                             * partial deep comparisons.
                             *
                             * @private
                             * @param {Object} object The object to compare.
                             * @param {Object} other The other object to compare.
                             * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
                             * @param {Function} customizer The function to customize comparisons.
                             * @param {Function} equalFunc The function to determine equivalents of values.
                             * @param {Object} stack Tracks traversed `object` and `other` objects.
                             * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
                             */
                            function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
                                var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
                                    objProps = getAllKeys(object),
                                    objLength = objProps.length,
                                    othProps = getAllKeys(other),
                                    othLength = othProps.length;

                                if (objLength != othLength && !isPartial) {
                                    return false;
                                }
                                var index = objLength;
                                while (index--) {
                                    var key = objProps[index];
                                    if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
                                        return false;
                                    }
                                }
                                // Assume cyclic values are equal.
                                var stacked = stack.get(object);
                                if (stacked && stack.get(other)) {
                                    return stacked == other;
                                }
                                var result = true;
                                stack.set(object, other);
                                stack.set(other, object);

                                var skipCtor = isPartial;
                                while (++index < objLength) {
                                    key = objProps[index];
                                    var objValue = object[key],
                                        othValue = other[key];

                                    if (customizer) {
                                        var compared = isPartial ?
                                            customizer(othValue, objValue, key, other, object, stack) :
                                            customizer(objValue, othValue, key, object, other, stack);
                                    }
                                    // Recursively compare objects (susceptible to call stack limits).
                                    if (!(compared === undefined ?
                                            (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack)) :
                                            compared
                                        )) {
                                        result = false;
                                        break;
                                    }
                                    skipCtor || (skipCtor = key == 'constructor');
                                }
                                if (result && !skipCtor) {
                                    var objCtor = object.constructor,
                                        othCtor = other.constructor;

                                    // Non `Object` object instances with different constructors are not equal.
                                    if (objCtor != othCtor &&
                                        ('constructor' in object && 'constructor' in other) &&
                                        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
                                            typeof othCtor == 'function' && othCtor instanceof othCtor)) {
                                        result = false;
                                    }
                                }
                                stack['delete'](object);
                                stack['delete'](other);
                                return result;
                            }

                            /**
                             * A specialized version of `baseRest` which flattens the rest array.
                             *
                             * @private
                             * @param {Function} func The function to apply a rest parameter to.
                             * @returns {Function} Returns the new function.
                             */
                            function flatRest(func) {
                                return setToString(overRest(func, undefined, flatten), func + '');
                            }

                            /**
                             * Creates an array of own enumerable property names and symbols of `object`.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the array of property names and symbols.
                             */
                            function getAllKeys(object) {
                                return baseGetAllKeys(object, keys, getSymbols);
                            }

                            /**
                             * Creates an array of own and inherited enumerable property names and
                             * symbols of `object`.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the array of property names and symbols.
                             */
                            function getAllKeysIn(object) {
                                return baseGetAllKeys(object, keysIn, getSymbolsIn);
                            }

                            /**
                             * Gets metadata for `func`.
                             *
                             * @private
                             * @param {Function} func The function to query.
                             * @returns {*} Returns the metadata for `func`.
                             */
                            var getData = !metaMap ? noop : function(func) {
                                return metaMap.get(func);
                            };

                            /**
                             * Gets the name of `func`.
                             *
                             * @private
                             * @param {Function} func The function to query.
                             * @returns {string} Returns the function name.
                             */
                            function getFuncName(func) {
                                var result = (func.name + ''),
                                    array = realNames[result],
                                    length = hasOwnProperty.call(realNames, result) ? array.length : 0;

                                while (length--) {
                                    var data = array[length],
                                        otherFunc = data.func;
                                    if (otherFunc == null || otherFunc == func) {
                                        return data.name;
                                    }
                                }
                                return result;
                            }

                            /**
                             * Gets the argument placeholder value for `func`.
                             *
                             * @private
                             * @param {Function} func The function to inspect.
                             * @returns {*} Returns the placeholder value.
                             */
                            function getHolder(func) {
                                var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
                                return object.placeholder;
                            }

                            /**
                             * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
                             * this function returns the custom method, otherwise it returns `baseIteratee`.
                             * If arguments are provided, the chosen function is invoked with them and
                             * its result is returned.
                             *
                             * @private
                             * @param {*} [value] The value to convert to an iteratee.
                             * @param {number} [arity] The arity of the created iteratee.
                             * @returns {Function} Returns the chosen function or its result.
                             */
                            function getIteratee() {
                                var result = lodash.iteratee || iteratee;
                                result = result === iteratee ? baseIteratee : result;
                                return arguments.length ? result(arguments[0], arguments[1]) : result;
                            }

                            /**
                             * Gets the data for `map`.
                             *
                             * @private
                             * @param {Object} map The map to query.
                             * @param {string} key The reference key.
                             * @returns {*} Returns the map data.
                             */
                            function getMapData(map, key) {
                                var data = map.__data__;
                                return isKeyable(key) ?
                                    data[typeof key == 'string' ? 'string' : 'hash'] :
                                    data.map;
                            }

                            /**
                             * Gets the property names, values, and compare flags of `object`.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the match data of `object`.
                             */
                            function getMatchData(object) {
                                var result = keys(object),
                                    length = result.length;

                                while (length--) {
                                    var key = result[length],
                                        value = object[key];

                                    result[length] = [key, value, isStrictComparable(value)];
                                }
                                return result;
                            }

                            /**
                             * Gets the native function at `key` of `object`.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @param {string} key The key of the method to get.
                             * @returns {*} Returns the function if it's native, else `undefined`.
                             */
                            function getNative(object, key) {
                                var value = getValue(object, key);
                                return baseIsNative(value) ? value : undefined;
                            }

                            /**
                             * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
                             *
                             * @private
                             * @param {*} value The value to query.
                             * @returns {string} Returns the raw `toStringTag`.
                             */
                            function getRawTag(value) {
                                var isOwn = hasOwnProperty.call(value, symToStringTag),
                                    tag = value[symToStringTag];

                                try {
                                    value[symToStringTag] = undefined;
                                    var unmasked = true;
                                } catch (e) {}

                                var result = nativeObjectToString.call(value);
                                if (unmasked) {
                                    if (isOwn) {
                                        value[symToStringTag] = tag;
                                    } else {
                                        delete value[symToStringTag];
                                    }
                                }
                                return result;
                            }

                            /**
                             * Creates an array of the own enumerable symbols of `object`.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the array of symbols.
                             */
                            var getSymbols = !nativeGetSymbols ? stubArray : function(object) {
                                if (object == null) {
                                    return [];
                                }
                                object = Object(object);
                                return arrayFilter(nativeGetSymbols(object), function(symbol) {
                                    return propertyIsEnumerable.call(object, symbol);
                                });
                            };

                            /**
                             * Creates an array of the own and inherited enumerable symbols of `object`.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the array of symbols.
                             */
                            var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
                                var result = [];
                                while (object) {
                                    arrayPush(result, getSymbols(object));
                                    object = getPrototype(object);
                                }
                                return result;
                            };

                            /**
                             * Gets the `toStringTag` of `value`.
                             *
                             * @private
                             * @param {*} value The value to query.
                             * @returns {string} Returns the `toStringTag`.
                             */
                            var getTag = baseGetTag;

                            // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
                            if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
                                (Map && getTag(new Map) != mapTag) ||
                                (Promise && getTag(Promise.resolve()) != promiseTag) ||
                                (Set && getTag(new Set) != setTag) ||
                                (WeakMap && getTag(new WeakMap) != weakMapTag)) {
                                getTag = function(value) {
                                    var result = baseGetTag(value),
                                        Ctor = result == objectTag ? value.constructor : undefined,
                                        ctorString = Ctor ? toSource(Ctor) : '';

                                    if (ctorString) {
                                        switch (ctorString) {
                                            case dataViewCtorString:
                                                return dataViewTag;
                                            case mapCtorString:
                                                return mapTag;
                                            case promiseCtorString:
                                                return promiseTag;
                                            case setCtorString:
                                                return setTag;
                                            case weakMapCtorString:
                                                return weakMapTag;
                                        }
                                    }
                                    return result;
                                };
                            }

                            /**
                             * Gets the view, applying any `transforms` to the `start` and `end` positions.
                             *
                             * @private
                             * @param {number} start The start of the view.
                             * @param {number} end The end of the view.
                             * @param {Array} transforms The transformations to apply to the view.
                             * @returns {Object} Returns an object containing the `start` and `end`
                             *  positions of the view.
                             */
                            function getView(start, end, transforms) {
                                var index = -1,
                                    length = transforms.length;

                                while (++index < length) {
                                    var data = transforms[index],
                                        size = data.size;

                                    switch (data.type) {
                                        case 'drop':
                                            start += size;
                                            break;
                                        case 'dropRight':
                                            end -= size;
                                            break;
                                        case 'take':
                                            end = nativeMin(end, start + size);
                                            break;
                                        case 'takeRight':
                                            start = nativeMax(start, end - size);
                                            break;
                                    }
                                }
                                return { 'start': start, 'end': end };
                            }

                            /**
                             * Extracts wrapper details from the `source` body comment.
                             *
                             * @private
                             * @param {string} source The source to inspect.
                             * @returns {Array} Returns the wrapper details.
                             */
                            function getWrapDetails(source) {
                                var match = source.match(reWrapDetails);
                                return match ? match[1].split(reSplitDetails) : [];
                            }

                            /**
                             * Checks if `path` exists on `object`.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @param {Array|string} path The path to check.
                             * @param {Function} hasFunc The function to check properties.
                             * @returns {boolean} Returns `true` if `path` exists, else `false`.
                             */
                            function hasPath(object, path, hasFunc) {
                                path = castPath(path, object);

                                var index = -1,
                                    length = path.length,
                                    result = false;

                                while (++index < length) {
                                    var key = toKey(path[index]);
                                    if (!(result = object != null && hasFunc(object, key))) {
                                        break;
                                    }
                                    object = object[key];
                                }
                                if (result || ++index != length) {
                                    return result;
                                }
                                length = object == null ? 0 : object.length;
                                return !!length && isLength(length) && isIndex(key, length) &&
                                    (isArray(object) || isArguments(object));
                            }

                            /**
                             * Initializes an array clone.
                             *
                             * @private
                             * @param {Array} array The array to clone.
                             * @returns {Array} Returns the initialized clone.
                             */
                            function initCloneArray(array) {
                                var length = array.length,
                                    result = array.constructor(length);

                                // Add properties assigned by `RegExp#exec`.
                                if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
                                    result.index = array.index;
                                    result.input = array.input;
                                }
                                return result;
                            }

                            /**
                             * Initializes an object clone.
                             *
                             * @private
                             * @param {Object} object The object to clone.
                             * @returns {Object} Returns the initialized clone.
                             */
                            function initCloneObject(object) {
                                return (typeof object.constructor == 'function' && !isPrototype(object)) ?
                                    baseCreate(getPrototype(object)) : {};
                            }

                            /**
                             * Initializes an object clone based on its `toStringTag`.
                             *
                             * **Note:** This function only supports cloning values with tags of
                             * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
                             *
                             * @private
                             * @param {Object} object The object to clone.
                             * @param {string} tag The `toStringTag` of the object to clone.
                             * @param {Function} cloneFunc The function to clone values.
                             * @param {boolean} [isDeep] Specify a deep clone.
                             * @returns {Object} Returns the initialized clone.
                             */
                            function initCloneByTag(object, tag, cloneFunc, isDeep) {
                                var Ctor = object.constructor;
                                switch (tag) {
                                    case arrayBufferTag:
                                        return cloneArrayBuffer(object);

                                    case boolTag:
                                    case dateTag:
                                        return new Ctor(+object);

                                    case dataViewTag:
                                        return cloneDataView(object, isDeep);

                                    case float32Tag:
                                    case float64Tag:
                                    case int8Tag:
                                    case int16Tag:
                                    case int32Tag:
                                    case uint8Tag:
                                    case uint8ClampedTag:
                                    case uint16Tag:
                                    case uint32Tag:
                                        return cloneTypedArray(object, isDeep);

                                    case mapTag:
                                        return cloneMap(object, isDeep, cloneFunc);

                                    case numberTag:
                                    case stringTag:
                                        return new Ctor(object);

                                    case regexpTag:
                                        return cloneRegExp(object);

                                    case setTag:
                                        return cloneSet(object, isDeep, cloneFunc);

                                    case symbolTag:
                                        return cloneSymbol(object);
                                }
                            }

                            /**
                             * Inserts wrapper `details` in a comment at the top of the `source` body.
                             *
                             * @private
                             * @param {string} source The source to modify.
                             * @returns {Array} details The details to insert.
                             * @returns {string} Returns the modified source.
                             */
                            function insertWrapDetails(source, details) {
                                var length = details.length;
                                if (!length) {
                                    return source;
                                }
                                var lastIndex = length - 1;
                                details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
                                details = details.join(length > 2 ? ', ' : ' ');
                                return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
                            }

                            /**
                             * Checks if `value` is a flattenable `arguments` object or array.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
                             */
                            function isFlattenable(value) {
                                return isArray(value) || isArguments(value) ||
                                    !!(spreadableSymbol && value && value[spreadableSymbol]);
                            }

                            /**
                             * Checks if `value` is a valid array-like index.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
                             * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
                             */
                            function isIndex(value, length) {
                                length = length == null ? MAX_SAFE_INTEGER : length;
                                return !!length &&
                                    (typeof value == 'number' || reIsUint.test(value)) &&
                                    (value > -1 && value % 1 == 0 && value < length);
                            }

                            /**
                             * Checks if the given arguments are from an iteratee call.
                             *
                             * @private
                             * @param {*} value The potential iteratee value argument.
                             * @param {*} index The potential iteratee index or key argument.
                             * @param {*} object The potential iteratee object argument.
                             * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
                             *  else `false`.
                             */
                            function isIterateeCall(value, index, object) {
                                if (!isObject(object)) {
                                    return false;
                                }
                                var type = typeof index;
                                if (type == 'number' ?
                                    (isArrayLike(object) && isIndex(index, object.length)) :
                                    (type == 'string' && index in object)
                                ) {
                                    return eq(object[index], value);
                                }
                                return false;
                            }

                            /**
                             * Checks if `value` is a property name and not a property path.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @param {Object} [object] The object to query keys on.
                             * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
                             */
                            function isKey(value, object) {
                                if (isArray(value)) {
                                    return false;
                                }
                                var type = typeof value;
                                if (type == 'number' || type == 'symbol' || type == 'boolean' ||
                                    value == null || isSymbol(value)) {
                                    return true;
                                }
                                return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
                                    (object != null && value in Object(object));
                            }

                            /**
                             * Checks if `value` is suitable for use as unique object key.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
                             */
                            function isKeyable(value) {
                                var type = typeof value;
                                return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean') ?
                                    (value !== '__proto__') :
                                    (value === null);
                            }

                            /**
                             * Checks if `func` has a lazy counterpart.
                             *
                             * @private
                             * @param {Function} func The function to check.
                             * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
                             *  else `false`.
                             */
                            function isLaziable(func) {
                                var funcName = getFuncName(func),
                                    other = lodash[funcName];

                                if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
                                    return false;
                                }
                                if (func === other) {
                                    return true;
                                }
                                var data = getData(other);
                                return !!data && func === data[0];
                            }

                            /**
                             * Checks if `func` has its source masked.
                             *
                             * @private
                             * @param {Function} func The function to check.
                             * @returns {boolean} Returns `true` if `func` is masked, else `false`.
                             */
                            function isMasked(func) {
                                return !!maskSrcKey && (maskSrcKey in func);
                            }

                            /**
                             * Checks if `func` is capable of being masked.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
                             */
                            var isMaskable = coreJsData ? isFunction : stubFalse;

                            /**
                             * Checks if `value` is likely a prototype object.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
                             */
                            function isPrototype(value) {
                                var Ctor = value && value.constructor,
                                    proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;

                                return value === proto;
                            }

                            /**
                             * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
                             *
                             * @private
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` if suitable for strict
                             *  equality comparisons, else `false`.
                             */
                            function isStrictComparable(value) {
                                return value === value && !isObject(value);
                            }

                            /**
                             * A specialized version of `matchesProperty` for source values suitable
                             * for strict equality comparisons, i.e. `===`.
                             *
                             * @private
                             * @param {string} key The key of the property to get.
                             * @param {*} srcValue The value to match.
                             * @returns {Function} Returns the new spec function.
                             */
                            function matchesStrictComparable(key, srcValue) {
                                return function(object) {
                                    if (object == null) {
                                        return false;
                                    }
                                    return object[key] === srcValue &&
                                        (srcValue !== undefined || (key in Object(object)));
                                };
                            }

                            /**
                             * A specialized version of `_.memoize` which clears the memoized function's
                             * cache when it exceeds `MAX_MEMOIZE_SIZE`.
                             *
                             * @private
                             * @param {Function} func The function to have its output memoized.
                             * @returns {Function} Returns the new memoized function.
                             */
                            function memoizeCapped(func) {
                                var result = memoize(func, function(key) {
                                    if (cache.size === MAX_MEMOIZE_SIZE) {
                                        cache.clear();
                                    }
                                    return key;
                                });

                                var cache = result.cache;
                                return result;
                            }

                            /**
                             * Merges the function metadata of `source` into `data`.
                             *
                             * Merging metadata reduces the number of wrappers used to invoke a function.
                             * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
                             * may be applied regardless of execution order. Methods like `_.ary` and
                             * `_.rearg` modify function arguments, making the order in which they are
                             * executed important, preventing the merging of metadata. However, we make
                             * an exception for a safe combined case where curried functions have `_.ary`
                             * and or `_.rearg` applied.
                             *
                             * @private
                             * @param {Array} data The destination metadata.
                             * @param {Array} source The source metadata.
                             * @returns {Array} Returns `data`.
                             */
                            function mergeData(data, source) {
                                var bitmask = data[1],
                                    srcBitmask = source[1],
                                    newBitmask = bitmask | srcBitmask,
                                    isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);

                                var isCombo =
                                    ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||
                                    ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||
                                    ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));

                                // Exit early if metadata can't be merged.
                                if (!(isCommon || isCombo)) {
                                    return data;
                                }
                                // Use source `thisArg` if available.
                                if (srcBitmask & WRAP_BIND_FLAG) {
                                    data[2] = source[2];
                                    // Set when currying a bound function.
                                    newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
                                }
                                // Compose partial arguments.
                                var value = source[3];
                                if (value) {
                                    var partials = data[3];
                                    data[3] = partials ? composeArgs(partials, value, source[4]) : value;
                                    data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
                                }
                                // Compose partial right arguments.
                                value = source[5];
                                if (value) {
                                    partials = data[5];
                                    data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
                                    data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
                                }
                                // Use source `argPos` if available.
                                value = source[7];
                                if (value) {
                                    data[7] = value;
                                }
                                // Use source `ary` if it's smaller.
                                if (srcBitmask & WRAP_ARY_FLAG) {
                                    data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
                                }
                                // Use source `arity` if one is not provided.
                                if (data[9] == null) {
                                    data[9] = source[9];
                                }
                                // Use source `func` and merge bitmasks.
                                data[0] = source[0];
                                data[1] = newBitmask;

                                return data;
                            }

                            /**
                             * This function is like
                             * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
                             * except that it includes inherited enumerable properties.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the array of property names.
                             */
                            function nativeKeysIn(object) {
                                var result = [];
                                if (object != null) {
                                    for (var key in Object(object)) {
                                        result.push(key);
                                    }
                                }
                                return result;
                            }

                            /**
                             * Converts `value` to a string using `Object.prototype.toString`.
                             *
                             * @private
                             * @param {*} value The value to convert.
                             * @returns {string} Returns the converted string.
                             */
                            function objectToString(value) {
                                return nativeObjectToString.call(value);
                            }

                            /**
                             * A specialized version of `baseRest` which transforms the rest array.
                             *
                             * @private
                             * @param {Function} func The function to apply a rest parameter to.
                             * @param {number} [start=func.length-1] The start position of the rest parameter.
                             * @param {Function} transform The rest array transform.
                             * @returns {Function} Returns the new function.
                             */
                            function overRest(func, start, transform) {
                                start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
                                return function() {
                                    var args = arguments,
                                        index = -1,
                                        length = nativeMax(args.length - start, 0),
                                        array = Array(length);

                                    while (++index < length) {
                                        array[index] = args[start + index];
                                    }
                                    index = -1;
                                    var otherArgs = Array(start + 1);
                                    while (++index < start) {
                                        otherArgs[index] = args[index];
                                    }
                                    otherArgs[start] = transform(array);
                                    return apply(func, this, otherArgs);
                                };
                            }

                            /**
                             * Gets the parent value at `path` of `object`.
                             *
                             * @private
                             * @param {Object} object The object to query.
                             * @param {Array} path The path to get the parent value of.
                             * @returns {*} Returns the parent value.
                             */
                            function parent(object, path) {
                                return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
                            }

                            /**
                             * Reorder `array` according to the specified indexes where the element at
                             * the first index is assigned as the first element, the element at
                             * the second index is assigned as the second element, and so on.
                             *
                             * @private
                             * @param {Array} array The array to reorder.
                             * @param {Array} indexes The arranged array indexes.
                             * @returns {Array} Returns `array`.
                             */
                            function reorder(array, indexes) {
                                var arrLength = array.length,
                                    length = nativeMin(indexes.length, arrLength),
                                    oldArray = copyArray(array);

                                while (length--) {
                                    var index = indexes[length];
                                    array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
                                }
                                return array;
                            }

                            /**
                             * Sets metadata for `func`.
                             *
                             * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
                             * period of time, it will trip its breaker and transition to an identity
                             * function to avoid garbage collection pauses in V8. See
                             * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
                             * for more details.
                             *
                             * @private
                             * @param {Function} func The function to associate metadata with.
                             * @param {*} data The metadata.
                             * @returns {Function} Returns `func`.
                             */
                            var setData = shortOut(baseSetData);

                            /**
                             * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
                             *
                             * @private
                             * @param {Function} func The function to delay.
                             * @param {number} wait The number of milliseconds to delay invocation.
                             * @returns {number|Object} Returns the timer id or timeout object.
                             */
                            var setTimeout = ctxSetTimeout || function(func, wait) {
                                return root.setTimeout(func, wait);
                            };

                            /**
                             * Sets the `toString` method of `func` to return `string`.
                             *
                             * @private
                             * @param {Function} func The function to modify.
                             * @param {Function} string The `toString` result.
                             * @returns {Function} Returns `func`.
                             */
                            var setToString = shortOut(baseSetToString);

                            /**
                             * Sets the `toString` method of `wrapper` to mimic the source of `reference`
                             * with wrapper details in a comment at the top of the source body.
                             *
                             * @private
                             * @param {Function} wrapper The function to modify.
                             * @param {Function} reference The reference function.
                             * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
                             * @returns {Function} Returns `wrapper`.
                             */
                            function setWrapToString(wrapper, reference, bitmask) {
                                var source = (reference + '');
                                return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
                            }

                            /**
                             * Creates a function that'll short out and invoke `identity` instead
                             * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
                             * milliseconds.
                             *
                             * @private
                             * @param {Function} func The function to restrict.
                             * @returns {Function} Returns the new shortable function.
                             */
                            function shortOut(func) {
                                var count = 0,
                                    lastCalled = 0;

                                return function() {
                                    var stamp = nativeNow(),
                                        remaining = HOT_SPAN - (stamp - lastCalled);

                                    lastCalled = stamp;
                                    if (remaining > 0) {
                                        if (++count >= HOT_COUNT) {
                                            return arguments[0];
                                        }
                                    } else {
                                        count = 0;
                                    }
                                    return func.apply(undefined, arguments);
                                };
                            }

                            /**
                             * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
                             *
                             * @private
                             * @param {Array} array The array to shuffle.
                             * @param {number} [size=array.length] The size of `array`.
                             * @returns {Array} Returns `array`.
                             */
                            function shuffleSelf(array, size) {
                                var index = -1,
                                    length = array.length,
                                    lastIndex = length - 1;

                                size = size === undefined ? length : size;
                                while (++index < size) {
                                    var rand = baseRandom(index, lastIndex),
                                        value = array[rand];

                                    array[rand] = array[index];
                                    array[index] = value;
                                }
                                array.length = size;
                                return array;
                            }

                            /**
                             * Converts `string` to a property path array.
                             *
                             * @private
                             * @param {string} string The string to convert.
                             * @returns {Array} Returns the property path array.
                             */
                            var stringToPath = memoizeCapped(function(string) {
                                var result = [];
                                if (reLeadingDot.test(string)) {
                                    result.push('');
                                }
                                string.replace(rePropName, function(match, number, quote, string) {
                                    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
                                });
                                return result;
                            });

                            /**
                             * Converts `value` to a string key if it's not a string or symbol.
                             *
                             * @private
                             * @param {*} value The value to inspect.
                             * @returns {string|symbol} Returns the key.
                             */
                            function toKey(value) {
                                if (typeof value == 'string' || isSymbol(value)) {
                                    return value;
                                }
                                var result = (value + '');
                                return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
                            }

                            /**
                             * Converts `func` to its source code.
                             *
                             * @private
                             * @param {Function} func The function to convert.
                             * @returns {string} Returns the source code.
                             */
                            function toSource(func) {
                                if (func != null) {
                                    try {
                                        return funcToString.call(func);
                                    } catch (e) {}
                                    try {
                                        return (func + '');
                                    } catch (e) {}
                                }
                                return '';
                            }

                            /**
                             * Updates wrapper `details` based on `bitmask` flags.
                             *
                             * @private
                             * @returns {Array} details The details to modify.
                             * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
                             * @returns {Array} Returns `details`.
                             */
                            function updateWrapDetails(details, bitmask) {
                                arrayEach(wrapFlags, function(pair) {
                                    var value = '_.' + pair[0];
                                    if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
                                        details.push(value);
                                    }
                                });
                                return details.sort();
                            }

                            /**
                             * Creates a clone of `wrapper`.
                             *
                             * @private
                             * @param {Object} wrapper The wrapper to clone.
                             * @returns {Object} Returns the cloned wrapper.
                             */
                            function wrapperClone(wrapper) {
                                if (wrapper instanceof LazyWrapper) {
                                    return wrapper.clone();
                                }
                                var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
                                result.__actions__ = copyArray(wrapper.__actions__);
                                result.__index__ = wrapper.__index__;
                                result.__values__ = wrapper.__values__;
                                return result;
                            }

                            /*------------------------------------------------------------------------*/

                            /**
                             * Creates an array of elements split into groups the length of `size`.
                             * If `array` can't be split evenly, the final chunk will be the remaining
                             * elements.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Array
                             * @param {Array} array The array to process.
                             * @param {number} [size=1] The length of each chunk
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {Array} Returns the new array of chunks.
                             * @example
                             *
                             * _.chunk(['a', 'b', 'c', 'd'], 2);
                             * // => [['a', 'b'], ['c', 'd']]
                             *
                             * _.chunk(['a', 'b', 'c', 'd'], 3);
                             * // => [['a', 'b', 'c'], ['d']]
                             */
                            function chunk(array, size, guard) {
                                if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
                                    size = 1;
                                } else {
                                    size = nativeMax(toInteger(size), 0);
                                }
                                var length = array == null ? 0 : array.length;
                                if (!length || size < 1) {
                                    return [];
                                }
                                var index = 0,
                                    resIndex = 0,
                                    result = Array(nativeCeil(length / size));

                                while (index < length) {
                                    result[resIndex++] = baseSlice(array, index, (index += size));
                                }
                                return result;
                            }

                            /**
                             * Creates an array with all falsey values removed. The values `false`, `null`,
                             * `0`, `""`, `undefined`, and `NaN` are falsey.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {Array} array The array to compact.
                             * @returns {Array} Returns the new array of filtered values.
                             * @example
                             *
                             * _.compact([0, 1, false, 2, '', 3]);
                             * // => [1, 2, 3]
                             */
                            function compact(array) {
                                var index = -1,
                                    length = array == null ? 0 : array.length,
                                    resIndex = 0,
                                    result = [];

                                while (++index < length) {
                                    var value = array[index];
                                    if (value) {
                                        result[resIndex++] = value;
                                    }
                                }
                                return result;
                            }

                            /**
                             * Creates a new array concatenating `array` with any additional arrays
                             * and/or values.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to concatenate.
                             * @param {...*} [values] The values to concatenate.
                             * @returns {Array} Returns the new concatenated array.
                             * @example
                             *
                             * var array = [1];
                             * var other = _.concat(array, 2, [3], [[4]]);
                             *
                             * console.log(other);
                             * // => [1, 2, 3, [4]]
                             *
                             * console.log(array);
                             * // => [1]
                             */
                            function concat() {
                                var length = arguments.length;
                                if (!length) {
                                    return [];
                                }
                                var args = Array(length - 1),
                                    array = arguments[0],
                                    index = length;

                                while (index--) {
                                    args[index - 1] = arguments[index];
                                }
                                return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
                            }

                            /**
                             * Creates an array of `array` values not included in the other given arrays
                             * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
                             * for equality comparisons. The order and references of result values are
                             * determined by the first array.
                             *
                             * **Note:** Unlike `_.pullAll`, this method returns a new array.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {...Array} [values] The values to exclude.
                             * @returns {Array} Returns the new array of filtered values.
                             * @see _.without, _.xor
                             * @example
                             *
                             * _.difference([2, 1], [2, 3]);
                             * // => [1]
                             */
                            var difference = baseRest(function(array, values) {
                                return isArrayLikeObject(array) ?
                                    baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true)) : [];
                            });

                            /**
                             * This method is like `_.difference` except that it accepts `iteratee` which
                             * is invoked for each element of `array` and `values` to generate the criterion
                             * by which they're compared. The order and references of result values are
                             * determined by the first array. The iteratee is invoked with one argument:
                             * (value).
                             *
                             * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {...Array} [values] The values to exclude.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {Array} Returns the new array of filtered values.
                             * @example
                             *
                             * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
                             * // => [1.2]
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
                             * // => [{ 'x': 2 }]
                             */
                            var differenceBy = baseRest(function(array, values) {
                                var iteratee = last(values);
                                if (isArrayLikeObject(iteratee)) {
                                    iteratee = undefined;
                                }
                                return isArrayLikeObject(array) ?
                                    baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2)) : [];
                            });

                            /**
                             * This method is like `_.difference` except that it accepts `comparator`
                             * which is invoked to compare elements of `array` to `values`. The order and
                             * references of result values are determined by the first array. The comparator
                             * is invoked with two arguments: (arrVal, othVal).
                             *
                             * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {...Array} [values] The values to exclude.
                             * @param {Function} [comparator] The comparator invoked per element.
                             * @returns {Array} Returns the new array of filtered values.
                             * @example
                             *
                             * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
                             *
                             * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
                             * // => [{ 'x': 2, 'y': 1 }]
                             */
                            var differenceWith = baseRest(function(array, values) {
                                var comparator = last(values);
                                if (isArrayLikeObject(comparator)) {
                                    comparator = undefined;
                                }
                                return isArrayLikeObject(array) ?
                                    baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator) : [];
                            });

                            /**
                             * Creates a slice of `array` with `n` elements dropped from the beginning.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.5.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @param {number} [n=1] The number of elements to drop.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {Array} Returns the slice of `array`.
                             * @example
                             *
                             * _.drop([1, 2, 3]);
                             * // => [2, 3]
                             *
                             * _.drop([1, 2, 3], 2);
                             * // => [3]
                             *
                             * _.drop([1, 2, 3], 5);
                             * // => []
                             *
                             * _.drop([1, 2, 3], 0);
                             * // => [1, 2, 3]
                             */
                            function drop(array, n, guard) {
                                var length = array == null ? 0 : array.length;
                                if (!length) {
                                    return [];
                                }
                                n = (guard || n === undefined) ? 1 : toInteger(n);
                                return baseSlice(array, n < 0 ? 0 : n, length);
                            }

                            /**
                             * Creates a slice of `array` with `n` elements dropped from the end.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @param {number} [n=1] The number of elements to drop.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {Array} Returns the slice of `array`.
                             * @example
                             *
                             * _.dropRight([1, 2, 3]);
                             * // => [1, 2]
                             *
                             * _.dropRight([1, 2, 3], 2);
                             * // => [1]
                             *
                             * _.dropRight([1, 2, 3], 5);
                             * // => []
                             *
                             * _.dropRight([1, 2, 3], 0);
                             * // => [1, 2, 3]
                             */
                            function dropRight(array, n, guard) {
                                var length = array == null ? 0 : array.length;
                                if (!length) {
                                    return [];
                                }
                                n = (guard || n === undefined) ? 1 : toInteger(n);
                                n = length - n;
                                return baseSlice(array, 0, n < 0 ? 0 : n);
                            }

                            /**
                             * Creates a slice of `array` excluding elements dropped from the end.
                             * Elements are dropped until `predicate` returns falsey. The predicate is
                             * invoked with three arguments: (value, index, array).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the slice of `array`.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney',  'active': true },
                             *   { 'user': 'fred',    'active': false },
                             *   { 'user': 'pebbles', 'active': false }
                             * ];
                             *
                             * _.dropRightWhile(users, function(o) { return !o.active; });
                             * // => objects for ['barney']
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
                             * // => objects for ['barney', 'fred']
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.dropRightWhile(users, ['active', false]);
                             * // => objects for ['barney']
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.dropRightWhile(users, 'active');
                             * // => objects for ['barney', 'fred', 'pebbles']
                             */
                            function dropRightWhile(array, predicate) {
                                return (array && array.length) ?
                                    baseWhile(array, getIteratee(predicate, 3), true, true) : [];
                            }

                            /**
                             * Creates a slice of `array` excluding elements dropped from the beginning.
                             * Elements are dropped until `predicate` returns falsey. The predicate is
                             * invoked with three arguments: (value, index, array).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the slice of `array`.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney',  'active': false },
                             *   { 'user': 'fred',    'active': false },
                             *   { 'user': 'pebbles', 'active': true }
                             * ];
                             *
                             * _.dropWhile(users, function(o) { return !o.active; });
                             * // => objects for ['pebbles']
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.dropWhile(users, { 'user': 'barney', 'active': false });
                             * // => objects for ['fred', 'pebbles']
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.dropWhile(users, ['active', false]);
                             * // => objects for ['pebbles']
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.dropWhile(users, 'active');
                             * // => objects for ['barney', 'fred', 'pebbles']
                             */
                            function dropWhile(array, predicate) {
                                return (array && array.length) ?
                                    baseWhile(array, getIteratee(predicate, 3), true) : [];
                            }

                            /**
                             * Fills elements of `array` with `value` from `start` up to, but not
                             * including, `end`.
                             *
                             * **Note:** This method mutates `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.2.0
                             * @category Array
                             * @param {Array} array The array to fill.
                             * @param {*} value The value to fill `array` with.
                             * @param {number} [start=0] The start position.
                             * @param {number} [end=array.length] The end position.
                             * @returns {Array} Returns `array`.
                             * @example
                             *
                             * var array = [1, 2, 3];
                             *
                             * _.fill(array, 'a');
                             * console.log(array);
                             * // => ['a', 'a', 'a']
                             *
                             * _.fill(Array(3), 2);
                             * // => [2, 2, 2]
                             *
                             * _.fill([4, 6, 8, 10], '*', 1, 3);
                             * // => [4, '*', '*', 10]
                             */
                            function fill(array, value, start, end) {
                                var length = array == null ? 0 : array.length;
                                if (!length) {
                                    return [];
                                }
                                if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
                                    start = 0;
                                    end = length;
                                }
                                return baseFill(array, value, start, end);
                            }

                            /**
                             * This method is like `_.find` except that it returns the index of the first
                             * element `predicate` returns truthy for instead of the element itself.
                             *
                             * @static
                             * @memberOf _
                             * @since 1.1.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @param {number} [fromIndex=0] The index to search from.
                             * @returns {number} Returns the index of the found element, else `-1`.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney',  'active': false },
                             *   { 'user': 'fred',    'active': false },
                             *   { 'user': 'pebbles', 'active': true }
                             * ];
                             *
                             * _.findIndex(users, function(o) { return o.user == 'barney'; });
                             * // => 0
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.findIndex(users, { 'user': 'fred', 'active': false });
                             * // => 1
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.findIndex(users, ['active', false]);
                             * // => 0
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.findIndex(users, 'active');
                             * // => 2
                             */
                            function findIndex(array, predicate, fromIndex) {
                                var length = array == null ? 0 : array.length;
                                if (!length) {
                                    return -1;
                                }
                                var index = fromIndex == null ? 0 : toInteger(fromIndex);
                                if (index < 0) {
                                    index = nativeMax(length + index, 0);
                                }
                                return baseFindIndex(array, getIteratee(predicate, 3), index);
                            }

                            /**
                             * This method is like `_.findIndex` except that it iterates over elements
                             * of `collection` from right to left.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.0.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @param {number} [fromIndex=array.length-1] The index to search from.
                             * @returns {number} Returns the index of the found element, else `-1`.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney',  'active': true },
                             *   { 'user': 'fred',    'active': false },
                             *   { 'user': 'pebbles', 'active': false }
                             * ];
                             *
                             * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
                             * // => 2
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.findLastIndex(users, { 'user': 'barney', 'active': true });
                             * // => 0
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.findLastIndex(users, ['active', false]);
                             * // => 2
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.findLastIndex(users, 'active');
                             * // => 0
                             */
                            function findLastIndex(array, predicate, fromIndex) {
                                var length = array == null ? 0 : array.length;
                                if (!length) {
                                    return -1;
                                }
                                var index = length - 1;
                                if (fromIndex !== undefined) {
                                    index = toInteger(fromIndex);
                                    index = fromIndex < 0 ?
                                        nativeMax(length + index, 0) :
                                        nativeMin(index, length - 1);
                                }
                                return baseFindIndex(array, getIteratee(predicate, 3), index, true);
                            }

                            /**
                             * Flattens `array` a single level deep.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {Array} array The array to flatten.
                             * @returns {Array} Returns the new flattened array.
                             * @example
                             *
                             * _.flatten([1, [2, [3, [4]], 5]]);
                             * // => [1, 2, [3, [4]], 5]
                             */
                            function flatten(array) {
                                var length = array == null ? 0 : array.length;
                                return length ? baseFlatten(array, 1) : [];
                            }

                            /**
                             * Recursively flattens `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Array
                             * @param {Array} array The array to flatten.
                             * @returns {Array} Returns the new flattened array.
                             * @example
                             *
                             * _.flattenDeep([1, [2, [3, [4]], 5]]);
                             * // => [1, 2, 3, 4, 5]
                             */
                            function flattenDeep(array) {
                                var length = array == null ? 0 : array.length;
                                return length ? baseFlatten(array, INFINITY) : [];
                            }

                            /**
                             * Recursively flatten `array` up to `depth` times.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.4.0
                             * @category Array
                             * @param {Array} array The array to flatten.
                             * @param {number} [depth=1] The maximum recursion depth.
                             * @returns {Array} Returns the new flattened array.
                             * @example
                             *
                             * var array = [1, [2, [3, [4]], 5]];
                             *
                             * _.flattenDepth(array, 1);
                             * // => [1, 2, [3, [4]], 5]
                             *
                             * _.flattenDepth(array, 2);
                             * // => [1, 2, 3, [4], 5]
                             */
                            function flattenDepth(array, depth) {
                                var length = array == null ? 0 : array.length;
                                if (!length) {
                                    return [];
                                }
                                depth = depth === undefined ? 1 : toInteger(depth);
                                return baseFlatten(array, depth);
                            }

                            /**
                             * The inverse of `_.toPairs`; this method returns an object composed
                             * from key-value `pairs`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} pairs The key-value pairs.
                             * @returns {Object} Returns the new object.
                             * @example
                             *
                             * _.fromPairs([['a', 1], ['b', 2]]);
                             * // => { 'a': 1, 'b': 2 }
                             */
                            function fromPairs(pairs) {
                                var index = -1,
                                    length = pairs == null ? 0 : pairs.length,
                                    result = {};

                                while (++index < length) {
                                    var pair = pairs[index];
                                    result[pair[0]] = pair[1];
                                }
                                return result;
                            }

                            /**
                             * Gets the first element of `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @alias first
                             * @category Array
                             * @param {Array} array The array to query.
                             * @returns {*} Returns the first element of `array`.
                             * @example
                             *
                             * _.head([1, 2, 3]);
                             * // => 1
                             *
                             * _.head([]);
                             * // => undefined
                             */
                            function head(array) {
                                return (array && array.length) ? array[0] : undefined;
                            }

                            /**
                             * Gets the index at which the first occurrence of `value` is found in `array`
                             * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
                             * for equality comparisons. If `fromIndex` is negative, it's used as the
                             * offset from the end of `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {*} value The value to search for.
                             * @param {number} [fromIndex=0] The index to search from.
                             * @returns {number} Returns the index of the matched value, else `-1`.
                             * @example
                             *
                             * _.indexOf([1, 2, 1, 2], 2);
                             * // => 1
                             *
                             * // Search from the `fromIndex`.
                             * _.indexOf([1, 2, 1, 2], 2, 2);
                             * // => 3
                             */
                            function indexOf(array, value, fromIndex) {
                                var length = array == null ? 0 : array.length;
                                if (!length) {
                                    return -1;
                                }
                                var index = fromIndex == null ? 0 : toInteger(fromIndex);
                                if (index < 0) {
                                    index = nativeMax(length + index, 0);
                                }
                                return baseIndexOf(array, value, index);
                            }

                            /**
                             * Gets all but the last element of `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @returns {Array} Returns the slice of `array`.
                             * @example
                             *
                             * _.initial([1, 2, 3]);
                             * // => [1, 2]
                             */
                            function initial(array) {
                                var length = array == null ? 0 : array.length;
                                return length ? baseSlice(array, 0, -1) : [];
                            }

                            /**
                             * Creates an array of unique values that are included in all given arrays
                             * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
                             * for equality comparisons. The order and references of result values are
                             * determined by the first array.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {...Array} [arrays] The arrays to inspect.
                             * @returns {Array} Returns the new array of intersecting values.
                             * @example
                             *
                             * _.intersection([2, 1], [2, 3]);
                             * // => [2]
                             */
                            var intersection = baseRest(function(arrays) {
                                var mapped = arrayMap(arrays, castArrayLikeObject);
                                return (mapped.length && mapped[0] === arrays[0]) ?
                                    baseIntersection(mapped) : [];
                            });

                            /**
                             * This method is like `_.intersection` except that it accepts `iteratee`
                             * which is invoked for each element of each `arrays` to generate the criterion
                             * by which they're compared. The order and references of result values are
                             * determined by the first array. The iteratee is invoked with one argument:
                             * (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {...Array} [arrays] The arrays to inspect.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {Array} Returns the new array of intersecting values.
                             * @example
                             *
                             * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
                             * // => [2.1]
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
                             * // => [{ 'x': 1 }]
                             */
                            var intersectionBy = baseRest(function(arrays) {
                                var iteratee = last(arrays),
                                    mapped = arrayMap(arrays, castArrayLikeObject);

                                if (iteratee === last(mapped)) {
                                    iteratee = undefined;
                                } else {
                                    mapped.pop();
                                }
                                return (mapped.length && mapped[0] === arrays[0]) ?
                                    baseIntersection(mapped, getIteratee(iteratee, 2)) : [];
                            });

                            /**
                             * This method is like `_.intersection` except that it accepts `comparator`
                             * which is invoked to compare elements of `arrays`. The order and references
                             * of result values are determined by the first array. The comparator is
                             * invoked with two arguments: (arrVal, othVal).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {...Array} [arrays] The arrays to inspect.
                             * @param {Function} [comparator] The comparator invoked per element.
                             * @returns {Array} Returns the new array of intersecting values.
                             * @example
                             *
                             * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
                             * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
                             *
                             * _.intersectionWith(objects, others, _.isEqual);
                             * // => [{ 'x': 1, 'y': 2 }]
                             */
                            var intersectionWith = baseRest(function(arrays) {
                                var comparator = last(arrays),
                                    mapped = arrayMap(arrays, castArrayLikeObject);

                                comparator = typeof comparator == 'function' ? comparator : undefined;
                                if (comparator) {
                                    mapped.pop();
                                }
                                return (mapped.length && mapped[0] === arrays[0]) ?
                                    baseIntersection(mapped, undefined, comparator) : [];
                            });

                            /**
                             * Converts all elements in `array` into a string separated by `separator`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to convert.
                             * @param {string} [separator=','] The element separator.
                             * @returns {string} Returns the joined string.
                             * @example
                             *
                             * _.join(['a', 'b', 'c'], '~');
                             * // => 'a~b~c'
                             */
                            function join(array, separator) {
                                return array == null ? '' : nativeJoin.call(array, separator);
                            }

                            /**
                             * Gets the last element of `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @returns {*} Returns the last element of `array`.
                             * @example
                             *
                             * _.last([1, 2, 3]);
                             * // => 3
                             */
                            function last(array) {
                                var length = array == null ? 0 : array.length;
                                return length ? array[length - 1] : undefined;
                            }

                            /**
                             * This method is like `_.indexOf` except that it iterates over elements of
                             * `array` from right to left.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {*} value The value to search for.
                             * @param {number} [fromIndex=array.length-1] The index to search from.
                             * @returns {number} Returns the index of the matched value, else `-1`.
                             * @example
                             *
                             * _.lastIndexOf([1, 2, 1, 2], 2);
                             * // => 3
                             *
                             * // Search from the `fromIndex`.
                             * _.lastIndexOf([1, 2, 1, 2], 2, 2);
                             * // => 1
                             */
                            function lastIndexOf(array, value, fromIndex) {
                                var length = array == null ? 0 : array.length;
                                if (!length) {
                                    return -1;
                                }
                                var index = length;
                                if (fromIndex !== undefined) {
                                    index = toInteger(fromIndex);
                                    index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
                                }
                                return value === value ?
                                    strictLastIndexOf(array, value, index) :
                                    baseFindIndex(array, baseIsNaN, index, true);
                            }

                            /**
                             * Gets the element at index `n` of `array`. If `n` is negative, the nth
                             * element from the end is returned.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.11.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @param {number} [n=0] The index of the element to return.
                             * @returns {*} Returns the nth element of `array`.
                             * @example
                             *
                             * var array = ['a', 'b', 'c', 'd'];
                             *
                             * _.nth(array, 1);
                             * // => 'b'
                             *
                             * _.nth(array, -2);
                             * // => 'c';
                             */
                            function nth(array, n) {
                                return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
                            }

                            /**
                             * Removes all given values from `array` using
                             * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
                             * for equality comparisons.
                             *
                             * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
                             * to remove elements from an array by predicate.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.0.0
                             * @category Array
                             * @param {Array} array The array to modify.
                             * @param {...*} [values] The values to remove.
                             * @returns {Array} Returns `array`.
                             * @example
                             *
                             * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
                             *
                             * _.pull(array, 'a', 'c');
                             * console.log(array);
                             * // => ['b', 'b']
                             */
                            var pull = baseRest(pullAll);

                            /**
                             * This method is like `_.pull` except that it accepts an array of values to remove.
                             *
                             * **Note:** Unlike `_.difference`, this method mutates `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to modify.
                             * @param {Array} values The values to remove.
                             * @returns {Array} Returns `array`.
                             * @example
                             *
                             * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
                             *
                             * _.pullAll(array, ['a', 'c']);
                             * console.log(array);
                             * // => ['b', 'b']
                             */
                            function pullAll(array, values) {
                                return (array && array.length && values && values.length) ?
                                    basePullAll(array, values) :
                                    array;
                            }

                            /**
                             * This method is like `_.pullAll` except that it accepts `iteratee` which is
                             * invoked for each element of `array` and `values` to generate the criterion
                             * by which they're compared. The iteratee is invoked with one argument: (value).
                             *
                             * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to modify.
                             * @param {Array} values The values to remove.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {Array} Returns `array`.
                             * @example
                             *
                             * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
                             *
                             * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
                             * console.log(array);
                             * // => [{ 'x': 2 }]
                             */
                            function pullAllBy(array, values, iteratee) {
                                return (array && array.length && values && values.length) ?
                                    basePullAll(array, values, getIteratee(iteratee, 2)) :
                                    array;
                            }

                            /**
                             * This method is like `_.pullAll` except that it accepts `comparator` which
                             * is invoked to compare elements of `array` to `values`. The comparator is
                             * invoked with two arguments: (arrVal, othVal).
                             *
                             * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.6.0
                             * @category Array
                             * @param {Array} array The array to modify.
                             * @param {Array} values The values to remove.
                             * @param {Function} [comparator] The comparator invoked per element.
                             * @returns {Array} Returns `array`.
                             * @example
                             *
                             * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
                             *
                             * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
                             * console.log(array);
                             * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
                             */
                            function pullAllWith(array, values, comparator) {
                                return (array && array.length && values && values.length) ?
                                    basePullAll(array, values, undefined, comparator) :
                                    array;
                            }

                            /**
                             * Removes elements from `array` corresponding to `indexes` and returns an
                             * array of removed elements.
                             *
                             * **Note:** Unlike `_.at`, this method mutates `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Array
                             * @param {Array} array The array to modify.
                             * @param {...(number|number[])} [indexes] The indexes of elements to remove.
                             * @returns {Array} Returns the new array of removed elements.
                             * @example
                             *
                             * var array = ['a', 'b', 'c', 'd'];
                             * var pulled = _.pullAt(array, [1, 3]);
                             *
                             * console.log(array);
                             * // => ['a', 'c']
                             *
                             * console.log(pulled);
                             * // => ['b', 'd']
                             */
                            var pullAt = flatRest(function(array, indexes) {
                                var length = array == null ? 0 : array.length,
                                    result = baseAt(array, indexes);

                                basePullAt(array, arrayMap(indexes, function(index) {
                                    return isIndex(index, length) ? +index : index;
                                }).sort(compareAscending));

                                return result;
                            });

                            /**
                             * Removes all elements from `array` that `predicate` returns truthy for
                             * and returns an array of the removed elements. The predicate is invoked
                             * with three arguments: (value, index, array).
                             *
                             * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
                             * to pull elements from an array by value.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.0.0
                             * @category Array
                             * @param {Array} array The array to modify.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the new array of removed elements.
                             * @example
                             *
                             * var array = [1, 2, 3, 4];
                             * var evens = _.remove(array, function(n) {
                             *   return n % 2 == 0;
                             * });
                             *
                             * console.log(array);
                             * // => [1, 3]
                             *
                             * console.log(evens);
                             * // => [2, 4]
                             */
                            function remove(array, predicate) {
                                var result = [];
                                if (!(array && array.length)) {
                                    return result;
                                }
                                var index = -1,
                                    indexes = [],
                                    length = array.length;

                                predicate = getIteratee(predicate, 3);
                                while (++index < length) {
                                    var value = array[index];
                                    if (predicate(value, index, array)) {
                                        result.push(value);
                                        indexes.push(index);
                                    }
                                }
                                basePullAt(array, indexes);
                                return result;
                            }

                            /**
                             * Reverses `array` so that the first element becomes the last, the second
                             * element becomes the second to last, and so on.
                             *
                             * **Note:** This method mutates `array` and is based on
                             * [`Array#reverse`](https://mdn.io/Array/reverse).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to modify.
                             * @returns {Array} Returns `array`.
                             * @example
                             *
                             * var array = [1, 2, 3];
                             *
                             * _.reverse(array);
                             * // => [3, 2, 1]
                             *
                             * console.log(array);
                             * // => [3, 2, 1]
                             */
                            function reverse(array) {
                                return array == null ? array : nativeReverse.call(array);
                            }

                            /**
                             * Creates a slice of `array` from `start` up to, but not including, `end`.
                             *
                             * **Note:** This method is used instead of
                             * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
                             * returned.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Array
                             * @param {Array} array The array to slice.
                             * @param {number} [start=0] The start position.
                             * @param {number} [end=array.length] The end position.
                             * @returns {Array} Returns the slice of `array`.
                             */
                            function slice(array, start, end) {
                                var length = array == null ? 0 : array.length;
                                if (!length) {
                                    return [];
                                }
                                if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
                                    start = 0;
                                    end = length;
                                } else {
                                    start = start == null ? 0 : toInteger(start);
                                    end = end === undefined ? length : toInteger(end);
                                }
                                return baseSlice(array, start, end);
                            }

                            /**
                             * Uses a binary search to determine the lowest index at which `value`
                             * should be inserted into `array` in order to maintain its sort order.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {Array} array The sorted array to inspect.
                             * @param {*} value The value to evaluate.
                             * @returns {number} Returns the index at which `value` should be inserted
                             *  into `array`.
                             * @example
                             *
                             * _.sortedIndex([30, 50], 40);
                             * // => 1
                             */
                            function sortedIndex(array, value) {
                                return baseSortedIndex(array, value);
                            }

                            /**
                             * This method is like `_.sortedIndex` except that it accepts `iteratee`
                             * which is invoked for `value` and each element of `array` to compute their
                             * sort ranking. The iteratee is invoked with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The sorted array to inspect.
                             * @param {*} value The value to evaluate.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {number} Returns the index at which `value` should be inserted
                             *  into `array`.
                             * @example
                             *
                             * var objects = [{ 'x': 4 }, { 'x': 5 }];
                             *
                             * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
                             * // => 0
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
                             * // => 0
                             */
                            function sortedIndexBy(array, value, iteratee) {
                                return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
                            }

                            /**
                             * This method is like `_.indexOf` except that it performs a binary
                             * search on a sorted `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {*} value The value to search for.
                             * @returns {number} Returns the index of the matched value, else `-1`.
                             * @example
                             *
                             * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
                             * // => 1
                             */
                            function sortedIndexOf(array, value) {
                                var length = array == null ? 0 : array.length;
                                if (length) {
                                    var index = baseSortedIndex(array, value);
                                    if (index < length && eq(array[index], value)) {
                                        return index;
                                    }
                                }
                                return -1;
                            }

                            /**
                             * This method is like `_.sortedIndex` except that it returns the highest
                             * index at which `value` should be inserted into `array` in order to
                             * maintain its sort order.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Array
                             * @param {Array} array The sorted array to inspect.
                             * @param {*} value The value to evaluate.
                             * @returns {number} Returns the index at which `value` should be inserted
                             *  into `array`.
                             * @example
                             *
                             * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
                             * // => 4
                             */
                            function sortedLastIndex(array, value) {
                                return baseSortedIndex(array, value, true);
                            }

                            /**
                             * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
                             * which is invoked for `value` and each element of `array` to compute their
                             * sort ranking. The iteratee is invoked with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The sorted array to inspect.
                             * @param {*} value The value to evaluate.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {number} Returns the index at which `value` should be inserted
                             *  into `array`.
                             * @example
                             *
                             * var objects = [{ 'x': 4 }, { 'x': 5 }];
                             *
                             * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
                             * // => 1
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
                             * // => 1
                             */
                            function sortedLastIndexBy(array, value, iteratee) {
                                return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
                            }

                            /**
                             * This method is like `_.lastIndexOf` except that it performs a binary
                             * search on a sorted `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {*} value The value to search for.
                             * @returns {number} Returns the index of the matched value, else `-1`.
                             * @example
                             *
                             * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
                             * // => 3
                             */
                            function sortedLastIndexOf(array, value) {
                                var length = array == null ? 0 : array.length;
                                if (length) {
                                    var index = baseSortedIndex(array, value, true) - 1;
                                    if (eq(array[index], value)) {
                                        return index;
                                    }
                                }
                                return -1;
                            }

                            /**
                             * This method is like `_.uniq` except that it's designed and optimized
                             * for sorted arrays.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @returns {Array} Returns the new duplicate free array.
                             * @example
                             *
                             * _.sortedUniq([1, 1, 2]);
                             * // => [1, 2]
                             */
                            function sortedUniq(array) {
                                return (array && array.length) ?
                                    baseSortedUniq(array) : [];
                            }

                            /**
                             * This method is like `_.uniqBy` except that it's designed and optimized
                             * for sorted arrays.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {Function} [iteratee] The iteratee invoked per element.
                             * @returns {Array} Returns the new duplicate free array.
                             * @example
                             *
                             * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
                             * // => [1.1, 2.3]
                             */
                            function sortedUniqBy(array, iteratee) {
                                return (array && array.length) ?
                                    baseSortedUniq(array, getIteratee(iteratee, 2)) : [];
                            }

                            /**
                             * Gets all but the first element of `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @returns {Array} Returns the slice of `array`.
                             * @example
                             *
                             * _.tail([1, 2, 3]);
                             * // => [2, 3]
                             */
                            function tail(array) {
                                var length = array == null ? 0 : array.length;
                                return length ? baseSlice(array, 1, length) : [];
                            }

                            /**
                             * Creates a slice of `array` with `n` elements taken from the beginning.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @param {number} [n=1] The number of elements to take.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {Array} Returns the slice of `array`.
                             * @example
                             *
                             * _.take([1, 2, 3]);
                             * // => [1]
                             *
                             * _.take([1, 2, 3], 2);
                             * // => [1, 2]
                             *
                             * _.take([1, 2, 3], 5);
                             * // => [1, 2, 3]
                             *
                             * _.take([1, 2, 3], 0);
                             * // => []
                             */
                            function take(array, n, guard) {
                                if (!(array && array.length)) {
                                    return [];
                                }
                                n = (guard || n === undefined) ? 1 : toInteger(n);
                                return baseSlice(array, 0, n < 0 ? 0 : n);
                            }

                            /**
                             * Creates a slice of `array` with `n` elements taken from the end.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @param {number} [n=1] The number of elements to take.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {Array} Returns the slice of `array`.
                             * @example
                             *
                             * _.takeRight([1, 2, 3]);
                             * // => [3]
                             *
                             * _.takeRight([1, 2, 3], 2);
                             * // => [2, 3]
                             *
                             * _.takeRight([1, 2, 3], 5);
                             * // => [1, 2, 3]
                             *
                             * _.takeRight([1, 2, 3], 0);
                             * // => []
                             */
                            function takeRight(array, n, guard) {
                                var length = array == null ? 0 : array.length;
                                if (!length) {
                                    return [];
                                }
                                n = (guard || n === undefined) ? 1 : toInteger(n);
                                n = length - n;
                                return baseSlice(array, n < 0 ? 0 : n, length);
                            }

                            /**
                             * Creates a slice of `array` with elements taken from the end. Elements are
                             * taken until `predicate` returns falsey. The predicate is invoked with
                             * three arguments: (value, index, array).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the slice of `array`.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney',  'active': true },
                             *   { 'user': 'fred',    'active': false },
                             *   { 'user': 'pebbles', 'active': false }
                             * ];
                             *
                             * _.takeRightWhile(users, function(o) { return !o.active; });
                             * // => objects for ['fred', 'pebbles']
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
                             * // => objects for ['pebbles']
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.takeRightWhile(users, ['active', false]);
                             * // => objects for ['fred', 'pebbles']
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.takeRightWhile(users, 'active');
                             * // => []
                             */
                            function takeRightWhile(array, predicate) {
                                return (array && array.length) ?
                                    baseWhile(array, getIteratee(predicate, 3), false, true) : [];
                            }

                            /**
                             * Creates a slice of `array` with elements taken from the beginning. Elements
                             * are taken until `predicate` returns falsey. The predicate is invoked with
                             * three arguments: (value, index, array).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Array
                             * @param {Array} array The array to query.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the slice of `array`.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney',  'active': false },
                             *   { 'user': 'fred',    'active': false },
                             *   { 'user': 'pebbles', 'active': true }
                             * ];
                             *
                             * _.takeWhile(users, function(o) { return !o.active; });
                             * // => objects for ['barney', 'fred']
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.takeWhile(users, { 'user': 'barney', 'active': false });
                             * // => objects for ['barney']
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.takeWhile(users, ['active', false]);
                             * // => objects for ['barney', 'fred']
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.takeWhile(users, 'active');
                             * // => []
                             */
                            function takeWhile(array, predicate) {
                                return (array && array.length) ?
                                    baseWhile(array, getIteratee(predicate, 3)) : [];
                            }

                            /**
                             * Creates an array of unique values, in order, from all given arrays using
                             * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
                             * for equality comparisons.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {...Array} [arrays] The arrays to inspect.
                             * @returns {Array} Returns the new array of combined values.
                             * @example
                             *
                             * _.union([2], [1, 2]);
                             * // => [2, 1]
                             */
                            var union = baseRest(function(arrays) {
                                return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
                            });

                            /**
                             * This method is like `_.union` except that it accepts `iteratee` which is
                             * invoked for each element of each `arrays` to generate the criterion by
                             * which uniqueness is computed. Result values are chosen from the first
                             * array in which the value occurs. The iteratee is invoked with one argument:
                             * (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {...Array} [arrays] The arrays to inspect.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {Array} Returns the new array of combined values.
                             * @example
                             *
                             * _.unionBy([2.1], [1.2, 2.3], Math.floor);
                             * // => [2.1, 1.2]
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
                             * // => [{ 'x': 1 }, { 'x': 2 }]
                             */
                            var unionBy = baseRest(function(arrays) {
                                var iteratee = last(arrays);
                                if (isArrayLikeObject(iteratee)) {
                                    iteratee = undefined;
                                }
                                return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
                            });

                            /**
                             * This method is like `_.union` except that it accepts `comparator` which
                             * is invoked to compare elements of `arrays`. Result values are chosen from
                             * the first array in which the value occurs. The comparator is invoked
                             * with two arguments: (arrVal, othVal).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {...Array} [arrays] The arrays to inspect.
                             * @param {Function} [comparator] The comparator invoked per element.
                             * @returns {Array} Returns the new array of combined values.
                             * @example
                             *
                             * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
                             * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
                             *
                             * _.unionWith(objects, others, _.isEqual);
                             * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
                             */
                            var unionWith = baseRest(function(arrays) {
                                var comparator = last(arrays);
                                comparator = typeof comparator == 'function' ? comparator : undefined;
                                return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
                            });

                            /**
                             * Creates a duplicate-free version of an array, using
                             * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
                             * for equality comparisons, in which only the first occurrence of each element
                             * is kept. The order of result values is determined by the order they occur
                             * in the array.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @returns {Array} Returns the new duplicate free array.
                             * @example
                             *
                             * _.uniq([2, 1, 2]);
                             * // => [2, 1]
                             */
                            function uniq(array) {
                                return (array && array.length) ? baseUniq(array) : [];
                            }

                            /**
                             * This method is like `_.uniq` except that it accepts `iteratee` which is
                             * invoked for each element in `array` to generate the criterion by which
                             * uniqueness is computed. The order of result values is determined by the
                             * order they occur in the array. The iteratee is invoked with one argument:
                             * (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {Array} Returns the new duplicate free array.
                             * @example
                             *
                             * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
                             * // => [2.1, 1.2]
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
                             * // => [{ 'x': 1 }, { 'x': 2 }]
                             */
                            function uniqBy(array, iteratee) {
                                return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];
                            }

                            /**
                             * This method is like `_.uniq` except that it accepts `comparator` which
                             * is invoked to compare elements of `array`. The order of result values is
                             * determined by the order they occur in the array.The comparator is invoked
                             * with two arguments: (arrVal, othVal).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {Function} [comparator] The comparator invoked per element.
                             * @returns {Array} Returns the new duplicate free array.
                             * @example
                             *
                             * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
                             *
                             * _.uniqWith(objects, _.isEqual);
                             * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
                             */
                            function uniqWith(array, comparator) {
                                comparator = typeof comparator == 'function' ? comparator : undefined;
                                return (array && array.length) ? baseUniq(array, undefined, comparator) : [];
                            }

                            /**
                             * This method is like `_.zip` except that it accepts an array of grouped
                             * elements and creates an array regrouping the elements to their pre-zip
                             * configuration.
                             *
                             * @static
                             * @memberOf _
                             * @since 1.2.0
                             * @category Array
                             * @param {Array} array The array of grouped elements to process.
                             * @returns {Array} Returns the new array of regrouped elements.
                             * @example
                             *
                             * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
                             * // => [['a', 1, true], ['b', 2, false]]
                             *
                             * _.unzip(zipped);
                             * // => [['a', 'b'], [1, 2], [true, false]]
                             */
                            function unzip(array) {
                                if (!(array && array.length)) {
                                    return [];
                                }
                                var length = 0;
                                array = arrayFilter(array, function(group) {
                                    if (isArrayLikeObject(group)) {
                                        length = nativeMax(group.length, length);
                                        return true;
                                    }
                                });
                                return baseTimes(length, function(index) {
                                    return arrayMap(array, baseProperty(index));
                                });
                            }

                            /**
                             * This method is like `_.unzip` except that it accepts `iteratee` to specify
                             * how regrouped values should be combined. The iteratee is invoked with the
                             * elements of each group: (...group).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.8.0
                             * @category Array
                             * @param {Array} array The array of grouped elements to process.
                             * @param {Function} [iteratee=_.identity] The function to combine
                             *  regrouped values.
                             * @returns {Array} Returns the new array of regrouped elements.
                             * @example
                             *
                             * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
                             * // => [[1, 10, 100], [2, 20, 200]]
                             *
                             * _.unzipWith(zipped, _.add);
                             * // => [3, 30, 300]
                             */
                            function unzipWith(array, iteratee) {
                                if (!(array && array.length)) {
                                    return [];
                                }
                                var result = unzip(array);
                                if (iteratee == null) {
                                    return result;
                                }
                                return arrayMap(result, function(group) {
                                    return apply(iteratee, undefined, group);
                                });
                            }

                            /**
                             * Creates an array excluding all given values using
                             * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
                             * for equality comparisons.
                             *
                             * **Note:** Unlike `_.pull`, this method returns a new array.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {Array} array The array to inspect.
                             * @param {...*} [values] The values to exclude.
                             * @returns {Array} Returns the new array of filtered values.
                             * @see _.difference, _.xor
                             * @example
                             *
                             * _.without([2, 1, 2, 3], 1, 2);
                             * // => [3]
                             */
                            var without = baseRest(function(array, values) {
                                return isArrayLikeObject(array) ?
                                    baseDifference(array, values) : [];
                            });

                            /**
                             * Creates an array of unique values that is the
                             * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
                             * of the given arrays. The order of result values is determined by the order
                             * they occur in the arrays.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.4.0
                             * @category Array
                             * @param {...Array} [arrays] The arrays to inspect.
                             * @returns {Array} Returns the new array of filtered values.
                             * @see _.difference, _.without
                             * @example
                             *
                             * _.xor([2, 1], [2, 3]);
                             * // => [1, 3]
                             */
                            var xor = baseRest(function(arrays) {
                                return baseXor(arrayFilter(arrays, isArrayLikeObject));
                            });

                            /**
                             * This method is like `_.xor` except that it accepts `iteratee` which is
                             * invoked for each element of each `arrays` to generate the criterion by
                             * which by which they're compared. The order of result values is determined
                             * by the order they occur in the arrays. The iteratee is invoked with one
                             * argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {...Array} [arrays] The arrays to inspect.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {Array} Returns the new array of filtered values.
                             * @example
                             *
                             * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
                             * // => [1.2, 3.4]
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
                             * // => [{ 'x': 2 }]
                             */
                            var xorBy = baseRest(function(arrays) {
                                var iteratee = last(arrays);
                                if (isArrayLikeObject(iteratee)) {
                                    iteratee = undefined;
                                }
                                return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
                            });

                            /**
                             * This method is like `_.xor` except that it accepts `comparator` which is
                             * invoked to compare elements of `arrays`. The order of result values is
                             * determined by the order they occur in the arrays. The comparator is invoked
                             * with two arguments: (arrVal, othVal).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Array
                             * @param {...Array} [arrays] The arrays to inspect.
                             * @param {Function} [comparator] The comparator invoked per element.
                             * @returns {Array} Returns the new array of filtered values.
                             * @example
                             *
                             * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
                             * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
                             *
                             * _.xorWith(objects, others, _.isEqual);
                             * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
                             */
                            var xorWith = baseRest(function(arrays) {
                                var comparator = last(arrays);
                                comparator = typeof comparator == 'function' ? comparator : undefined;
                                return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
                            });

                            /**
                             * Creates an array of grouped elements, the first of which contains the
                             * first elements of the given arrays, the second of which contains the
                             * second elements of the given arrays, and so on.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Array
                             * @param {...Array} [arrays] The arrays to process.
                             * @returns {Array} Returns the new array of grouped elements.
                             * @example
                             *
                             * _.zip(['a', 'b'], [1, 2], [true, false]);
                             * // => [['a', 1, true], ['b', 2, false]]
                             */
                            var zip = baseRest(unzip);

                            /**
                             * This method is like `_.fromPairs` except that it accepts two arrays,
                             * one of property identifiers and one of corresponding values.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.4.0
                             * @category Array
                             * @param {Array} [props=[]] The property identifiers.
                             * @param {Array} [values=[]] The property values.
                             * @returns {Object} Returns the new object.
                             * @example
                             *
                             * _.zipObject(['a', 'b'], [1, 2]);
                             * // => { 'a': 1, 'b': 2 }
                             */
                            function zipObject(props, values) {
                                return baseZipObject(props || [], values || [], assignValue);
                            }

                            /**
                             * This method is like `_.zipObject` except that it supports property paths.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.1.0
                             * @category Array
                             * @param {Array} [props=[]] The property identifiers.
                             * @param {Array} [values=[]] The property values.
                             * @returns {Object} Returns the new object.
                             * @example
                             *
                             * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
                             * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
                             */
                            function zipObjectDeep(props, values) {
                                return baseZipObject(props || [], values || [], baseSet);
                            }

                            /**
                             * This method is like `_.zip` except that it accepts `iteratee` to specify
                             * how grouped values should be combined. The iteratee is invoked with the
                             * elements of each group: (...group).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.8.0
                             * @category Array
                             * @param {...Array} [arrays] The arrays to process.
                             * @param {Function} [iteratee=_.identity] The function to combine
                             *  grouped values.
                             * @returns {Array} Returns the new array of grouped elements.
                             * @example
                             *
                             * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
                             *   return a + b + c;
                             * });
                             * // => [111, 222]
                             */
                            var zipWith = baseRest(function(arrays) {
                                var length = arrays.length,
                                    iteratee = length > 1 ? arrays[length - 1] : undefined;

                                iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
                                return unzipWith(arrays, iteratee);
                            });

                            /*------------------------------------------------------------------------*/

                            /**
                             * Creates a `lodash` wrapper instance that wraps `value` with explicit method
                             * chain sequences enabled. The result of such sequences must be unwrapped
                             * with `_#value`.
                             *
                             * @static
                             * @memberOf _
                             * @since 1.3.0
                             * @category Seq
                             * @param {*} value The value to wrap.
                             * @returns {Object} Returns the new `lodash` wrapper instance.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney',  'age': 36 },
                             *   { 'user': 'fred',    'age': 40 },
                             *   { 'user': 'pebbles', 'age': 1 }
                             * ];
                             *
                             * var youngest = _
                             *   .chain(users)
                             *   .sortBy('age')
                             *   .map(function(o) {
                             *     return o.user + ' is ' + o.age;
                             *   })
                             *   .head()
                             *   .value();
                             * // => 'pebbles is 1'
                             */
                            function chain(value) {
                                var result = lodash(value);
                                result.__chain__ = true;
                                return result;
                            }

                            /**
                             * This method invokes `interceptor` and returns `value`. The interceptor
                             * is invoked with one argument; (value). The purpose of this method is to
                             * "tap into" a method chain sequence in order to modify intermediate results.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Seq
                             * @param {*} value The value to provide to `interceptor`.
                             * @param {Function} interceptor The function to invoke.
                             * @returns {*} Returns `value`.
                             * @example
                             *
                             * _([1, 2, 3])
                             *  .tap(function(array) {
                             *    // Mutate input array.
                             *    array.pop();
                             *  })
                             *  .reverse()
                             *  .value();
                             * // => [2, 1]
                             */
                            function tap(value, interceptor) {
                                interceptor(value);
                                return value;
                            }

                            /**
                             * This method is like `_.tap` except that it returns the result of `interceptor`.
                             * The purpose of this method is to "pass thru" values replacing intermediate
                             * results in a method chain sequence.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Seq
                             * @param {*} value The value to provide to `interceptor`.
                             * @param {Function} interceptor The function to invoke.
                             * @returns {*} Returns the result of `interceptor`.
                             * @example
                             *
                             * _('  abc  ')
                             *  .chain()
                             *  .trim()
                             *  .thru(function(value) {
                             *    return [value];
                             *  })
                             *  .value();
                             * // => ['abc']
                             */
                            function thru(value, interceptor) {
                                return interceptor(value);
                            }

                            /**
                             * This method is the wrapper version of `_.at`.
                             *
                             * @name at
                             * @memberOf _
                             * @since 1.0.0
                             * @category Seq
                             * @param {...(string|string[])} [paths] The property paths to pick.
                             * @returns {Object} Returns the new `lodash` wrapper instance.
                             * @example
                             *
                             * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
                             *
                             * _(object).at(['a[0].b.c', 'a[1]']).value();
                             * // => [3, 4]
                             */
                            var wrapperAt = flatRest(function(paths) {
                                var length = paths.length,
                                    start = length ? paths[0] : 0,
                                    value = this.__wrapped__,
                                    interceptor = function(object) { return baseAt(object, paths); };

                                if (length > 1 || this.__actions__.length ||
                                    !(value instanceof LazyWrapper) || !isIndex(start)) {
                                    return this.thru(interceptor);
                                }
                                value = value.slice(start, +start + (length ? 1 : 0));
                                value.__actions__.push({
                                    'func': thru,
                                    'args': [interceptor],
                                    'thisArg': undefined
                                });
                                return new LodashWrapper(value, this.__chain__).thru(function(array) {
                                    if (length && !array.length) {
                                        array.push(undefined);
                                    }
                                    return array;
                                });
                            });

                            /**
                             * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
                             *
                             * @name chain
                             * @memberOf _
                             * @since 0.1.0
                             * @category Seq
                             * @returns {Object} Returns the new `lodash` wrapper instance.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney', 'age': 36 },
                             *   { 'user': 'fred',   'age': 40 }
                             * ];
                             *
                             * // A sequence without explicit chaining.
                             * _(users).head();
                             * // => { 'user': 'barney', 'age': 36 }
                             *
                             * // A sequence with explicit chaining.
                             * _(users)
                             *   .chain()
                             *   .head()
                             *   .pick('user')
                             *   .value();
                             * // => { 'user': 'barney' }
                             */
                            function wrapperChain() {
                                return chain(this);
                            }

                            /**
                             * Executes the chain sequence and returns the wrapped result.
                             *
                             * @name commit
                             * @memberOf _
                             * @since 3.2.0
                             * @category Seq
                             * @returns {Object} Returns the new `lodash` wrapper instance.
                             * @example
                             *
                             * var array = [1, 2];
                             * var wrapped = _(array).push(3);
                             *
                             * console.log(array);
                             * // => [1, 2]
                             *
                             * wrapped = wrapped.commit();
                             * console.log(array);
                             * // => [1, 2, 3]
                             *
                             * wrapped.last();
                             * // => 3
                             *
                             * console.log(array);
                             * // => [1, 2, 3]
                             */
                            function wrapperCommit() {
                                return new LodashWrapper(this.value(), this.__chain__);
                            }

                            /**
                             * Gets the next value on a wrapped object following the
                             * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
                             *
                             * @name next
                             * @memberOf _
                             * @since 4.0.0
                             * @category Seq
                             * @returns {Object} Returns the next iterator value.
                             * @example
                             *
                             * var wrapped = _([1, 2]);
                             *
                             * wrapped.next();
                             * // => { 'done': false, 'value': 1 }
                             *
                             * wrapped.next();
                             * // => { 'done': false, 'value': 2 }
                             *
                             * wrapped.next();
                             * // => { 'done': true, 'value': undefined }
                             */
                            function wrapperNext() {
                                if (this.__values__ === undefined) {
                                    this.__values__ = toArray(this.value());
                                }
                                var done = this.__index__ >= this.__values__.length,
                                    value = done ? undefined : this.__values__[this.__index__++];

                                return { 'done': done, 'value': value };
                            }

                            /**
                             * Enables the wrapper to be iterable.
                             *
                             * @name Symbol.iterator
                             * @memberOf _
                             * @since 4.0.0
                             * @category Seq
                             * @returns {Object} Returns the wrapper object.
                             * @example
                             *
                             * var wrapped = _([1, 2]);
                             *
                             * wrapped[Symbol.iterator]() === wrapped;
                             * // => true
                             *
                             * Array.from(wrapped);
                             * // => [1, 2]
                             */
                            function wrapperToIterator() {
                                return this;
                            }

                            /**
                             * Creates a clone of the chain sequence planting `value` as the wrapped value.
                             *
                             * @name plant
                             * @memberOf _
                             * @since 3.2.0
                             * @category Seq
                             * @param {*} value The value to plant.
                             * @returns {Object} Returns the new `lodash` wrapper instance.
                             * @example
                             *
                             * function square(n) {
                             *   return n * n;
                             * }
                             *
                             * var wrapped = _([1, 2]).map(square);
                             * var other = wrapped.plant([3, 4]);
                             *
                             * other.value();
                             * // => [9, 16]
                             *
                             * wrapped.value();
                             * // => [1, 4]
                             */
                            function wrapperPlant(value) {
                                var result,
                                    parent = this;

                                while (parent instanceof baseLodash) {
                                    var clone = wrapperClone(parent);
                                    clone.__index__ = 0;
                                    clone.__values__ = undefined;
                                    if (result) {
                                        previous.__wrapped__ = clone;
                                    } else {
                                        result = clone;
                                    }
                                    var previous = clone;
                                    parent = parent.__wrapped__;
                                }
                                previous.__wrapped__ = value;
                                return result;
                            }

                            /**
                             * This method is the wrapper version of `_.reverse`.
                             *
                             * **Note:** This method mutates the wrapped array.
                             *
                             * @name reverse
                             * @memberOf _
                             * @since 0.1.0
                             * @category Seq
                             * @returns {Object} Returns the new `lodash` wrapper instance.
                             * @example
                             *
                             * var array = [1, 2, 3];
                             *
                             * _(array).reverse().value()
                             * // => [3, 2, 1]
                             *
                             * console.log(array);
                             * // => [3, 2, 1]
                             */
                            function wrapperReverse() {
                                var value = this.__wrapped__;
                                if (value instanceof LazyWrapper) {
                                    var wrapped = value;
                                    if (this.__actions__.length) {
                                        wrapped = new LazyWrapper(this);
                                    }
                                    wrapped = wrapped.reverse();
                                    wrapped.__actions__.push({
                                        'func': thru,
                                        'args': [reverse],
                                        'thisArg': undefined
                                    });
                                    return new LodashWrapper(wrapped, this.__chain__);
                                }
                                return this.thru(reverse);
                            }

                            /**
                             * Executes the chain sequence to resolve the unwrapped value.
                             *
                             * @name value
                             * @memberOf _
                             * @since 0.1.0
                             * @alias toJSON, valueOf
                             * @category Seq
                             * @returns {*} Returns the resolved unwrapped value.
                             * @example
                             *
                             * _([1, 2, 3]).value();
                             * // => [1, 2, 3]
                             */
                            function wrapperValue() {
                                return baseWrapperValue(this.__wrapped__, this.__actions__);
                            }

                            /*------------------------------------------------------------------------*/

                            /**
                             * Creates an object composed of keys generated from the results of running
                             * each element of `collection` thru `iteratee`. The corresponding value of
                             * each key is the number of times the key was returned by `iteratee`. The
                             * iteratee is invoked with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 0.5.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
                             * @returns {Object} Returns the composed aggregate object.
                             * @example
                             *
                             * _.countBy([6.1, 4.2, 6.3], Math.floor);
                             * // => { '4': 1, '6': 2 }
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.countBy(['one', 'two', 'three'], 'length');
                             * // => { '3': 2, '5': 1 }
                             */
                            var countBy = createAggregator(function(result, value, key) {
                                if (hasOwnProperty.call(result, key)) {
                                    ++result[key];
                                } else {
                                    baseAssignValue(result, key, 1);
                                }
                            });

                            /**
                             * Checks if `predicate` returns truthy for **all** elements of `collection`.
                             * Iteration is stopped once `predicate` returns falsey. The predicate is
                             * invoked with three arguments: (value, index|key, collection).
                             *
                             * **Note:** This method returns `true` for
                             * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
                             * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
                             * elements of empty collections.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {boolean} Returns `true` if all elements pass the predicate check,
                             *  else `false`.
                             * @example
                             *
                             * _.every([true, 1, null, 'yes'], Boolean);
                             * // => false
                             *
                             * var users = [
                             *   { 'user': 'barney', 'age': 36, 'active': false },
                             *   { 'user': 'fred',   'age': 40, 'active': false }
                             * ];
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.every(users, { 'user': 'barney', 'active': false });
                             * // => false
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.every(users, ['active', false]);
                             * // => true
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.every(users, 'active');
                             * // => false
                             */
                            function every(collection, predicate, guard) {
                                var func = isArray(collection) ? arrayEvery : baseEvery;
                                if (guard && isIterateeCall(collection, predicate, guard)) {
                                    predicate = undefined;
                                }
                                return func(collection, getIteratee(predicate, 3));
                            }

                            /**
                             * Iterates over elements of `collection`, returning an array of all elements
                             * `predicate` returns truthy for. The predicate is invoked with three
                             * arguments: (value, index|key, collection).
                             *
                             * **Note:** Unlike `_.remove`, this method returns a new array.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the new filtered array.
                             * @see _.reject
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney', 'age': 36, 'active': true },
                             *   { 'user': 'fred',   'age': 40, 'active': false }
                             * ];
                             *
                             * _.filter(users, function(o) { return !o.active; });
                             * // => objects for ['fred']
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.filter(users, { 'age': 36, 'active': true });
                             * // => objects for ['barney']
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.filter(users, ['active', false]);
                             * // => objects for ['fred']
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.filter(users, 'active');
                             * // => objects for ['barney']
                             */
                            function filter(collection, predicate) {
                                var func = isArray(collection) ? arrayFilter : baseFilter;
                                return func(collection, getIteratee(predicate, 3));
                            }

                            /**
                             * Iterates over elements of `collection`, returning the first element
                             * `predicate` returns truthy for. The predicate is invoked with three
                             * arguments: (value, index|key, collection).
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to inspect.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @param {number} [fromIndex=0] The index to search from.
                             * @returns {*} Returns the matched element, else `undefined`.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney',  'age': 36, 'active': true },
                             *   { 'user': 'fred',    'age': 40, 'active': false },
                             *   { 'user': 'pebbles', 'age': 1,  'active': true }
                             * ];
                             *
                             * _.find(users, function(o) { return o.age < 40; });
                             * // => object for 'barney'
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.find(users, { 'age': 1, 'active': true });
                             * // => object for 'pebbles'
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.find(users, ['active', false]);
                             * // => object for 'fred'
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.find(users, 'active');
                             * // => object for 'barney'
                             */
                            var find = createFind(findIndex);

                            /**
                             * This method is like `_.find` except that it iterates over elements of
                             * `collection` from right to left.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.0.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to inspect.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @param {number} [fromIndex=collection.length-1] The index to search from.
                             * @returns {*} Returns the matched element, else `undefined`.
                             * @example
                             *
                             * _.findLast([1, 2, 3, 4], function(n) {
                             *   return n % 2 == 1;
                             * });
                             * // => 3
                             */
                            var findLast = createFind(findLastIndex);

                            /**
                             * Creates a flattened array of values by running each element in `collection`
                             * thru `iteratee` and flattening the mapped results. The iteratee is invoked
                             * with three arguments: (value, index|key, collection).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the new flattened array.
                             * @example
                             *
                             * function duplicate(n) {
                             *   return [n, n];
                             * }
                             *
                             * _.flatMap([1, 2], duplicate);
                             * // => [1, 1, 2, 2]
                             */
                            function flatMap(collection, iteratee) {
                                return baseFlatten(map(collection, iteratee), 1);
                            }

                            /**
                             * This method is like `_.flatMap` except that it recursively flattens the
                             * mapped results.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.7.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the new flattened array.
                             * @example
                             *
                             * function duplicate(n) {
                             *   return [[[n, n]]];
                             * }
                             *
                             * _.flatMapDeep([1, 2], duplicate);
                             * // => [1, 1, 2, 2]
                             */
                            function flatMapDeep(collection, iteratee) {
                                return baseFlatten(map(collection, iteratee), INFINITY);
                            }

                            /**
                             * This method is like `_.flatMap` except that it recursively flattens the
                             * mapped results up to `depth` times.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.7.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @param {number} [depth=1] The maximum recursion depth.
                             * @returns {Array} Returns the new flattened array.
                             * @example
                             *
                             * function duplicate(n) {
                             *   return [[[n, n]]];
                             * }
                             *
                             * _.flatMapDepth([1, 2], duplicate, 2);
                             * // => [[1, 1], [2, 2]]
                             */
                            function flatMapDepth(collection, iteratee, depth) {
                                depth = depth === undefined ? 1 : toInteger(depth);
                                return baseFlatten(map(collection, iteratee), depth);
                            }

                            /**
                             * Iterates over elements of `collection` and invokes `iteratee` for each element.
                             * The iteratee is invoked with three arguments: (value, index|key, collection).
                             * Iteratee functions may exit iteration early by explicitly returning `false`.
                             *
                             * **Note:** As with other "Collections" methods, objects with a "length"
                             * property are iterated like arrays. To avoid this behavior use `_.forIn`
                             * or `_.forOwn` for object iteration.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @alias each
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Array|Object} Returns `collection`.
                             * @see _.forEachRight
                             * @example
                             *
                             * _.forEach([1, 2], function(value) {
                             *   console.log(value);
                             * });
                             * // => Logs `1` then `2`.
                             *
                             * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
                             *   console.log(key);
                             * });
                             * // => Logs 'a' then 'b' (iteration order is not guaranteed).
                             */
                            function forEach(collection, iteratee) {
                                var func = isArray(collection) ? arrayEach : baseEach;
                                return func(collection, getIteratee(iteratee, 3));
                            }

                            /**
                             * This method is like `_.forEach` except that it iterates over elements of
                             * `collection` from right to left.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.0.0
                             * @alias eachRight
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Array|Object} Returns `collection`.
                             * @see _.forEach
                             * @example
                             *
                             * _.forEachRight([1, 2], function(value) {
                             *   console.log(value);
                             * });
                             * // => Logs `2` then `1`.
                             */
                            function forEachRight(collection, iteratee) {
                                var func = isArray(collection) ? arrayEachRight : baseEachRight;
                                return func(collection, getIteratee(iteratee, 3));
                            }

                            /**
                             * Creates an object composed of keys generated from the results of running
                             * each element of `collection` thru `iteratee`. The order of grouped values
                             * is determined by the order they occur in `collection`. The corresponding
                             * value of each key is an array of elements responsible for generating the
                             * key. The iteratee is invoked with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
                             * @returns {Object} Returns the composed aggregate object.
                             * @example
                             *
                             * _.groupBy([6.1, 4.2, 6.3], Math.floor);
                             * // => { '4': [4.2], '6': [6.1, 6.3] }
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.groupBy(['one', 'two', 'three'], 'length');
                             * // => { '3': ['one', 'two'], '5': ['three'] }
                             */
                            var groupBy = createAggregator(function(result, value, key) {
                                if (hasOwnProperty.call(result, key)) {
                                    result[key].push(value);
                                } else {
                                    baseAssignValue(result, key, [value]);
                                }
                            });

                            /**
                             * Checks if `value` is in `collection`. If `collection` is a string, it's
                             * checked for a substring of `value`, otherwise
                             * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
                             * is used for equality comparisons. If `fromIndex` is negative, it's used as
                             * the offset from the end of `collection`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object|string} collection The collection to inspect.
                             * @param {*} value The value to search for.
                             * @param {number} [fromIndex=0] The index to search from.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
                             * @returns {boolean} Returns `true` if `value` is found, else `false`.
                             * @example
                             *
                             * _.includes([1, 2, 3], 1);
                             * // => true
                             *
                             * _.includes([1, 2, 3], 1, 2);
                             * // => false
                             *
                             * _.includes({ 'a': 1, 'b': 2 }, 1);
                             * // => true
                             *
                             * _.includes('abcd', 'bc');
                             * // => true
                             */
                            function includes(collection, value, fromIndex, guard) {
                                collection = isArrayLike(collection) ? collection : values(collection);
                                fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;

                                var length = collection.length;
                                if (fromIndex < 0) {
                                    fromIndex = nativeMax(length + fromIndex, 0);
                                }
                                return isString(collection) ?
                                    (fromIndex <= length && collection.indexOf(value, fromIndex) > -1) :
                                    (!!length && baseIndexOf(collection, value, fromIndex) > -1);
                            }

                            /**
                             * Invokes the method at `path` of each element in `collection`, returning
                             * an array of the results of each invoked method. Any additional arguments
                             * are provided to each invoked method. If `path` is a function, it's invoked
                             * for, and `this` bound to, each element in `collection`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Array|Function|string} path The path of the method to invoke or
                             *  the function invoked per iteration.
                             * @param {...*} [args] The arguments to invoke each method with.
                             * @returns {Array} Returns the array of results.
                             * @example
                             *
                             * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
                             * // => [[1, 5, 7], [1, 2, 3]]
                             *
                             * _.invokeMap([123, 456], String.prototype.split, '');
                             * // => [['1', '2', '3'], ['4', '5', '6']]
                             */
                            var invokeMap = baseRest(function(collection, path, args) {
                                var index = -1,
                                    isFunc = typeof path == 'function',
                                    result = isArrayLike(collection) ? Array(collection.length) : [];

                                baseEach(collection, function(value) {
                                    result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
                                });
                                return result;
                            });

                            /**
                             * Creates an object composed of keys generated from the results of running
                             * each element of `collection` thru `iteratee`. The corresponding value of
                             * each key is the last element responsible for generating the key. The
                             * iteratee is invoked with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
                             * @returns {Object} Returns the composed aggregate object.
                             * @example
                             *
                             * var array = [
                             *   { 'dir': 'left', 'code': 97 },
                             *   { 'dir': 'right', 'code': 100 }
                             * ];
                             *
                             * _.keyBy(array, function(o) {
                             *   return String.fromCharCode(o.code);
                             * });
                             * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
                             *
                             * _.keyBy(array, 'dir');
                             * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
                             */
                            var keyBy = createAggregator(function(result, value, key) {
                                baseAssignValue(result, key, value);
                            });

                            /**
                             * Creates an array of values by running each element in `collection` thru
                             * `iteratee`. The iteratee is invoked with three arguments:
                             * (value, index|key, collection).
                             *
                             * Many lodash methods are guarded to work as iteratees for methods like
                             * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
                             *
                             * The guarded methods are:
                             * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
                             * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
                             * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
                             * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the new mapped array.
                             * @example
                             *
                             * function square(n) {
                             *   return n * n;
                             * }
                             *
                             * _.map([4, 8], square);
                             * // => [16, 64]
                             *
                             * _.map({ 'a': 4, 'b': 8 }, square);
                             * // => [16, 64] (iteration order is not guaranteed)
                             *
                             * var users = [
                             *   { 'user': 'barney' },
                             *   { 'user': 'fred' }
                             * ];
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.map(users, 'user');
                             * // => ['barney', 'fred']
                             */
                            function map(collection, iteratee) {
                                var func = isArray(collection) ? arrayMap : baseMap;
                                return func(collection, getIteratee(iteratee, 3));
                            }

                            /**
                             * This method is like `_.sortBy` except that it allows specifying the sort
                             * orders of the iteratees to sort by. If `orders` is unspecified, all values
                             * are sorted in ascending order. Otherwise, specify an order of "desc" for
                             * descending or "asc" for ascending sort order of corresponding values.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
                             *  The iteratees to sort by.
                             * @param {string[]} [orders] The sort orders of `iteratees`.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
                             * @returns {Array} Returns the new sorted array.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'fred',   'age': 48 },
                             *   { 'user': 'barney', 'age': 34 },
                             *   { 'user': 'fred',   'age': 40 },
                             *   { 'user': 'barney', 'age': 36 }
                             * ];
                             *
                             * // Sort by `user` in ascending order and by `age` in descending order.
                             * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
                             * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
                             */
                            function orderBy(collection, iteratees, orders, guard) {
                                if (collection == null) {
                                    return [];
                                }
                                if (!isArray(iteratees)) {
                                    iteratees = iteratees == null ? [] : [iteratees];
                                }
                                orders = guard ? undefined : orders;
                                if (!isArray(orders)) {
                                    orders = orders == null ? [] : [orders];
                                }
                                return baseOrderBy(collection, iteratees, orders);
                            }

                            /**
                             * Creates an array of elements split into two groups, the first of which
                             * contains elements `predicate` returns truthy for, the second of which
                             * contains elements `predicate` returns falsey for. The predicate is
                             * invoked with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the array of grouped elements.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney',  'age': 36, 'active': false },
                             *   { 'user': 'fred',    'age': 40, 'active': true },
                             *   { 'user': 'pebbles', 'age': 1,  'active': false }
                             * ];
                             *
                             * _.partition(users, function(o) { return o.active; });
                             * // => objects for [['fred'], ['barney', 'pebbles']]
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.partition(users, { 'age': 1, 'active': false });
                             * // => objects for [['pebbles'], ['barney', 'fred']]
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.partition(users, ['active', false]);
                             * // => objects for [['barney', 'pebbles'], ['fred']]
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.partition(users, 'active');
                             * // => objects for [['fred'], ['barney', 'pebbles']]
                             */
                            var partition = createAggregator(function(result, value, key) {
                                result[key ? 0 : 1].push(value);
                            }, function() {
                                return [
                                    [],
                                    []
                                ];
                            });

                            /**
                             * Reduces `collection` to a value which is the accumulated result of running
                             * each element in `collection` thru `iteratee`, where each successive
                             * invocation is supplied the return value of the previous. If `accumulator`
                             * is not given, the first element of `collection` is used as the initial
                             * value. The iteratee is invoked with four arguments:
                             * (accumulator, value, index|key, collection).
                             *
                             * Many lodash methods are guarded to work as iteratees for methods like
                             * `_.reduce`, `_.reduceRight`, and `_.transform`.
                             *
                             * The guarded methods are:
                             * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
                             * and `sortBy`
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @param {*} [accumulator] The initial value.
                             * @returns {*} Returns the accumulated value.
                             * @see _.reduceRight
                             * @example
                             *
                             * _.reduce([1, 2], function(sum, n) {
                             *   return sum + n;
                             * }, 0);
                             * // => 3
                             *
                             * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
                             *   (result[value] || (result[value] = [])).push(key);
                             *   return result;
                             * }, {});
                             * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
                             */
                            function reduce(collection, iteratee, accumulator) {
                                var func = isArray(collection) ? arrayReduce : baseReduce,
                                    initAccum = arguments.length < 3;

                                return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
                            }

                            /**
                             * This method is like `_.reduce` except that it iterates over elements of
                             * `collection` from right to left.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @param {*} [accumulator] The initial value.
                             * @returns {*} Returns the accumulated value.
                             * @see _.reduce
                             * @example
                             *
                             * var array = [[0, 1], [2, 3], [4, 5]];
                             *
                             * _.reduceRight(array, function(flattened, other) {
                             *   return flattened.concat(other);
                             * }, []);
                             * // => [4, 5, 2, 3, 0, 1]
                             */
                            function reduceRight(collection, iteratee, accumulator) {
                                var func = isArray(collection) ? arrayReduceRight : baseReduce,
                                    initAccum = arguments.length < 3;

                                return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
                            }

                            /**
                             * The opposite of `_.filter`; this method returns the elements of `collection`
                             * that `predicate` does **not** return truthy for.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the new filtered array.
                             * @see _.filter
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney', 'age': 36, 'active': false },
                             *   { 'user': 'fred',   'age': 40, 'active': true }
                             * ];
                             *
                             * _.reject(users, function(o) { return !o.active; });
                             * // => objects for ['fred']
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.reject(users, { 'age': 40, 'active': true });
                             * // => objects for ['barney']
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.reject(users, ['active', false]);
                             * // => objects for ['fred']
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.reject(users, 'active');
                             * // => objects for ['barney']
                             */
                            function reject(collection, predicate) {
                                var func = isArray(collection) ? arrayFilter : baseFilter;
                                return func(collection, negate(getIteratee(predicate, 3)));
                            }

                            /**
                             * Gets a random element from `collection`.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.0.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to sample.
                             * @returns {*} Returns the random element.
                             * @example
                             *
                             * _.sample([1, 2, 3, 4]);
                             * // => 2
                             */
                            function sample(collection) {
                                var func = isArray(collection) ? arraySample : baseSample;
                                return func(collection);
                            }

                            /**
                             * Gets `n` random elements at unique keys from `collection` up to the
                             * size of `collection`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to sample.
                             * @param {number} [n=1] The number of elements to sample.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {Array} Returns the random elements.
                             * @example
                             *
                             * _.sampleSize([1, 2, 3], 2);
                             * // => [3, 1]
                             *
                             * _.sampleSize([1, 2, 3], 4);
                             * // => [2, 3, 1]
                             */
                            function sampleSize(collection, n, guard) {
                                if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
                                    n = 1;
                                } else {
                                    n = toInteger(n);
                                }
                                var func = isArray(collection) ? arraySampleSize : baseSampleSize;
                                return func(collection, n);
                            }

                            /**
                             * Creates an array of shuffled values, using a version of the
                             * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to shuffle.
                             * @returns {Array} Returns the new shuffled array.
                             * @example
                             *
                             * _.shuffle([1, 2, 3, 4]);
                             * // => [4, 1, 3, 2]
                             */
                            function shuffle(collection) {
                                var func = isArray(collection) ? arrayShuffle : baseShuffle;
                                return func(collection);
                            }

                            /**
                             * Gets the size of `collection` by returning its length for array-like
                             * values or the number of own enumerable string keyed properties for objects.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object|string} collection The collection to inspect.
                             * @returns {number} Returns the collection size.
                             * @example
                             *
                             * _.size([1, 2, 3]);
                             * // => 3
                             *
                             * _.size({ 'a': 1, 'b': 2 });
                             * // => 2
                             *
                             * _.size('pebbles');
                             * // => 7
                             */
                            function size(collection) {
                                if (collection == null) {
                                    return 0;
                                }
                                if (isArrayLike(collection)) {
                                    return isString(collection) ? stringSize(collection) : collection.length;
                                }
                                var tag = getTag(collection);
                                if (tag == mapTag || tag == setTag) {
                                    return collection.size;
                                }
                                return baseKeys(collection).length;
                            }

                            /**
                             * Checks if `predicate` returns truthy for **any** element of `collection`.
                             * Iteration is stopped once `predicate` returns truthy. The predicate is
                             * invoked with three arguments: (value, index|key, collection).
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {boolean} Returns `true` if any element passes the predicate check,
                             *  else `false`.
                             * @example
                             *
                             * _.some([null, 0, 'yes', false], Boolean);
                             * // => true
                             *
                             * var users = [
                             *   { 'user': 'barney', 'active': true },
                             *   { 'user': 'fred',   'active': false }
                             * ];
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.some(users, { 'user': 'barney', 'active': false });
                             * // => false
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.some(users, ['active', false]);
                             * // => true
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.some(users, 'active');
                             * // => true
                             */
                            function some(collection, predicate, guard) {
                                var func = isArray(collection) ? arraySome : baseSome;
                                if (guard && isIterateeCall(collection, predicate, guard)) {
                                    predicate = undefined;
                                }
                                return func(collection, getIteratee(predicate, 3));
                            }

                            /**
                             * Creates an array of elements, sorted in ascending order by the results of
                             * running each element in a collection thru each iteratee. This method
                             * performs a stable sort, that is, it preserves the original sort order of
                             * equal elements. The iteratees are invoked with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Collection
                             * @param {Array|Object} collection The collection to iterate over.
                             * @param {...(Function|Function[])} [iteratees=[_.identity]]
                             *  The iteratees to sort by.
                             * @returns {Array} Returns the new sorted array.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'fred',   'age': 48 },
                             *   { 'user': 'barney', 'age': 36 },
                             *   { 'user': 'fred',   'age': 40 },
                             *   { 'user': 'barney', 'age': 34 }
                             * ];
                             *
                             * _.sortBy(users, [function(o) { return o.user; }]);
                             * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
                             *
                             * _.sortBy(users, ['user', 'age']);
                             * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
                             */
                            var sortBy = baseRest(function(collection, iteratees) {
                                if (collection == null) {
                                    return [];
                                }
                                var length = iteratees.length;
                                if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
                                    iteratees = [];
                                } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
                                    iteratees = [iteratees[0]];
                                }
                                return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
                            });

                            /*------------------------------------------------------------------------*/

                            /**
                             * Gets the timestamp of the number of milliseconds that have elapsed since
                             * the Unix epoch (1 January 1970 00:00:00 UTC).
                             *
                             * @static
                             * @memberOf _
                             * @since 2.4.0
                             * @category Date
                             * @returns {number} Returns the timestamp.
                             * @example
                             *
                             * _.defer(function(stamp) {
                             *   console.log(_.now() - stamp);
                             * }, _.now());
                             * // => Logs the number of milliseconds it took for the deferred invocation.
                             */
                            var now = ctxNow || function() {
                                return root.Date.now();
                            };

                            /*------------------------------------------------------------------------*/

                            /**
                             * The opposite of `_.before`; this method creates a function that invokes
                             * `func` once it's called `n` or more times.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Function
                             * @param {number} n The number of calls before `func` is invoked.
                             * @param {Function} func The function to restrict.
                             * @returns {Function} Returns the new restricted function.
                             * @example
                             *
                             * var saves = ['profile', 'settings'];
                             *
                             * var done = _.after(saves.length, function() {
                             *   console.log('done saving!');
                             * });
                             *
                             * _.forEach(saves, function(type) {
                             *   asyncSave({ 'type': type, 'complete': done });
                             * });
                             * // => Logs 'done saving!' after the two async saves have completed.
                             */
                            function after(n, func) {
                                if (typeof func != 'function') {
                                    throw new TypeError(FUNC_ERROR_TEXT);
                                }
                                n = toInteger(n);
                                return function() {
                                    if (--n < 1) {
                                        return func.apply(this, arguments);
                                    }
                                };
                            }

                            /**
                             * Creates a function that invokes `func`, with up to `n` arguments,
                             * ignoring any additional arguments.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Function
                             * @param {Function} func The function to cap arguments for.
                             * @param {number} [n=func.length] The arity cap.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {Function} Returns the new capped function.
                             * @example
                             *
                             * _.map(['6', '8', '10'], _.ary(parseInt, 1));
                             * // => [6, 8, 10]
                             */
                            function ary(func, n, guard) {
                                n = guard ? undefined : n;
                                n = (func && n == null) ? func.length : n;
                                return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
                            }

                            /**
                             * Creates a function that invokes `func`, with the `this` binding and arguments
                             * of the created function, while it's called less than `n` times. Subsequent
                             * calls to the created function return the result of the last `func` invocation.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Function
                             * @param {number} n The number of calls at which `func` is no longer invoked.
                             * @param {Function} func The function to restrict.
                             * @returns {Function} Returns the new restricted function.
                             * @example
                             *
                             * jQuery(element).on('click', _.before(5, addContactToList));
                             * // => Allows adding up to 4 contacts to the list.
                             */
                            function before(n, func) {
                                var result;
                                if (typeof func != 'function') {
                                    throw new TypeError(FUNC_ERROR_TEXT);
                                }
                                n = toInteger(n);
                                return function() {
                                    if (--n > 0) {
                                        result = func.apply(this, arguments);
                                    }
                                    if (n <= 1) {
                                        func = undefined;
                                    }
                                    return result;
                                };
                            }

                            /**
                             * Creates a function that invokes `func` with the `this` binding of `thisArg`
                             * and `partials` prepended to the arguments it receives.
                             *
                             * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
                             * may be used as a placeholder for partially applied arguments.
                             *
                             * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
                             * property of bound functions.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Function
                             * @param {Function} func The function to bind.
                             * @param {*} thisArg The `this` binding of `func`.
                             * @param {...*} [partials] The arguments to be partially applied.
                             * @returns {Function} Returns the new bound function.
                             * @example
                             *
                             * function greet(greeting, punctuation) {
                             *   return greeting + ' ' + this.user + punctuation;
                             * }
                             *
                             * var object = { 'user': 'fred' };
                             *
                             * var bound = _.bind(greet, object, 'hi');
                             * bound('!');
                             * // => 'hi fred!'
                             *
                             * // Bound with placeholders.
                             * var bound = _.bind(greet, object, _, '!');
                             * bound('hi');
                             * // => 'hi fred!'
                             */
                            var bind = baseRest(function(func, thisArg, partials) {
                                var bitmask = WRAP_BIND_FLAG;
                                if (partials.length) {
                                    var holders = replaceHolders(partials, getHolder(bind));
                                    bitmask |= WRAP_PARTIAL_FLAG;
                                }
                                return createWrap(func, bitmask, thisArg, partials, holders);
                            });

                            /**
                             * Creates a function that invokes the method at `object[key]` with `partials`
                             * prepended to the arguments it receives.
                             *
                             * This method differs from `_.bind` by allowing bound functions to reference
                             * methods that may be redefined or don't yet exist. See
                             * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
                             * for more details.
                             *
                             * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
                             * builds, may be used as a placeholder for partially applied arguments.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.10.0
                             * @category Function
                             * @param {Object} object The object to invoke the method on.
                             * @param {string} key The key of the method.
                             * @param {...*} [partials] The arguments to be partially applied.
                             * @returns {Function} Returns the new bound function.
                             * @example
                             *
                             * var object = {
                             *   'user': 'fred',
                             *   'greet': function(greeting, punctuation) {
                             *     return greeting + ' ' + this.user + punctuation;
                             *   }
                             * };
                             *
                             * var bound = _.bindKey(object, 'greet', 'hi');
                             * bound('!');
                             * // => 'hi fred!'
                             *
                             * object.greet = function(greeting, punctuation) {
                             *   return greeting + 'ya ' + this.user + punctuation;
                             * };
                             *
                             * bound('!');
                             * // => 'hiya fred!'
                             *
                             * // Bound with placeholders.
                             * var bound = _.bindKey(object, 'greet', _, '!');
                             * bound('hi');
                             * // => 'hiya fred!'
                             */
                            var bindKey = baseRest(function(object, key, partials) {
                                var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
                                if (partials.length) {
                                    var holders = replaceHolders(partials, getHolder(bindKey));
                                    bitmask |= WRAP_PARTIAL_FLAG;
                                }
                                return createWrap(key, bitmask, object, partials, holders);
                            });

                            /**
                             * Creates a function that accepts arguments of `func` and either invokes
                             * `func` returning its result, if at least `arity` number of arguments have
                             * been provided, or returns a function that accepts the remaining `func`
                             * arguments, and so on. The arity of `func` may be specified if `func.length`
                             * is not sufficient.
                             *
                             * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
                             * may be used as a placeholder for provided arguments.
                             *
                             * **Note:** This method doesn't set the "length" property of curried functions.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.0.0
                             * @category Function
                             * @param {Function} func The function to curry.
                             * @param {number} [arity=func.length] The arity of `func`.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {Function} Returns the new curried function.
                             * @example
                             *
                             * var abc = function(a, b, c) {
                             *   return [a, b, c];
                             * };
                             *
                             * var curried = _.curry(abc);
                             *
                             * curried(1)(2)(3);
                             * // => [1, 2, 3]
                             *
                             * curried(1, 2)(3);
                             * // => [1, 2, 3]
                             *
                             * curried(1, 2, 3);
                             * // => [1, 2, 3]
                             *
                             * // Curried with placeholders.
                             * curried(1)(_, 3)(2);
                             * // => [1, 2, 3]
                             */
                            function curry(func, arity, guard) {
                                arity = guard ? undefined : arity;
                                var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
                                result.placeholder = curry.placeholder;
                                return result;
                            }

                            /**
                             * This method is like `_.curry` except that arguments are applied to `func`
                             * in the manner of `_.partialRight` instead of `_.partial`.
                             *
                             * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
                             * builds, may be used as a placeholder for provided arguments.
                             *
                             * **Note:** This method doesn't set the "length" property of curried functions.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Function
                             * @param {Function} func The function to curry.
                             * @param {number} [arity=func.length] The arity of `func`.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {Function} Returns the new curried function.
                             * @example
                             *
                             * var abc = function(a, b, c) {
                             *   return [a, b, c];
                             * };
                             *
                             * var curried = _.curryRight(abc);
                             *
                             * curried(3)(2)(1);
                             * // => [1, 2, 3]
                             *
                             * curried(2, 3)(1);
                             * // => [1, 2, 3]
                             *
                             * curried(1, 2, 3);
                             * // => [1, 2, 3]
                             *
                             * // Curried with placeholders.
                             * curried(3)(1, _)(2);
                             * // => [1, 2, 3]
                             */
                            function curryRight(func, arity, guard) {
                                arity = guard ? undefined : arity;
                                var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
                                result.placeholder = curryRight.placeholder;
                                return result;
                            }

                            /**
                             * Creates a debounced function that delays invoking `func` until after `wait`
                             * milliseconds have elapsed since the last time the debounced function was
                             * invoked. The debounced function comes with a `cancel` method to cancel
                             * delayed `func` invocations and a `flush` method to immediately invoke them.
                             * Provide `options` to indicate whether `func` should be invoked on the
                             * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
                             * with the last arguments provided to the debounced function. Subsequent
                             * calls to the debounced function return the result of the last `func`
                             * invocation.
                             *
                             * **Note:** If `leading` and `trailing` options are `true`, `func` is
                             * invoked on the trailing edge of the timeout only if the debounced function
                             * is invoked more than once during the `wait` timeout.
                             *
                             * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
                             * until to the next tick, similar to `setTimeout` with a timeout of `0`.
                             *
                             * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
                             * for details over the differences between `_.debounce` and `_.throttle`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Function
                             * @param {Function} func The function to debounce.
                             * @param {number} [wait=0] The number of milliseconds to delay.
                             * @param {Object} [options={}] The options object.
                             * @param {boolean} [options.leading=false]
                             *  Specify invoking on the leading edge of the timeout.
                             * @param {number} [options.maxWait]
                             *  The maximum time `func` is allowed to be delayed before it's invoked.
                             * @param {boolean} [options.trailing=true]
                             *  Specify invoking on the trailing edge of the timeout.
                             * @returns {Function} Returns the new debounced function.
                             * @example
                             *
                             * // Avoid costly calculations while the window size is in flux.
                             * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
                             *
                             * // Invoke `sendMail` when clicked, debouncing subsequent calls.
                             * jQuery(element).on('click', _.debounce(sendMail, 300, {
                             *   'leading': true,
                             *   'trailing': false
                             * }));
                             *
                             * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
                             * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
                             * var source = new EventSource('/stream');
                             * jQuery(source).on('message', debounced);
                             *
                             * // Cancel the trailing debounced invocation.
                             * jQuery(window).on('popstate', debounced.cancel);
                             */
                            function debounce(func, wait, options) {
                                var lastArgs,
                                    lastThis,
                                    maxWait,
                                    result,
                                    timerId,
                                    lastCallTime,
                                    lastInvokeTime = 0,
                                    leading = false,
                                    maxing = false,
                                    trailing = true;

                                if (typeof func != 'function') {
                                    throw new TypeError(FUNC_ERROR_TEXT);
                                }
                                wait = toNumber(wait) || 0;
                                if (isObject(options)) {
                                    leading = !!options.leading;
                                    maxing = 'maxWait' in options;
                                    maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
                                    trailing = 'trailing' in options ? !!options.trailing : trailing;
                                }

                                function invokeFunc(time) {
                                    var args = lastArgs,
                                        thisArg = lastThis;

                                    lastArgs = lastThis = undefined;
                                    lastInvokeTime = time;
                                    result = func.apply(thisArg, args);
                                    return result;
                                }

                                function leadingEdge(time) {
                                    // Reset any `maxWait` timer.
                                    lastInvokeTime = time;
                                    // Start the timer for the trailing edge.
                                    timerId = setTimeout(timerExpired, wait);
                                    // Invoke the leading edge.
                                    return leading ? invokeFunc(time) : result;
                                }

                                function remainingWait(time) {
                                    var timeSinceLastCall = time - lastCallTime,
                                        timeSinceLastInvoke = time - lastInvokeTime,
                                        result = wait - timeSinceLastCall;

                                    return maxing ? nativeMin(result, maxWait - timeSinceLastInvoke) : result;
                                }

                                function shouldInvoke(time) {
                                    var timeSinceLastCall = time - lastCallTime,
                                        timeSinceLastInvoke = time - lastInvokeTime;

                                    // Either this is the first call, activity has stopped and we're at the
                                    // trailing edge, the system time has gone backwards and we're treating
                                    // it as the trailing edge, or we've hit the `maxWait` limit.
                                    return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
                                        (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
                                }

                                function timerExpired() {
                                    var time = now();
                                    if (shouldInvoke(time)) {
                                        return trailingEdge(time);
                                    }
                                    // Restart the timer.
                                    timerId = setTimeout(timerExpired, remainingWait(time));
                                }

                                function trailingEdge(time) {
                                    timerId = undefined;

                                    // Only invoke if we have `lastArgs` which means `func` has been
                                    // debounced at least once.
                                    if (trailing && lastArgs) {
                                        return invokeFunc(time);
                                    }
                                    lastArgs = lastThis = undefined;
                                    return result;
                                }

                                function cancel() {
                                    if (timerId !== undefined) {
                                        clearTimeout(timerId);
                                    }
                                    lastInvokeTime = 0;
                                    lastArgs = lastCallTime = lastThis = timerId = undefined;
                                }

                                function flush() {
                                    return timerId === undefined ? result : trailingEdge(now());
                                }

                                function debounced() {
                                    var time = now(),
                                        isInvoking = shouldInvoke(time);

                                    lastArgs = arguments;
                                    lastThis = this;
                                    lastCallTime = time;

                                    if (isInvoking) {
                                        if (timerId === undefined) {
                                            return leadingEdge(lastCallTime);
                                        }
                                        if (maxing) {
                                            // Handle invocations in a tight loop.
                                            timerId = setTimeout(timerExpired, wait);
                                            return invokeFunc(lastCallTime);
                                        }
                                    }
                                    if (timerId === undefined) {
                                        timerId = setTimeout(timerExpired, wait);
                                    }
                                    return result;
                                }
                                debounced.cancel = cancel;
                                debounced.flush = flush;
                                return debounced;
                            }

                            /**
                             * Defers invoking the `func` until the current call stack has cleared. Any
                             * additional arguments are provided to `func` when it's invoked.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Function
                             * @param {Function} func The function to defer.
                             * @param {...*} [args] The arguments to invoke `func` with.
                             * @returns {number} Returns the timer id.
                             * @example
                             *
                             * _.defer(function(text) {
                             *   console.log(text);
                             * }, 'deferred');
                             * // => Logs 'deferred' after one millisecond.
                             */
                            var defer = baseRest(function(func, args) {
                                return baseDelay(func, 1, args);
                            });

                            /**
                             * Invokes `func` after `wait` milliseconds. Any additional arguments are
                             * provided to `func` when it's invoked.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Function
                             * @param {Function} func The function to delay.
                             * @param {number} wait The number of milliseconds to delay invocation.
                             * @param {...*} [args] The arguments to invoke `func` with.
                             * @returns {number} Returns the timer id.
                             * @example
                             *
                             * _.delay(function(text) {
                             *   console.log(text);
                             * }, 1000, 'later');
                             * // => Logs 'later' after one second.
                             */
                            var delay = baseRest(function(func, wait, args) {
                                return baseDelay(func, toNumber(wait) || 0, args);
                            });

                            /**
                             * Creates a function that invokes `func` with arguments reversed.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Function
                             * @param {Function} func The function to flip arguments for.
                             * @returns {Function} Returns the new flipped function.
                             * @example
                             *
                             * var flipped = _.flip(function() {
                             *   return _.toArray(arguments);
                             * });
                             *
                             * flipped('a', 'b', 'c', 'd');
                             * // => ['d', 'c', 'b', 'a']
                             */
                            function flip(func) {
                                return createWrap(func, WRAP_FLIP_FLAG);
                            }

                            /**
                             * Creates a function that memoizes the result of `func`. If `resolver` is
                             * provided, it determines the cache key for storing the result based on the
                             * arguments provided to the memoized function. By default, the first argument
                             * provided to the memoized function is used as the map cache key. The `func`
                             * is invoked with the `this` binding of the memoized function.
                             *
                             * **Note:** The cache is exposed as the `cache` property on the memoized
                             * function. Its creation may be customized by replacing the `_.memoize.Cache`
                             * constructor with one whose instances implement the
                             * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
                             * method interface of `clear`, `delete`, `get`, `has`, and `set`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Function
                             * @param {Function} func The function to have its output memoized.
                             * @param {Function} [resolver] The function to resolve the cache key.
                             * @returns {Function} Returns the new memoized function.
                             * @example
                             *
                             * var object = { 'a': 1, 'b': 2 };
                             * var other = { 'c': 3, 'd': 4 };
                             *
                             * var values = _.memoize(_.values);
                             * values(object);
                             * // => [1, 2]
                             *
                             * values(other);
                             * // => [3, 4]
                             *
                             * object.a = 2;
                             * values(object);
                             * // => [1, 2]
                             *
                             * // Modify the result cache.
                             * values.cache.set(object, ['a', 'b']);
                             * values(object);
                             * // => ['a', 'b']
                             *
                             * // Replace `_.memoize.Cache`.
                             * _.memoize.Cache = WeakMap;
                             */
                            function memoize(func, resolver) {
                                if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
                                    throw new TypeError(FUNC_ERROR_TEXT);
                                }
                                var memoized = function() {
                                    var args = arguments,
                                        key = resolver ? resolver.apply(this, args) : args[0],
                                        cache = memoized.cache;

                                    if (cache.has(key)) {
                                        return cache.get(key);
                                    }
                                    var result = func.apply(this, args);
                                    memoized.cache = cache.set(key, result) || cache;
                                    return result;
                                };
                                memoized.cache = new(memoize.Cache || MapCache);
                                return memoized;
                            }

                            // Expose `MapCache`.
                            memoize.Cache = MapCache;

                            /**
                             * Creates a function that negates the result of the predicate `func`. The
                             * `func` predicate is invoked with the `this` binding and arguments of the
                             * created function.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Function
                             * @param {Function} predicate The predicate to negate.
                             * @returns {Function} Returns the new negated function.
                             * @example
                             *
                             * function isEven(n) {
                             *   return n % 2 == 0;
                             * }
                             *
                             * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
                             * // => [1, 3, 5]
                             */
                            function negate(predicate) {
                                if (typeof predicate != 'function') {
                                    throw new TypeError(FUNC_ERROR_TEXT);
                                }
                                return function() {
                                    var args = arguments;
                                    switch (args.length) {
                                        case 0:
                                            return !predicate.call(this);
                                        case 1:
                                            return !predicate.call(this, args[0]);
                                        case 2:
                                            return !predicate.call(this, args[0], args[1]);
                                        case 3:
                                            return !predicate.call(this, args[0], args[1], args[2]);
                                    }
                                    return !predicate.apply(this, args);
                                };
                            }

                            /**
                             * Creates a function that is restricted to invoking `func` once. Repeat calls
                             * to the function return the value of the first invocation. The `func` is
                             * invoked with the `this` binding and arguments of the created function.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Function
                             * @param {Function} func The function to restrict.
                             * @returns {Function} Returns the new restricted function.
                             * @example
                             *
                             * var initialize = _.once(createApplication);
                             * initialize();
                             * initialize();
                             * // => `createApplication` is invoked once
                             */
                            function once(func) {
                                return before(2, func);
                            }

                            /**
                             * Creates a function that invokes `func` with its arguments transformed.
                             *
                             * @static
                             * @since 4.0.0
                             * @memberOf _
                             * @category Function
                             * @param {Function} func The function to wrap.
                             * @param {...(Function|Function[])} [transforms=[_.identity]]
                             *  The argument transforms.
                             * @returns {Function} Returns the new function.
                             * @example
                             *
                             * function doubled(n) {
                             *   return n * 2;
                             * }
                             *
                             * function square(n) {
                             *   return n * n;
                             * }
                             *
                             * var func = _.overArgs(function(x, y) {
                             *   return [x, y];
                             * }, [square, doubled]);
                             *
                             * func(9, 3);
                             * // => [81, 6]
                             *
                             * func(10, 5);
                             * // => [100, 10]
                             */
                            var overArgs = castRest(function(func, transforms) {
                                transforms = (transforms.length == 1 && isArray(transforms[0])) ?
                                    arrayMap(transforms[0], baseUnary(getIteratee())) :
                                    arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));

                                var funcsLength = transforms.length;
                                return baseRest(function(args) {
                                    var index = -1,
                                        length = nativeMin(args.length, funcsLength);

                                    while (++index < length) {
                                        args[index] = transforms[index].call(this, args[index]);
                                    }
                                    return apply(func, this, args);
                                });
                            });

                            /**
                             * Creates a function that invokes `func` with `partials` prepended to the
                             * arguments it receives. This method is like `_.bind` except it does **not**
                             * alter the `this` binding.
                             *
                             * The `_.partial.placeholder` value, which defaults to `_` in monolithic
                             * builds, may be used as a placeholder for partially applied arguments.
                             *
                             * **Note:** This method doesn't set the "length" property of partially
                             * applied functions.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.2.0
                             * @category Function
                             * @param {Function} func The function to partially apply arguments to.
                             * @param {...*} [partials] The arguments to be partially applied.
                             * @returns {Function} Returns the new partially applied function.
                             * @example
                             *
                             * function greet(greeting, name) {
                             *   return greeting + ' ' + name;
                             * }
                             *
                             * var sayHelloTo = _.partial(greet, 'hello');
                             * sayHelloTo('fred');
                             * // => 'hello fred'
                             *
                             * // Partially applied with placeholders.
                             * var greetFred = _.partial(greet, _, 'fred');
                             * greetFred('hi');
                             * // => 'hi fred'
                             */
                            var partial = baseRest(function(func, partials) {
                                var holders = replaceHolders(partials, getHolder(partial));
                                return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);
                            });

                            /**
                             * This method is like `_.partial` except that partially applied arguments
                             * are appended to the arguments it receives.
                             *
                             * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
                             * builds, may be used as a placeholder for partially applied arguments.
                             *
                             * **Note:** This method doesn't set the "length" property of partially
                             * applied functions.
                             *
                             * @static
                             * @memberOf _
                             * @since 1.0.0
                             * @category Function
                             * @param {Function} func The function to partially apply arguments to.
                             * @param {...*} [partials] The arguments to be partially applied.
                             * @returns {Function} Returns the new partially applied function.
                             * @example
                             *
                             * function greet(greeting, name) {
                             *   return greeting + ' ' + name;
                             * }
                             *
                             * var greetFred = _.partialRight(greet, 'fred');
                             * greetFred('hi');
                             * // => 'hi fred'
                             *
                             * // Partially applied with placeholders.
                             * var sayHelloTo = _.partialRight(greet, 'hello', _);
                             * sayHelloTo('fred');
                             * // => 'hello fred'
                             */
                            var partialRight = baseRest(function(func, partials) {
                                var holders = replaceHolders(partials, getHolder(partialRight));
                                return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);
                            });

                            /**
                             * Creates a function that invokes `func` with arguments arranged according
                             * to the specified `indexes` where the argument value at the first index is
                             * provided as the first argument, the argument value at the second index is
                             * provided as the second argument, and so on.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Function
                             * @param {Function} func The function to rearrange arguments for.
                             * @param {...(number|number[])} indexes The arranged argument indexes.
                             * @returns {Function} Returns the new function.
                             * @example
                             *
                             * var rearged = _.rearg(function(a, b, c) {
                             *   return [a, b, c];
                             * }, [2, 0, 1]);
                             *
                             * rearged('b', 'c', 'a')
                             * // => ['a', 'b', 'c']
                             */
                            var rearg = flatRest(function(func, indexes) {
                                return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);
                            });

                            /**
                             * Creates a function that invokes `func` with the `this` binding of the
                             * created function and arguments from `start` and beyond provided as
                             * an array.
                             *
                             * **Note:** This method is based on the
                             * [rest parameter](https://mdn.io/rest_parameters).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Function
                             * @param {Function} func The function to apply a rest parameter to.
                             * @param {number} [start=func.length-1] The start position of the rest parameter.
                             * @returns {Function} Returns the new function.
                             * @example
                             *
                             * var say = _.rest(function(what, names) {
                             *   return what + ' ' + _.initial(names).join(', ') +
                             *     (_.size(names) > 1 ? ', & ' : '') + _.last(names);
                             * });
                             *
                             * say('hello', 'fred', 'barney', 'pebbles');
                             * // => 'hello fred, barney, & pebbles'
                             */
                            function rest(func, start) {
                                if (typeof func != 'function') {
                                    throw new TypeError(FUNC_ERROR_TEXT);
                                }
                                start = start === undefined ? start : toInteger(start);
                                return baseRest(func, start);
                            }

                            /**
                             * Creates a function that invokes `func` with the `this` binding of the
                             * create function and an array of arguments much like
                             * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
                             *
                             * **Note:** This method is based on the
                             * [spread operator](https://mdn.io/spread_operator).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.2.0
                             * @category Function
                             * @param {Function} func The function to spread arguments over.
                             * @param {number} [start=0] The start position of the spread.
                             * @returns {Function} Returns the new function.
                             * @example
                             *
                             * var say = _.spread(function(who, what) {
                             *   return who + ' says ' + what;
                             * });
                             *
                             * say(['fred', 'hello']);
                             * // => 'fred says hello'
                             *
                             * var numbers = Promise.all([
                             *   Promise.resolve(40),
                             *   Promise.resolve(36)
                             * ]);
                             *
                             * numbers.then(_.spread(function(x, y) {
                             *   return x + y;
                             * }));
                             * // => a Promise of 76
                             */
                            function spread(func, start) {
                                if (typeof func != 'function') {
                                    throw new TypeError(FUNC_ERROR_TEXT);
                                }
                                start = start == null ? 0 : nativeMax(toInteger(start), 0);
                                return baseRest(function(args) {
                                    var array = args[start],
                                        otherArgs = castSlice(args, 0, start);

                                    if (array) {
                                        arrayPush(otherArgs, array);
                                    }
                                    return apply(func, this, otherArgs);
                                });
                            }

                            /**
                             * Creates a throttled function that only invokes `func` at most once per
                             * every `wait` milliseconds. The throttled function comes with a `cancel`
                             * method to cancel delayed `func` invocations and a `flush` method to
                             * immediately invoke them. Provide `options` to indicate whether `func`
                             * should be invoked on the leading and/or trailing edge of the `wait`
                             * timeout. The `func` is invoked with the last arguments provided to the
                             * throttled function. Subsequent calls to the throttled function return the
                             * result of the last `func` invocation.
                             *
                             * **Note:** If `leading` and `trailing` options are `true`, `func` is
                             * invoked on the trailing edge of the timeout only if the throttled function
                             * is invoked more than once during the `wait` timeout.
                             *
                             * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
                             * until to the next tick, similar to `setTimeout` with a timeout of `0`.
                             *
                             * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
                             * for details over the differences between `_.throttle` and `_.debounce`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Function
                             * @param {Function} func The function to throttle.
                             * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
                             * @param {Object} [options={}] The options object.
                             * @param {boolean} [options.leading=true]
                             *  Specify invoking on the leading edge of the timeout.
                             * @param {boolean} [options.trailing=true]
                             *  Specify invoking on the trailing edge of the timeout.
                             * @returns {Function} Returns the new throttled function.
                             * @example
                             *
                             * // Avoid excessively updating the position while scrolling.
                             * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
                             *
                             * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
                             * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
                             * jQuery(element).on('click', throttled);
                             *
                             * // Cancel the trailing throttled invocation.
                             * jQuery(window).on('popstate', throttled.cancel);
                             */
                            function throttle(func, wait, options) {
                                var leading = true,
                                    trailing = true;

                                if (typeof func != 'function') {
                                    throw new TypeError(FUNC_ERROR_TEXT);
                                }
                                if (isObject(options)) {
                                    leading = 'leading' in options ? !!options.leading : leading;
                                    trailing = 'trailing' in options ? !!options.trailing : trailing;
                                }
                                return debounce(func, wait, {
                                    'leading': leading,
                                    'maxWait': wait,
                                    'trailing': trailing
                                });
                            }

                            /**
                             * Creates a function that accepts up to one argument, ignoring any
                             * additional arguments.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Function
                             * @param {Function} func The function to cap arguments for.
                             * @returns {Function} Returns the new capped function.
                             * @example
                             *
                             * _.map(['6', '8', '10'], _.unary(parseInt));
                             * // => [6, 8, 10]
                             */
                            function unary(func) {
                                return ary(func, 1);
                            }

                            /**
                             * Creates a function that provides `value` to `wrapper` as its first
                             * argument. Any additional arguments provided to the function are appended
                             * to those provided to the `wrapper`. The wrapper is invoked with the `this`
                             * binding of the created function.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Function
                             * @param {*} value The value to wrap.
                             * @param {Function} [wrapper=identity] The wrapper function.
                             * @returns {Function} Returns the new function.
                             * @example
                             *
                             * var p = _.wrap(_.escape, function(func, text) {
                             *   return '<p>' + func(text) + '</p>';
                             * });
                             *
                             * p('fred, barney, & pebbles');
                             * // => '<p>fred, barney, &amp; pebbles</p>'
                             */
                            function wrap(value, wrapper) {
                                return partial(castFunction(wrapper), value);
                            }

                            /*------------------------------------------------------------------------*/

                            /**
                             * Casts `value` as an array if it's not one.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.4.0
                             * @category Lang
                             * @param {*} value The value to inspect.
                             * @returns {Array} Returns the cast array.
                             * @example
                             *
                             * _.castArray(1);
                             * // => [1]
                             *
                             * _.castArray({ 'a': 1 });
                             * // => [{ 'a': 1 }]
                             *
                             * _.castArray('abc');
                             * // => ['abc']
                             *
                             * _.castArray(null);
                             * // => [null]
                             *
                             * _.castArray(undefined);
                             * // => [undefined]
                             *
                             * _.castArray();
                             * // => []
                             *
                             * var array = [1, 2, 3];
                             * console.log(_.castArray(array) === array);
                             * // => true
                             */
                            function castArray() {
                                if (!arguments.length) {
                                    return [];
                                }
                                var value = arguments[0];
                                return isArray(value) ? value : [value];
                            }

                            /**
                             * Creates a shallow clone of `value`.
                             *
                             * **Note:** This method is loosely based on the
                             * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
                             * and supports cloning arrays, array buffers, booleans, date objects, maps,
                             * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
                             * arrays. The own enumerable properties of `arguments` objects are cloned
                             * as plain objects. An empty object is returned for uncloneable values such
                             * as error objects, functions, DOM nodes, and WeakMaps.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to clone.
                             * @returns {*} Returns the cloned value.
                             * @see _.cloneDeep
                             * @example
                             *
                             * var objects = [{ 'a': 1 }, { 'b': 2 }];
                             *
                             * var shallow = _.clone(objects);
                             * console.log(shallow[0] === objects[0]);
                             * // => true
                             */
                            function clone(value) {
                                return baseClone(value, CLONE_SYMBOLS_FLAG);
                            }

                            /**
                             * This method is like `_.clone` except that it accepts `customizer` which
                             * is invoked to produce the cloned value. If `customizer` returns `undefined`,
                             * cloning is handled by the method instead. The `customizer` is invoked with
                             * up to four arguments; (value [, index|key, object, stack]).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to clone.
                             * @param {Function} [customizer] The function to customize cloning.
                             * @returns {*} Returns the cloned value.
                             * @see _.cloneDeepWith
                             * @example
                             *
                             * function customizer(value) {
                             *   if (_.isElement(value)) {
                             *     return value.cloneNode(false);
                             *   }
                             * }
                             *
                             * var el = _.cloneWith(document.body, customizer);
                             *
                             * console.log(el === document.body);
                             * // => false
                             * console.log(el.nodeName);
                             * // => 'BODY'
                             * console.log(el.childNodes.length);
                             * // => 0
                             */
                            function cloneWith(value, customizer) {
                                customizer = typeof customizer == 'function' ? customizer : undefined;
                                return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
                            }

                            /**
                             * This method is like `_.clone` except that it recursively clones `value`.
                             *
                             * @static
                             * @memberOf _
                             * @since 1.0.0
                             * @category Lang
                             * @param {*} value The value to recursively clone.
                             * @returns {*} Returns the deep cloned value.
                             * @see _.clone
                             * @example
                             *
                             * var objects = [{ 'a': 1 }, { 'b': 2 }];
                             *
                             * var deep = _.cloneDeep(objects);
                             * console.log(deep[0] === objects[0]);
                             * // => false
                             */
                            function cloneDeep(value) {
                                return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
                            }

                            /**
                             * This method is like `_.cloneWith` except that it recursively clones `value`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to recursively clone.
                             * @param {Function} [customizer] The function to customize cloning.
                             * @returns {*} Returns the deep cloned value.
                             * @see _.cloneWith
                             * @example
                             *
                             * function customizer(value) {
                             *   if (_.isElement(value)) {
                             *     return value.cloneNode(true);
                             *   }
                             * }
                             *
                             * var el = _.cloneDeepWith(document.body, customizer);
                             *
                             * console.log(el === document.body);
                             * // => false
                             * console.log(el.nodeName);
                             * // => 'BODY'
                             * console.log(el.childNodes.length);
                             * // => 20
                             */
                            function cloneDeepWith(value, customizer) {
                                customizer = typeof customizer == 'function' ? customizer : undefined;
                                return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
                            }

                            /**
                             * Checks if `object` conforms to `source` by invoking the predicate
                             * properties of `source` with the corresponding property values of `object`.
                             *
                             * **Note:** This method is equivalent to `_.conforms` when `source` is
                             * partially applied.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.14.0
                             * @category Lang
                             * @param {Object} object The object to inspect.
                             * @param {Object} source The object of property predicates to conform to.
                             * @returns {boolean} Returns `true` if `object` conforms, else `false`.
                             * @example
                             *
                             * var object = { 'a': 1, 'b': 2 };
                             *
                             * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
                             * // => true
                             *
                             * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
                             * // => false
                             */
                            function conformsTo(object, source) {
                                return source == null || baseConformsTo(object, source, keys(source));
                            }

                            /**
                             * Performs a
                             * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
                             * comparison between two values to determine if they are equivalent.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to compare.
                             * @param {*} other The other value to compare.
                             * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
                             * @example
                             *
                             * var object = { 'a': 1 };
                             * var other = { 'a': 1 };
                             *
                             * _.eq(object, object);
                             * // => true
                             *
                             * _.eq(object, other);
                             * // => false
                             *
                             * _.eq('a', 'a');
                             * // => true
                             *
                             * _.eq('a', Object('a'));
                             * // => false
                             *
                             * _.eq(NaN, NaN);
                             * // => true
                             */
                            function eq(value, other) {
                                return value === other || (value !== value && other !== other);
                            }

                            /**
                             * Checks if `value` is greater than `other`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.9.0
                             * @category Lang
                             * @param {*} value The value to compare.
                             * @param {*} other The other value to compare.
                             * @returns {boolean} Returns `true` if `value` is greater than `other`,
                             *  else `false`.
                             * @see _.lt
                             * @example
                             *
                             * _.gt(3, 1);
                             * // => true
                             *
                             * _.gt(3, 3);
                             * // => false
                             *
                             * _.gt(1, 3);
                             * // => false
                             */
                            var gt = createRelationalOperation(baseGt);

                            /**
                             * Checks if `value` is greater than or equal to `other`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.9.0
                             * @category Lang
                             * @param {*} value The value to compare.
                             * @param {*} other The other value to compare.
                             * @returns {boolean} Returns `true` if `value` is greater than or equal to
                             *  `other`, else `false`.
                             * @see _.lte
                             * @example
                             *
                             * _.gte(3, 1);
                             * // => true
                             *
                             * _.gte(3, 3);
                             * // => true
                             *
                             * _.gte(1, 3);
                             * // => false
                             */
                            var gte = createRelationalOperation(function(value, other) {
                                return value >= other;
                            });

                            /**
                             * Checks if `value` is likely an `arguments` object.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is an `arguments` object,
                             *  else `false`.
                             * @example
                             *
                             * _.isArguments(function() { return arguments; }());
                             * // => true
                             *
                             * _.isArguments([1, 2, 3]);
                             * // => false
                             */
                            var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
                                return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
                                    !propertyIsEnumerable.call(value, 'callee');
                            };

                            /**
                             * Checks if `value` is classified as an `Array` object.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is an array, else `false`.
                             * @example
                             *
                             * _.isArray([1, 2, 3]);
                             * // => true
                             *
                             * _.isArray(document.body.children);
                             * // => false
                             *
                             * _.isArray('abc');
                             * // => false
                             *
                             * _.isArray(_.noop);
                             * // => false
                             */
                            var isArray = Array.isArray;

                            /**
                             * Checks if `value` is classified as an `ArrayBuffer` object.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.3.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
                             * @example
                             *
                             * _.isArrayBuffer(new ArrayBuffer(2));
                             * // => true
                             *
                             * _.isArrayBuffer(new Array(2));
                             * // => false
                             */
                            var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;

                            /**
                             * Checks if `value` is array-like. A value is considered array-like if it's
                             * not a function and has a `value.length` that's an integer greater than or
                             * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
                             * @example
                             *
                             * _.isArrayLike([1, 2, 3]);
                             * // => true
                             *
                             * _.isArrayLike(document.body.children);
                             * // => true
                             *
                             * _.isArrayLike('abc');
                             * // => true
                             *
                             * _.isArrayLike(_.noop);
                             * // => false
                             */
                            function isArrayLike(value) {
                                return value != null && isLength(value.length) && !isFunction(value);
                            }

                            /**
                             * This method is like `_.isArrayLike` except that it also checks if `value`
                             * is an object.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is an array-like object,
                             *  else `false`.
                             * @example
                             *
                             * _.isArrayLikeObject([1, 2, 3]);
                             * // => true
                             *
                             * _.isArrayLikeObject(document.body.children);
                             * // => true
                             *
                             * _.isArrayLikeObject('abc');
                             * // => false
                             *
                             * _.isArrayLikeObject(_.noop);
                             * // => false
                             */
                            function isArrayLikeObject(value) {
                                return isObjectLike(value) && isArrayLike(value);
                            }

                            /**
                             * Checks if `value` is classified as a boolean primitive or object.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
                             * @example
                             *
                             * _.isBoolean(false);
                             * // => true
                             *
                             * _.isBoolean(null);
                             * // => false
                             */
                            function isBoolean(value) {
                                return value === true || value === false ||
                                    (isObjectLike(value) && baseGetTag(value) == boolTag);
                            }

                            /**
                             * Checks if `value` is a buffer.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.3.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
                             * @example
                             *
                             * _.isBuffer(new Buffer(2));
                             * // => true
                             *
                             * _.isBuffer(new Uint8Array(2));
                             * // => false
                             */
                            var isBuffer = nativeIsBuffer || stubFalse;

                            /**
                             * Checks if `value` is classified as a `Date` object.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
                             * @example
                             *
                             * _.isDate(new Date);
                             * // => true
                             *
                             * _.isDate('Mon April 23 2012');
                             * // => false
                             */
                            var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;

                            /**
                             * Checks if `value` is likely a DOM element.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
                             * @example
                             *
                             * _.isElement(document.body);
                             * // => true
                             *
                             * _.isElement('<body>');
                             * // => false
                             */
                            function isElement(value) {
                                return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
                            }

                            /**
                             * Checks if `value` is an empty object, collection, map, or set.
                             *
                             * Objects are considered empty if they have no own enumerable string keyed
                             * properties.
                             *
                             * Array-like values such as `arguments` objects, arrays, buffers, strings, or
                             * jQuery-like collections are considered empty if they have a `length` of `0`.
                             * Similarly, maps and sets are considered empty if they have a `size` of `0`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is empty, else `false`.
                             * @example
                             *
                             * _.isEmpty(null);
                             * // => true
                             *
                             * _.isEmpty(true);
                             * // => true
                             *
                             * _.isEmpty(1);
                             * // => true
                             *
                             * _.isEmpty([1, 2, 3]);
                             * // => false
                             *
                             * _.isEmpty({ 'a': 1 });
                             * // => false
                             */
                            function isEmpty(value) {
                                if (value == null) {
                                    return true;
                                }
                                if (isArrayLike(value) &&
                                    (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
                                        isBuffer(value) || isTypedArray(value) || isArguments(value))) {
                                    return !value.length;
                                }
                                var tag = getTag(value);
                                if (tag == mapTag || tag == setTag) {
                                    return !value.size;
                                }
                                if (isPrototype(value)) {
                                    return !baseKeys(value).length;
                                }
                                for (var key in value) {
                                    if (hasOwnProperty.call(value, key)) {
                                        return false;
                                    }
                                }
                                return true;
                            }

                            /**
                             * Performs a deep comparison between two values to determine if they are
                             * equivalent.
                             *
                             * **Note:** This method supports comparing arrays, array buffers, booleans,
                             * date objects, error objects, maps, numbers, `Object` objects, regexes,
                             * sets, strings, symbols, and typed arrays. `Object` objects are compared
                             * by their own, not inherited, enumerable properties. Functions and DOM
                             * nodes are compared by strict equality, i.e. `===`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to compare.
                             * @param {*} other The other value to compare.
                             * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
                             * @example
                             *
                             * var object = { 'a': 1 };
                             * var other = { 'a': 1 };
                             *
                             * _.isEqual(object, other);
                             * // => true
                             *
                             * object === other;
                             * // => false
                             */
                            function isEqual(value, other) {
                                return baseIsEqual(value, other);
                            }

                            /**
                             * This method is like `_.isEqual` except that it accepts `customizer` which
                             * is invoked to compare values. If `customizer` returns `undefined`, comparisons
                             * are handled by the method instead. The `customizer` is invoked with up to
                             * six arguments: (objValue, othValue [, index|key, object, other, stack]).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to compare.
                             * @param {*} other The other value to compare.
                             * @param {Function} [customizer] The function to customize comparisons.
                             * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
                             * @example
                             *
                             * function isGreeting(value) {
                             *   return /^h(?:i|ello)$/.test(value);
                             * }
                             *
                             * function customizer(objValue, othValue) {
                             *   if (isGreeting(objValue) && isGreeting(othValue)) {
                             *     return true;
                             *   }
                             * }
                             *
                             * var array = ['hello', 'goodbye'];
                             * var other = ['hi', 'goodbye'];
                             *
                             * _.isEqualWith(array, other, customizer);
                             * // => true
                             */
                            function isEqualWith(value, other, customizer) {
                                customizer = typeof customizer == 'function' ? customizer : undefined;
                                var result = customizer ? customizer(value, other) : undefined;
                                return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;
                            }

                            /**
                             * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
                             * `SyntaxError`, `TypeError`, or `URIError` object.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
                             * @example
                             *
                             * _.isError(new Error);
                             * // => true
                             *
                             * _.isError(Error);
                             * // => false
                             */
                            function isError(value) {
                                if (!isObjectLike(value)) {
                                    return false;
                                }
                                var tag = baseGetTag(value);
                                return tag == errorTag || tag == domExcTag ||
                                    (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
                            }

                            /**
                             * Checks if `value` is a finite primitive number.
                             *
                             * **Note:** This method is based on
                             * [`Number.isFinite`](https://mdn.io/Number/isFinite).
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
                             * @example
                             *
                             * _.isFinite(3);
                             * // => true
                             *
                             * _.isFinite(Number.MIN_VALUE);
                             * // => true
                             *
                             * _.isFinite(Infinity);
                             * // => false
                             *
                             * _.isFinite('3');
                             * // => false
                             */
                            function isFinite(value) {
                                return typeof value == 'number' && nativeIsFinite(value);
                            }

                            /**
                             * Checks if `value` is classified as a `Function` object.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a function, else `false`.
                             * @example
                             *
                             * _.isFunction(_);
                             * // => true
                             *
                             * _.isFunction(/abc/);
                             * // => false
                             */
                            function isFunction(value) {
                                if (!isObject(value)) {
                                    return false;
                                }
                                // The use of `Object#toString` avoids issues with the `typeof` operator
                                // in Safari 9 which returns 'object' for typed arrays and other constructors.
                                var tag = baseGetTag(value);
                                return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
                            }

                            /**
                             * Checks if `value` is an integer.
                             *
                             * **Note:** This method is based on
                             * [`Number.isInteger`](https://mdn.io/Number/isInteger).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
                             * @example
                             *
                             * _.isInteger(3);
                             * // => true
                             *
                             * _.isInteger(Number.MIN_VALUE);
                             * // => false
                             *
                             * _.isInteger(Infinity);
                             * // => false
                             *
                             * _.isInteger('3');
                             * // => false
                             */
                            function isInteger(value) {
                                return typeof value == 'number' && value == toInteger(value);
                            }

                            /**
                             * Checks if `value` is a valid array-like length.
                             *
                             * **Note:** This method is loosely based on
                             * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
                             * @example
                             *
                             * _.isLength(3);
                             * // => true
                             *
                             * _.isLength(Number.MIN_VALUE);
                             * // => false
                             *
                             * _.isLength(Infinity);
                             * // => false
                             *
                             * _.isLength('3');
                             * // => false
                             */
                            function isLength(value) {
                                return typeof value == 'number' &&
                                    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
                            }

                            /**
                             * Checks if `value` is the
                             * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
                             * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is an object, else `false`.
                             * @example
                             *
                             * _.isObject({});
                             * // => true
                             *
                             * _.isObject([1, 2, 3]);
                             * // => true
                             *
                             * _.isObject(_.noop);
                             * // => true
                             *
                             * _.isObject(null);
                             * // => false
                             */
                            function isObject(value) {
                                var type = typeof value;
                                return value != null && (type == 'object' || type == 'function');
                            }

                            /**
                             * Checks if `value` is object-like. A value is object-like if it's not `null`
                             * and has a `typeof` result of "object".
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
                             * @example
                             *
                             * _.isObjectLike({});
                             * // => true
                             *
                             * _.isObjectLike([1, 2, 3]);
                             * // => true
                             *
                             * _.isObjectLike(_.noop);
                             * // => false
                             *
                             * _.isObjectLike(null);
                             * // => false
                             */
                            function isObjectLike(value) {
                                return value != null && typeof value == 'object';
                            }

                            /**
                             * Checks if `value` is classified as a `Map` object.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.3.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a map, else `false`.
                             * @example
                             *
                             * _.isMap(new Map);
                             * // => true
                             *
                             * _.isMap(new WeakMap);
                             * // => false
                             */
                            var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;

                            /**
                             * Performs a partial deep comparison between `object` and `source` to
                             * determine if `object` contains equivalent property values.
                             *
                             * **Note:** This method is equivalent to `_.matches` when `source` is
                             * partially applied.
                             *
                             * Partial comparisons will match empty array and empty object `source`
                             * values against any array or object value, respectively. See `_.isEqual`
                             * for a list of supported value comparisons.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Lang
                             * @param {Object} object The object to inspect.
                             * @param {Object} source The object of property values to match.
                             * @returns {boolean} Returns `true` if `object` is a match, else `false`.
                             * @example
                             *
                             * var object = { 'a': 1, 'b': 2 };
                             *
                             * _.isMatch(object, { 'b': 2 });
                             * // => true
                             *
                             * _.isMatch(object, { 'b': 1 });
                             * // => false
                             */
                            function isMatch(object, source) {
                                return object === source || baseIsMatch(object, source, getMatchData(source));
                            }

                            /**
                             * This method is like `_.isMatch` except that it accepts `customizer` which
                             * is invoked to compare values. If `customizer` returns `undefined`, comparisons
                             * are handled by the method instead. The `customizer` is invoked with five
                             * arguments: (objValue, srcValue, index|key, object, source).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {Object} object The object to inspect.
                             * @param {Object} source The object of property values to match.
                             * @param {Function} [customizer] The function to customize comparisons.
                             * @returns {boolean} Returns `true` if `object` is a match, else `false`.
                             * @example
                             *
                             * function isGreeting(value) {
                             *   return /^h(?:i|ello)$/.test(value);
                             * }
                             *
                             * function customizer(objValue, srcValue) {
                             *   if (isGreeting(objValue) && isGreeting(srcValue)) {
                             *     return true;
                             *   }
                             * }
                             *
                             * var object = { 'greeting': 'hello' };
                             * var source = { 'greeting': 'hi' };
                             *
                             * _.isMatchWith(object, source, customizer);
                             * // => true
                             */
                            function isMatchWith(object, source, customizer) {
                                customizer = typeof customizer == 'function' ? customizer : undefined;
                                return baseIsMatch(object, source, getMatchData(source), customizer);
                            }

                            /**
                             * Checks if `value` is `NaN`.
                             *
                             * **Note:** This method is based on
                             * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
                             * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
                             * `undefined` and other non-number values.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
                             * @example
                             *
                             * _.isNaN(NaN);
                             * // => true
                             *
                             * _.isNaN(new Number(NaN));
                             * // => true
                             *
                             * isNaN(undefined);
                             * // => true
                             *
                             * _.isNaN(undefined);
                             * // => false
                             */
                            function isNaN(value) {
                                // An `NaN` primitive is the only value that is not equal to itself.
                                // Perform the `toStringTag` check first to avoid errors with some
                                // ActiveX objects in IE.
                                return isNumber(value) && value != +value;
                            }

                            /**
                             * Checks if `value` is a pristine native function.
                             *
                             * **Note:** This method can't reliably detect native functions in the presence
                             * of the core-js package because core-js circumvents this kind of detection.
                             * Despite multiple requests, the core-js maintainer has made it clear: any
                             * attempt to fix the detection will be obstructed. As a result, we're left
                             * with little choice but to throw an error. Unfortunately, this also affects
                             * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
                             * which rely on core-js.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a native function,
                             *  else `false`.
                             * @example
                             *
                             * _.isNative(Array.prototype.push);
                             * // => true
                             *
                             * _.isNative(_);
                             * // => false
                             */
                            function isNative(value) {
                                if (isMaskable(value)) {
                                    throw new Error(CORE_ERROR_TEXT);
                                }
                                return baseIsNative(value);
                            }

                            /**
                             * Checks if `value` is `null`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
                             * @example
                             *
                             * _.isNull(null);
                             * // => true
                             *
                             * _.isNull(void 0);
                             * // => false
                             */
                            function isNull(value) {
                                return value === null;
                            }

                            /**
                             * Checks if `value` is `null` or `undefined`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
                             * @example
                             *
                             * _.isNil(null);
                             * // => true
                             *
                             * _.isNil(void 0);
                             * // => true
                             *
                             * _.isNil(NaN);
                             * // => false
                             */
                            function isNil(value) {
                                return value == null;
                            }

                            /**
                             * Checks if `value` is classified as a `Number` primitive or object.
                             *
                             * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
                             * classified as numbers, use the `_.isFinite` method.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a number, else `false`.
                             * @example
                             *
                             * _.isNumber(3);
                             * // => true
                             *
                             * _.isNumber(Number.MIN_VALUE);
                             * // => true
                             *
                             * _.isNumber(Infinity);
                             * // => true
                             *
                             * _.isNumber('3');
                             * // => false
                             */
                            function isNumber(value) {
                                return typeof value == 'number' ||
                                    (isObjectLike(value) && baseGetTag(value) == numberTag);
                            }

                            /**
                             * Checks if `value` is a plain object, that is, an object created by the
                             * `Object` constructor or one with a `[[Prototype]]` of `null`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.8.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             * }
                             *
                             * _.isPlainObject(new Foo);
                             * // => false
                             *
                             * _.isPlainObject([1, 2, 3]);
                             * // => false
                             *
                             * _.isPlainObject({ 'x': 0, 'y': 0 });
                             * // => true
                             *
                             * _.isPlainObject(Object.create(null));
                             * // => true
                             */
                            function isPlainObject(value) {
                                if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
                                    return false;
                                }
                                var proto = getPrototype(value);
                                if (proto === null) {
                                    return true;
                                }
                                var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
                                return typeof Ctor == 'function' && Ctor instanceof Ctor &&
                                    funcToString.call(Ctor) == objectCtorString;
                            }

                            /**
                             * Checks if `value` is classified as a `RegExp` object.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.1.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
                             * @example
                             *
                             * _.isRegExp(/abc/);
                             * // => true
                             *
                             * _.isRegExp('/abc/');
                             * // => false
                             */
                            var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;

                            /**
                             * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
                             * double precision number which isn't the result of a rounded unsafe integer.
                             *
                             * **Note:** This method is based on
                             * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
                             * @example
                             *
                             * _.isSafeInteger(3);
                             * // => true
                             *
                             * _.isSafeInteger(Number.MIN_VALUE);
                             * // => false
                             *
                             * _.isSafeInteger(Infinity);
                             * // => false
                             *
                             * _.isSafeInteger('3');
                             * // => false
                             */
                            function isSafeInteger(value) {
                                return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
                            }

                            /**
                             * Checks if `value` is classified as a `Set` object.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.3.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a set, else `false`.
                             * @example
                             *
                             * _.isSet(new Set);
                             * // => true
                             *
                             * _.isSet(new WeakSet);
                             * // => false
                             */
                            var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;

                            /**
                             * Checks if `value` is classified as a `String` primitive or object.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a string, else `false`.
                             * @example
                             *
                             * _.isString('abc');
                             * // => true
                             *
                             * _.isString(1);
                             * // => false
                             */
                            function isString(value) {
                                return typeof value == 'string' ||
                                    (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
                            }

                            /**
                             * Checks if `value` is classified as a `Symbol` primitive or object.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
                             * @example
                             *
                             * _.isSymbol(Symbol.iterator);
                             * // => true
                             *
                             * _.isSymbol('abc');
                             * // => false
                             */
                            function isSymbol(value) {
                                return typeof value == 'symbol' ||
                                    (isObjectLike(value) && baseGetTag(value) == symbolTag);
                            }

                            /**
                             * Checks if `value` is classified as a typed array.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
                             * @example
                             *
                             * _.isTypedArray(new Uint8Array);
                             * // => true
                             *
                             * _.isTypedArray([]);
                             * // => false
                             */
                            var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;

                            /**
                             * Checks if `value` is `undefined`.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
                             * @example
                             *
                             * _.isUndefined(void 0);
                             * // => true
                             *
                             * _.isUndefined(null);
                             * // => false
                             */
                            function isUndefined(value) {
                                return value === undefined;
                            }

                            /**
                             * Checks if `value` is classified as a `WeakMap` object.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.3.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
                             * @example
                             *
                             * _.isWeakMap(new WeakMap);
                             * // => true
                             *
                             * _.isWeakMap(new Map);
                             * // => false
                             */
                            function isWeakMap(value) {
                                return isObjectLike(value) && getTag(value) == weakMapTag;
                            }

                            /**
                             * Checks if `value` is classified as a `WeakSet` object.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.3.0
                             * @category Lang
                             * @param {*} value The value to check.
                             * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
                             * @example
                             *
                             * _.isWeakSet(new WeakSet);
                             * // => true
                             *
                             * _.isWeakSet(new Set);
                             * // => false
                             */
                            function isWeakSet(value) {
                                return isObjectLike(value) && baseGetTag(value) == weakSetTag;
                            }

                            /**
                             * Checks if `value` is less than `other`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.9.0
                             * @category Lang
                             * @param {*} value The value to compare.
                             * @param {*} other The other value to compare.
                             * @returns {boolean} Returns `true` if `value` is less than `other`,
                             *  else `false`.
                             * @see _.gt
                             * @example
                             *
                             * _.lt(1, 3);
                             * // => true
                             *
                             * _.lt(3, 3);
                             * // => false
                             *
                             * _.lt(3, 1);
                             * // => false
                             */
                            var lt = createRelationalOperation(baseLt);

                            /**
                             * Checks if `value` is less than or equal to `other`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.9.0
                             * @category Lang
                             * @param {*} value The value to compare.
                             * @param {*} other The other value to compare.
                             * @returns {boolean} Returns `true` if `value` is less than or equal to
                             *  `other`, else `false`.
                             * @see _.gte
                             * @example
                             *
                             * _.lte(1, 3);
                             * // => true
                             *
                             * _.lte(3, 3);
                             * // => true
                             *
                             * _.lte(3, 1);
                             * // => false
                             */
                            var lte = createRelationalOperation(function(value, other) {
                                return value <= other;
                            });

                            /**
                             * Converts `value` to an array.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Lang
                             * @param {*} value The value to convert.
                             * @returns {Array} Returns the converted array.
                             * @example
                             *
                             * _.toArray({ 'a': 1, 'b': 2 });
                             * // => [1, 2]
                             *
                             * _.toArray('abc');
                             * // => ['a', 'b', 'c']
                             *
                             * _.toArray(1);
                             * // => []
                             *
                             * _.toArray(null);
                             * // => []
                             */
                            function toArray(value) {
                                if (!value) {
                                    return [];
                                }
                                if (isArrayLike(value)) {
                                    return isString(value) ? stringToArray(value) : copyArray(value);
                                }
                                if (symIterator && value[symIterator]) {
                                    return iteratorToArray(value[symIterator]());
                                }
                                var tag = getTag(value),
                                    func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);

                                return func(value);
                            }

                            /**
                             * Converts `value` to a finite number.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.12.0
                             * @category Lang
                             * @param {*} value The value to convert.
                             * @returns {number} Returns the converted number.
                             * @example
                             *
                             * _.toFinite(3.2);
                             * // => 3.2
                             *
                             * _.toFinite(Number.MIN_VALUE);
                             * // => 5e-324
                             *
                             * _.toFinite(Infinity);
                             * // => 1.7976931348623157e+308
                             *
                             * _.toFinite('3.2');
                             * // => 3.2
                             */
                            function toFinite(value) {
                                if (!value) {
                                    return value === 0 ? value : 0;
                                }
                                value = toNumber(value);
                                if (value === INFINITY || value === -INFINITY) {
                                    var sign = (value < 0 ? -1 : 1);
                                    return sign * MAX_INTEGER;
                                }
                                return value === value ? value : 0;
                            }

                            /**
                             * Converts `value` to an integer.
                             *
                             * **Note:** This method is loosely based on
                             * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to convert.
                             * @returns {number} Returns the converted integer.
                             * @example
                             *
                             * _.toInteger(3.2);
                             * // => 3
                             *
                             * _.toInteger(Number.MIN_VALUE);
                             * // => 0
                             *
                             * _.toInteger(Infinity);
                             * // => 1.7976931348623157e+308
                             *
                             * _.toInteger('3.2');
                             * // => 3
                             */
                            function toInteger(value) {
                                var result = toFinite(value),
                                    remainder = result % 1;

                                return result === result ? (remainder ? result - remainder : result) : 0;
                            }

                            /**
                             * Converts `value` to an integer suitable for use as the length of an
                             * array-like object.
                             *
                             * **Note:** This method is based on
                             * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to convert.
                             * @returns {number} Returns the converted integer.
                             * @example
                             *
                             * _.toLength(3.2);
                             * // => 3
                             *
                             * _.toLength(Number.MIN_VALUE);
                             * // => 0
                             *
                             * _.toLength(Infinity);
                             * // => 4294967295
                             *
                             * _.toLength('3.2');
                             * // => 3
                             */
                            function toLength(value) {
                                return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
                            }

                            /**
                             * Converts `value` to a number.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to process.
                             * @returns {number} Returns the number.
                             * @example
                             *
                             * _.toNumber(3.2);
                             * // => 3.2
                             *
                             * _.toNumber(Number.MIN_VALUE);
                             * // => 5e-324
                             *
                             * _.toNumber(Infinity);
                             * // => Infinity
                             *
                             * _.toNumber('3.2');
                             * // => 3.2
                             */
                            function toNumber(value) {
                                if (typeof value == 'number') {
                                    return value;
                                }
                                if (isSymbol(value)) {
                                    return NAN;
                                }
                                if (isObject(value)) {
                                    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
                                    value = isObject(other) ? (other + '') : other;
                                }
                                if (typeof value != 'string') {
                                    return value === 0 ? value : +value;
                                }
                                value = value.replace(reTrim, '');
                                var isBinary = reIsBinary.test(value);
                                return (isBinary || reIsOctal.test(value)) ?
                                    freeParseInt(value.slice(2), isBinary ? 2 : 8) :
                                    (reIsBadHex.test(value) ? NAN : +value);
                            }

                            /**
                             * Converts `value` to a plain object flattening inherited enumerable string
                             * keyed properties of `value` to own properties of the plain object.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Lang
                             * @param {*} value The value to convert.
                             * @returns {Object} Returns the converted plain object.
                             * @example
                             *
                             * function Foo() {
                             *   this.b = 2;
                             * }
                             *
                             * Foo.prototype.c = 3;
                             *
                             * _.assign({ 'a': 1 }, new Foo);
                             * // => { 'a': 1, 'b': 2 }
                             *
                             * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
                             * // => { 'a': 1, 'b': 2, 'c': 3 }
                             */
                            function toPlainObject(value) {
                                return copyObject(value, keysIn(value));
                            }

                            /**
                             * Converts `value` to a safe integer. A safe integer can be compared and
                             * represented correctly.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to convert.
                             * @returns {number} Returns the converted integer.
                             * @example
                             *
                             * _.toSafeInteger(3.2);
                             * // => 3
                             *
                             * _.toSafeInteger(Number.MIN_VALUE);
                             * // => 0
                             *
                             * _.toSafeInteger(Infinity);
                             * // => 9007199254740991
                             *
                             * _.toSafeInteger('3.2');
                             * // => 3
                             */
                            function toSafeInteger(value) {
                                return value ?
                                    baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER) :
                                    (value === 0 ? value : 0);
                            }

                            /**
                             * Converts `value` to a string. An empty string is returned for `null`
                             * and `undefined` values. The sign of `-0` is preserved.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Lang
                             * @param {*} value The value to convert.
                             * @returns {string} Returns the converted string.
                             * @example
                             *
                             * _.toString(null);
                             * // => ''
                             *
                             * _.toString(-0);
                             * // => '-0'
                             *
                             * _.toString([1, 2, 3]);
                             * // => '1,2,3'
                             */
                            function toString(value) {
                                return value == null ? '' : baseToString(value);
                            }

                            /*------------------------------------------------------------------------*/

                            /**
                             * Assigns own enumerable string keyed properties of source objects to the
                             * destination object. Source objects are applied from left to right.
                             * Subsequent sources overwrite property assignments of previous sources.
                             *
                             * **Note:** This method mutates `object` and is loosely based on
                             * [`Object.assign`](https://mdn.io/Object/assign).
                             *
                             * @static
                             * @memberOf _
                             * @since 0.10.0
                             * @category Object
                             * @param {Object} object The destination object.
                             * @param {...Object} [sources] The source objects.
                             * @returns {Object} Returns `object`.
                             * @see _.assignIn
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             * }
                             *
                             * function Bar() {
                             *   this.c = 3;
                             * }
                             *
                             * Foo.prototype.b = 2;
                             * Bar.prototype.d = 4;
                             *
                             * _.assign({ 'a': 0 }, new Foo, new Bar);
                             * // => { 'a': 1, 'c': 3 }
                             */
                            var assign = createAssigner(function(object, source) {
                                if (isPrototype(source) || isArrayLike(source)) {
                                    copyObject(source, keys(source), object);
                                    return;
                                }
                                for (var key in source) {
                                    if (hasOwnProperty.call(source, key)) {
                                        assignValue(object, key, source[key]);
                                    }
                                }
                            });

                            /**
                             * This method is like `_.assign` except that it iterates over own and
                             * inherited source properties.
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @alias extend
                             * @category Object
                             * @param {Object} object The destination object.
                             * @param {...Object} [sources] The source objects.
                             * @returns {Object} Returns `object`.
                             * @see _.assign
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             * }
                             *
                             * function Bar() {
                             *   this.c = 3;
                             * }
                             *
                             * Foo.prototype.b = 2;
                             * Bar.prototype.d = 4;
                             *
                             * _.assignIn({ 'a': 0 }, new Foo, new Bar);
                             * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
                             */
                            var assignIn = createAssigner(function(object, source) {
                                copyObject(source, keysIn(source), object);
                            });

                            /**
                             * This method is like `_.assignIn` except that it accepts `customizer`
                             * which is invoked to produce the assigned values. If `customizer` returns
                             * `undefined`, assignment is handled by the method instead. The `customizer`
                             * is invoked with five arguments: (objValue, srcValue, key, object, source).
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @alias extendWith
                             * @category Object
                             * @param {Object} object The destination object.
                             * @param {...Object} sources The source objects.
                             * @param {Function} [customizer] The function to customize assigned values.
                             * @returns {Object} Returns `object`.
                             * @see _.assignWith
                             * @example
                             *
                             * function customizer(objValue, srcValue) {
                             *   return _.isUndefined(objValue) ? srcValue : objValue;
                             * }
                             *
                             * var defaults = _.partialRight(_.assignInWith, customizer);
                             *
                             * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
                             * // => { 'a': 1, 'b': 2 }
                             */
                            var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
                                copyObject(source, keysIn(source), object, customizer);
                            });

                            /**
                             * This method is like `_.assign` except that it accepts `customizer`
                             * which is invoked to produce the assigned values. If `customizer` returns
                             * `undefined`, assignment is handled by the method instead. The `customizer`
                             * is invoked with five arguments: (objValue, srcValue, key, object, source).
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Object
                             * @param {Object} object The destination object.
                             * @param {...Object} sources The source objects.
                             * @param {Function} [customizer] The function to customize assigned values.
                             * @returns {Object} Returns `object`.
                             * @see _.assignInWith
                             * @example
                             *
                             * function customizer(objValue, srcValue) {
                             *   return _.isUndefined(objValue) ? srcValue : objValue;
                             * }
                             *
                             * var defaults = _.partialRight(_.assignWith, customizer);
                             *
                             * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
                             * // => { 'a': 1, 'b': 2 }
                             */
                            var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
                                copyObject(source, keys(source), object, customizer);
                            });

                            /**
                             * Creates an array of values corresponding to `paths` of `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 1.0.0
                             * @category Object
                             * @param {Object} object The object to iterate over.
                             * @param {...(string|string[])} [paths] The property paths to pick.
                             * @returns {Array} Returns the picked values.
                             * @example
                             *
                             * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
                             *
                             * _.at(object, ['a[0].b.c', 'a[1]']);
                             * // => [3, 4]
                             */
                            var at = flatRest(baseAt);

                            /**
                             * Creates an object that inherits from the `prototype` object. If a
                             * `properties` object is given, its own enumerable string keyed properties
                             * are assigned to the created object.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.3.0
                             * @category Object
                             * @param {Object} prototype The object to inherit from.
                             * @param {Object} [properties] The properties to assign to the object.
                             * @returns {Object} Returns the new object.
                             * @example
                             *
                             * function Shape() {
                             *   this.x = 0;
                             *   this.y = 0;
                             * }
                             *
                             * function Circle() {
                             *   Shape.call(this);
                             * }
                             *
                             * Circle.prototype = _.create(Shape.prototype, {
                             *   'constructor': Circle
                             * });
                             *
                             * var circle = new Circle;
                             * circle instanceof Circle;
                             * // => true
                             *
                             * circle instanceof Shape;
                             * // => true
                             */
                            function create(prototype, properties) {
                                var result = baseCreate(prototype);
                                return properties == null ? result : baseAssign(result, properties);
                            }

                            /**
                             * Assigns own and inherited enumerable string keyed properties of source
                             * objects to the destination object for all destination properties that
                             * resolve to `undefined`. Source objects are applied from left to right.
                             * Once a property is set, additional values of the same property are ignored.
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Object
                             * @param {Object} object The destination object.
                             * @param {...Object} [sources] The source objects.
                             * @returns {Object} Returns `object`.
                             * @see _.defaultsDeep
                             * @example
                             *
                             * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
                             * // => { 'a': 1, 'b': 2 }
                             */
                            var defaults = baseRest(function(args) {
                                args.push(undefined, customDefaultsAssignIn);
                                return apply(assignInWith, undefined, args);
                            });

                            /**
                             * This method is like `_.defaults` except that it recursively assigns
                             * default properties.
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.10.0
                             * @category Object
                             * @param {Object} object The destination object.
                             * @param {...Object} [sources] The source objects.
                             * @returns {Object} Returns `object`.
                             * @see _.defaults
                             * @example
                             *
                             * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
                             * // => { 'a': { 'b': 2, 'c': 3 } }
                             */
                            var defaultsDeep = baseRest(function(args) {
                                args.push(undefined, customDefaultsMerge);
                                return apply(mergeWith, undefined, args);
                            });

                            /**
                             * This method is like `_.find` except that it returns the key of the first
                             * element `predicate` returns truthy for instead of the element itself.
                             *
                             * @static
                             * @memberOf _
                             * @since 1.1.0
                             * @category Object
                             * @param {Object} object The object to inspect.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @returns {string|undefined} Returns the key of the matched element,
                             *  else `undefined`.
                             * @example
                             *
                             * var users = {
                             *   'barney':  { 'age': 36, 'active': true },
                             *   'fred':    { 'age': 40, 'active': false },
                             *   'pebbles': { 'age': 1,  'active': true }
                             * };
                             *
                             * _.findKey(users, function(o) { return o.age < 40; });
                             * // => 'barney' (iteration order is not guaranteed)
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.findKey(users, { 'age': 1, 'active': true });
                             * // => 'pebbles'
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.findKey(users, ['active', false]);
                             * // => 'fred'
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.findKey(users, 'active');
                             * // => 'barney'
                             */
                            function findKey(object, predicate) {
                                return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
                            }

                            /**
                             * This method is like `_.findKey` except that it iterates over elements of
                             * a collection in the opposite order.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.0.0
                             * @category Object
                             * @param {Object} object The object to inspect.
                             * @param {Function} [predicate=_.identity] The function invoked per iteration.
                             * @returns {string|undefined} Returns the key of the matched element,
                             *  else `undefined`.
                             * @example
                             *
                             * var users = {
                             *   'barney':  { 'age': 36, 'active': true },
                             *   'fred':    { 'age': 40, 'active': false },
                             *   'pebbles': { 'age': 1,  'active': true }
                             * };
                             *
                             * _.findLastKey(users, function(o) { return o.age < 40; });
                             * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.findLastKey(users, { 'age': 36, 'active': true });
                             * // => 'barney'
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.findLastKey(users, ['active', false]);
                             * // => 'fred'
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.findLastKey(users, 'active');
                             * // => 'pebbles'
                             */
                            function findLastKey(object, predicate) {
                                return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
                            }

                            /**
                             * Iterates over own and inherited enumerable string keyed properties of an
                             * object and invokes `iteratee` for each property. The iteratee is invoked
                             * with three arguments: (value, key, object). Iteratee functions may exit
                             * iteration early by explicitly returning `false`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.3.0
                             * @category Object
                             * @param {Object} object The object to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Object} Returns `object`.
                             * @see _.forInRight
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             *   this.b = 2;
                             * }
                             *
                             * Foo.prototype.c = 3;
                             *
                             * _.forIn(new Foo, function(value, key) {
                             *   console.log(key);
                             * });
                             * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
                             */
                            function forIn(object, iteratee) {
                                return object == null ?
                                    object :
                                    baseFor(object, getIteratee(iteratee, 3), keysIn);
                            }

                            /**
                             * This method is like `_.forIn` except that it iterates over properties of
                             * `object` in the opposite order.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.0.0
                             * @category Object
                             * @param {Object} object The object to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Object} Returns `object`.
                             * @see _.forIn
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             *   this.b = 2;
                             * }
                             *
                             * Foo.prototype.c = 3;
                             *
                             * _.forInRight(new Foo, function(value, key) {
                             *   console.log(key);
                             * });
                             * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
                             */
                            function forInRight(object, iteratee) {
                                return object == null ?
                                    object :
                                    baseForRight(object, getIteratee(iteratee, 3), keysIn);
                            }

                            /**
                             * Iterates over own enumerable string keyed properties of an object and
                             * invokes `iteratee` for each property. The iteratee is invoked with three
                             * arguments: (value, key, object). Iteratee functions may exit iteration
                             * early by explicitly returning `false`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.3.0
                             * @category Object
                             * @param {Object} object The object to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Object} Returns `object`.
                             * @see _.forOwnRight
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             *   this.b = 2;
                             * }
                             *
                             * Foo.prototype.c = 3;
                             *
                             * _.forOwn(new Foo, function(value, key) {
                             *   console.log(key);
                             * });
                             * // => Logs 'a' then 'b' (iteration order is not guaranteed).
                             */
                            function forOwn(object, iteratee) {
                                return object && baseForOwn(object, getIteratee(iteratee, 3));
                            }

                            /**
                             * This method is like `_.forOwn` except that it iterates over properties of
                             * `object` in the opposite order.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.0.0
                             * @category Object
                             * @param {Object} object The object to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Object} Returns `object`.
                             * @see _.forOwn
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             *   this.b = 2;
                             * }
                             *
                             * Foo.prototype.c = 3;
                             *
                             * _.forOwnRight(new Foo, function(value, key) {
                             *   console.log(key);
                             * });
                             * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
                             */
                            function forOwnRight(object, iteratee) {
                                return object && baseForOwnRight(object, getIteratee(iteratee, 3));
                            }

                            /**
                             * Creates an array of function property names from own enumerable properties
                             * of `object`.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Object
                             * @param {Object} object The object to inspect.
                             * @returns {Array} Returns the function names.
                             * @see _.functionsIn
                             * @example
                             *
                             * function Foo() {
                             *   this.a = _.constant('a');
                             *   this.b = _.constant('b');
                             * }
                             *
                             * Foo.prototype.c = _.constant('c');
                             *
                             * _.functions(new Foo);
                             * // => ['a', 'b']
                             */
                            function functions(object) {
                                return object == null ? [] : baseFunctions(object, keys(object));
                            }

                            /**
                             * Creates an array of function property names from own and inherited
                             * enumerable properties of `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Object
                             * @param {Object} object The object to inspect.
                             * @returns {Array} Returns the function names.
                             * @see _.functions
                             * @example
                             *
                             * function Foo() {
                             *   this.a = _.constant('a');
                             *   this.b = _.constant('b');
                             * }
                             *
                             * Foo.prototype.c = _.constant('c');
                             *
                             * _.functionsIn(new Foo);
                             * // => ['a', 'b', 'c']
                             */
                            function functionsIn(object) {
                                return object == null ? [] : baseFunctions(object, keysIn(object));
                            }

                            /**
                             * Gets the value at `path` of `object`. If the resolved value is
                             * `undefined`, the `defaultValue` is returned in its place.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.7.0
                             * @category Object
                             * @param {Object} object The object to query.
                             * @param {Array|string} path The path of the property to get.
                             * @param {*} [defaultValue] The value returned for `undefined` resolved values.
                             * @returns {*} Returns the resolved value.
                             * @example
                             *
                             * var object = { 'a': [{ 'b': { 'c': 3 } }] };
                             *
                             * _.get(object, 'a[0].b.c');
                             * // => 3
                             *
                             * _.get(object, ['a', '0', 'b', 'c']);
                             * // => 3
                             *
                             * _.get(object, 'a.b.c', 'default');
                             * // => 'default'
                             */
                            function get(object, path, defaultValue) {
                                var result = object == null ? undefined : baseGet(object, path);
                                return result === undefined ? defaultValue : result;
                            }

                            /**
                             * Checks if `path` is a direct property of `object`.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Object
                             * @param {Object} object The object to query.
                             * @param {Array|string} path The path to check.
                             * @returns {boolean} Returns `true` if `path` exists, else `false`.
                             * @example
                             *
                             * var object = { 'a': { 'b': 2 } };
                             * var other = _.create({ 'a': _.create({ 'b': 2 }) });
                             *
                             * _.has(object, 'a');
                             * // => true
                             *
                             * _.has(object, 'a.b');
                             * // => true
                             *
                             * _.has(object, ['a', 'b']);
                             * // => true
                             *
                             * _.has(other, 'a');
                             * // => false
                             */
                            function has(object, path) {
                                return object != null && hasPath(object, path, baseHas);
                            }

                            /**
                             * Checks if `path` is a direct or inherited property of `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Object
                             * @param {Object} object The object to query.
                             * @param {Array|string} path The path to check.
                             * @returns {boolean} Returns `true` if `path` exists, else `false`.
                             * @example
                             *
                             * var object = _.create({ 'a': _.create({ 'b': 2 }) });
                             *
                             * _.hasIn(object, 'a');
                             * // => true
                             *
                             * _.hasIn(object, 'a.b');
                             * // => true
                             *
                             * _.hasIn(object, ['a', 'b']);
                             * // => true
                             *
                             * _.hasIn(object, 'b');
                             * // => false
                             */
                            function hasIn(object, path) {
                                return object != null && hasPath(object, path, baseHasIn);
                            }

                            /**
                             * Creates an object composed of the inverted keys and values of `object`.
                             * If `object` contains duplicate values, subsequent values overwrite
                             * property assignments of previous values.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.7.0
                             * @category Object
                             * @param {Object} object The object to invert.
                             * @returns {Object} Returns the new inverted object.
                             * @example
                             *
                             * var object = { 'a': 1, 'b': 2, 'c': 1 };
                             *
                             * _.invert(object);
                             * // => { '1': 'c', '2': 'b' }
                             */
                            var invert = createInverter(function(result, value, key) {
                                result[value] = key;
                            }, constant(identity));

                            /**
                             * This method is like `_.invert` except that the inverted object is generated
                             * from the results of running each element of `object` thru `iteratee`. The
                             * corresponding inverted value of each inverted key is an array of keys
                             * responsible for generating the inverted value. The iteratee is invoked
                             * with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.1.0
                             * @category Object
                             * @param {Object} object The object to invert.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {Object} Returns the new inverted object.
                             * @example
                             *
                             * var object = { 'a': 1, 'b': 2, 'c': 1 };
                             *
                             * _.invertBy(object);
                             * // => { '1': ['a', 'c'], '2': ['b'] }
                             *
                             * _.invertBy(object, function(value) {
                             *   return 'group' + value;
                             * });
                             * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
                             */
                            var invertBy = createInverter(function(result, value, key) {
                                if (hasOwnProperty.call(result, value)) {
                                    result[value].push(key);
                                } else {
                                    result[value] = [key];
                                }
                            }, getIteratee);

                            /**
                             * Invokes the method at `path` of `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Object
                             * @param {Object} object The object to query.
                             * @param {Array|string} path The path of the method to invoke.
                             * @param {...*} [args] The arguments to invoke the method with.
                             * @returns {*} Returns the result of the invoked method.
                             * @example
                             *
                             * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
                             *
                             * _.invoke(object, 'a[0].b.c.slice', 1, 3);
                             * // => [2, 3]
                             */
                            var invoke = baseRest(baseInvoke);

                            /**
                             * Creates an array of the own enumerable property names of `object`.
                             *
                             * **Note:** Non-object values are coerced to objects. See the
                             * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
                             * for more details.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Object
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the array of property names.
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             *   this.b = 2;
                             * }
                             *
                             * Foo.prototype.c = 3;
                             *
                             * _.keys(new Foo);
                             * // => ['a', 'b'] (iteration order is not guaranteed)
                             *
                             * _.keys('hi');
                             * // => ['0', '1']
                             */
                            function keys(object) {
                                return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
                            }

                            /**
                             * Creates an array of the own and inherited enumerable property names of `object`.
                             *
                             * **Note:** Non-object values are coerced to objects.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Object
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the array of property names.
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             *   this.b = 2;
                             * }
                             *
                             * Foo.prototype.c = 3;
                             *
                             * _.keysIn(new Foo);
                             * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
                             */
                            function keysIn(object) {
                                return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
                            }

                            /**
                             * The opposite of `_.mapValues`; this method creates an object with the
                             * same values as `object` and keys generated by running each own enumerable
                             * string keyed property of `object` thru `iteratee`. The iteratee is invoked
                             * with three arguments: (value, key, object).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.8.0
                             * @category Object
                             * @param {Object} object The object to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Object} Returns the new mapped object.
                             * @see _.mapValues
                             * @example
                             *
                             * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
                             *   return key + value;
                             * });
                             * // => { 'a1': 1, 'b2': 2 }
                             */
                            function mapKeys(object, iteratee) {
                                var result = {};
                                iteratee = getIteratee(iteratee, 3);

                                baseForOwn(object, function(value, key, object) {
                                    baseAssignValue(result, iteratee(value, key, object), value);
                                });
                                return result;
                            }

                            /**
                             * Creates an object with the same keys as `object` and values generated
                             * by running each own enumerable string keyed property of `object` thru
                             * `iteratee`. The iteratee is invoked with three arguments:
                             * (value, key, object).
                             *
                             * @static
                             * @memberOf _
                             * @since 2.4.0
                             * @category Object
                             * @param {Object} object The object to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Object} Returns the new mapped object.
                             * @see _.mapKeys
                             * @example
                             *
                             * var users = {
                             *   'fred':    { 'user': 'fred',    'age': 40 },
                             *   'pebbles': { 'user': 'pebbles', 'age': 1 }
                             * };
                             *
                             * _.mapValues(users, function(o) { return o.age; });
                             * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.mapValues(users, 'age');
                             * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
                             */
                            function mapValues(object, iteratee) {
                                var result = {};
                                iteratee = getIteratee(iteratee, 3);

                                baseForOwn(object, function(value, key, object) {
                                    baseAssignValue(result, key, iteratee(value, key, object));
                                });
                                return result;
                            }

                            /**
                             * This method is like `_.assign` except that it recursively merges own and
                             * inherited enumerable string keyed properties of source objects into the
                             * destination object. Source properties that resolve to `undefined` are
                             * skipped if a destination value exists. Array and plain object properties
                             * are merged recursively. Other objects and value types are overridden by
                             * assignment. Source objects are applied from left to right. Subsequent
                             * sources overwrite property assignments of previous sources.
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.5.0
                             * @category Object
                             * @param {Object} object The destination object.
                             * @param {...Object} [sources] The source objects.
                             * @returns {Object} Returns `object`.
                             * @example
                             *
                             * var object = {
                             *   'a': [{ 'b': 2 }, { 'd': 4 }]
                             * };
                             *
                             * var other = {
                             *   'a': [{ 'c': 3 }, { 'e': 5 }]
                             * };
                             *
                             * _.merge(object, other);
                             * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
                             */
                            var merge = createAssigner(function(object, source, srcIndex) {
                                baseMerge(object, source, srcIndex);
                            });

                            /**
                             * This method is like `_.merge` except that it accepts `customizer` which
                             * is invoked to produce the merged values of the destination and source
                             * properties. If `customizer` returns `undefined`, merging is handled by the
                             * method instead. The `customizer` is invoked with six arguments:
                             * (objValue, srcValue, key, object, source, stack).
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Object
                             * @param {Object} object The destination object.
                             * @param {...Object} sources The source objects.
                             * @param {Function} customizer The function to customize assigned values.
                             * @returns {Object} Returns `object`.
                             * @example
                             *
                             * function customizer(objValue, srcValue) {
                             *   if (_.isArray(objValue)) {
                             *     return objValue.concat(srcValue);
                             *   }
                             * }
                             *
                             * var object = { 'a': [1], 'b': [2] };
                             * var other = { 'a': [3], 'b': [4] };
                             *
                             * _.mergeWith(object, other, customizer);
                             * // => { 'a': [1, 3], 'b': [2, 4] }
                             */
                            var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
                                baseMerge(object, source, srcIndex, customizer);
                            });

                            /**
                             * The opposite of `_.pick`; this method creates an object composed of the
                             * own and inherited enumerable property paths of `object` that are not omitted.
                             *
                             * **Note:** This method is considerably slower than `_.pick`.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Object
                             * @param {Object} object The source object.
                             * @param {...(string|string[])} [paths] The property paths to omit.
                             * @returns {Object} Returns the new object.
                             * @example
                             *
                             * var object = { 'a': 1, 'b': '2', 'c': 3 };
                             *
                             * _.omit(object, ['a', 'c']);
                             * // => { 'b': '2' }
                             */
                            var omit = flatRest(function(object, paths) {
                                var result = {};
                                if (object == null) {
                                    return result;
                                }
                                var isDeep = false;
                                paths = arrayMap(paths, function(path) {
                                    path = castPath(path, object);
                                    isDeep || (isDeep = path.length > 1);
                                    return path;
                                });
                                copyObject(object, getAllKeysIn(object), result);
                                if (isDeep) {
                                    result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
                                }
                                var length = paths.length;
                                while (length--) {
                                    baseUnset(result, paths[length]);
                                }
                                return result;
                            });

                            /**
                             * The opposite of `_.pickBy`; this method creates an object composed of
                             * the own and inherited enumerable string keyed properties of `object` that
                             * `predicate` doesn't return truthy for. The predicate is invoked with two
                             * arguments: (value, key).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Object
                             * @param {Object} object The source object.
                             * @param {Function} [predicate=_.identity] The function invoked per property.
                             * @returns {Object} Returns the new object.
                             * @example
                             *
                             * var object = { 'a': 1, 'b': '2', 'c': 3 };
                             *
                             * _.omitBy(object, _.isNumber);
                             * // => { 'b': '2' }
                             */
                            function omitBy(object, predicate) {
                                return pickBy(object, negate(getIteratee(predicate)));
                            }

                            /**
                             * Creates an object composed of the picked `object` properties.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Object
                             * @param {Object} object The source object.
                             * @param {...(string|string[])} [paths] The property paths to pick.
                             * @returns {Object} Returns the new object.
                             * @example
                             *
                             * var object = { 'a': 1, 'b': '2', 'c': 3 };
                             *
                             * _.pick(object, ['a', 'c']);
                             * // => { 'a': 1, 'c': 3 }
                             */
                            var pick = flatRest(function(object, paths) {
                                return object == null ? {} : basePick(object, paths);
                            });

                            /**
                             * Creates an object composed of the `object` properties `predicate` returns
                             * truthy for. The predicate is invoked with two arguments: (value, key).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Object
                             * @param {Object} object The source object.
                             * @param {Function} [predicate=_.identity] The function invoked per property.
                             * @returns {Object} Returns the new object.
                             * @example
                             *
                             * var object = { 'a': 1, 'b': '2', 'c': 3 };
                             *
                             * _.pickBy(object, _.isNumber);
                             * // => { 'a': 1, 'c': 3 }
                             */
                            function pickBy(object, predicate) {
                                if (object == null) {
                                    return {};
                                }
                                var props = arrayMap(getAllKeysIn(object), function(prop) {
                                    return [prop];
                                });
                                predicate = getIteratee(predicate);
                                return basePickBy(object, props, function(value, path) {
                                    return predicate(value, path[0]);
                                });
                            }

                            /**
                             * This method is like `_.get` except that if the resolved value is a
                             * function it's invoked with the `this` binding of its parent object and
                             * its result is returned.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Object
                             * @param {Object} object The object to query.
                             * @param {Array|string} path The path of the property to resolve.
                             * @param {*} [defaultValue] The value returned for `undefined` resolved values.
                             * @returns {*} Returns the resolved value.
                             * @example
                             *
                             * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
                             *
                             * _.result(object, 'a[0].b.c1');
                             * // => 3
                             *
                             * _.result(object, 'a[0].b.c2');
                             * // => 4
                             *
                             * _.result(object, 'a[0].b.c3', 'default');
                             * // => 'default'
                             *
                             * _.result(object, 'a[0].b.c3', _.constant('default'));
                             * // => 'default'
                             */
                            function result(object, path, defaultValue) {
                                path = castPath(path, object);

                                var index = -1,
                                    length = path.length;

                                // Ensure the loop is entered when path is empty.
                                if (!length) {
                                    length = 1;
                                    object = undefined;
                                }
                                while (++index < length) {
                                    var value = object == null ? undefined : object[toKey(path[index])];
                                    if (value === undefined) {
                                        index = length;
                                        value = defaultValue;
                                    }
                                    object = isFunction(value) ? value.call(object) : value;
                                }
                                return object;
                            }

                            /**
                             * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
                             * it's created. Arrays are created for missing index properties while objects
                             * are created for all other missing properties. Use `_.setWith` to customize
                             * `path` creation.
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.7.0
                             * @category Object
                             * @param {Object} object The object to modify.
                             * @param {Array|string} path The path of the property to set.
                             * @param {*} value The value to set.
                             * @returns {Object} Returns `object`.
                             * @example
                             *
                             * var object = { 'a': [{ 'b': { 'c': 3 } }] };
                             *
                             * _.set(object, 'a[0].b.c', 4);
                             * console.log(object.a[0].b.c);
                             * // => 4
                             *
                             * _.set(object, ['x', '0', 'y', 'z'], 5);
                             * console.log(object.x[0].y.z);
                             * // => 5
                             */
                            function set(object, path, value) {
                                return object == null ? object : baseSet(object, path, value);
                            }

                            /**
                             * This method is like `_.set` except that it accepts `customizer` which is
                             * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
                             * path creation is handled by the method instead. The `customizer` is invoked
                             * with three arguments: (nsValue, key, nsObject).
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Object
                             * @param {Object} object The object to modify.
                             * @param {Array|string} path The path of the property to set.
                             * @param {*} value The value to set.
                             * @param {Function} [customizer] The function to customize assigned values.
                             * @returns {Object} Returns `object`.
                             * @example
                             *
                             * var object = {};
                             *
                             * _.setWith(object, '[0][1]', 'a', Object);
                             * // => { '0': { '1': 'a' } }
                             */
                            function setWith(object, path, value, customizer) {
                                customizer = typeof customizer == 'function' ? customizer : undefined;
                                return object == null ? object : baseSet(object, path, value, customizer);
                            }

                            /**
                             * Creates an array of own enumerable string keyed-value pairs for `object`
                             * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
                             * entries are returned.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @alias entries
                             * @category Object
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the key-value pairs.
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             *   this.b = 2;
                             * }
                             *
                             * Foo.prototype.c = 3;
                             *
                             * _.toPairs(new Foo);
                             * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
                             */
                            var toPairs = createToPairs(keys);

                            /**
                             * Creates an array of own and inherited enumerable string keyed-value pairs
                             * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
                             * or set, its entries are returned.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @alias entriesIn
                             * @category Object
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the key-value pairs.
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             *   this.b = 2;
                             * }
                             *
                             * Foo.prototype.c = 3;
                             *
                             * _.toPairsIn(new Foo);
                             * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
                             */
                            var toPairsIn = createToPairs(keysIn);

                            /**
                             * An alternative to `_.reduce`; this method transforms `object` to a new
                             * `accumulator` object which is the result of running each of its own
                             * enumerable string keyed properties thru `iteratee`, with each invocation
                             * potentially mutating the `accumulator` object. If `accumulator` is not
                             * provided, a new object with the same `[[Prototype]]` will be used. The
                             * iteratee is invoked with four arguments: (accumulator, value, key, object).
                             * Iteratee functions may exit iteration early by explicitly returning `false`.
                             *
                             * @static
                             * @memberOf _
                             * @since 1.3.0
                             * @category Object
                             * @param {Object} object The object to iterate over.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @param {*} [accumulator] The custom accumulator value.
                             * @returns {*} Returns the accumulated value.
                             * @example
                             *
                             * _.transform([2, 3, 4], function(result, n) {
                             *   result.push(n *= n);
                             *   return n % 2 == 0;
                             * }, []);
                             * // => [4, 9]
                             *
                             * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
                             *   (result[value] || (result[value] = [])).push(key);
                             * }, {});
                             * // => { '1': ['a', 'c'], '2': ['b'] }
                             */
                            function transform(object, iteratee, accumulator) {
                                var isArr = isArray(object),
                                    isArrLike = isArr || isBuffer(object) || isTypedArray(object);

                                iteratee = getIteratee(iteratee, 4);
                                if (accumulator == null) {
                                    var Ctor = object && object.constructor;
                                    if (isArrLike) {
                                        accumulator = isArr ? new Ctor : [];
                                    } else if (isObject(object)) {
                                        accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
                                    } else {
                                        accumulator = {};
                                    }
                                }
                                (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {
                                    return iteratee(accumulator, value, index, object);
                                });
                                return accumulator;
                            }

                            /**
                             * Removes the property at `path` of `object`.
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Object
                             * @param {Object} object The object to modify.
                             * @param {Array|string} path The path of the property to unset.
                             * @returns {boolean} Returns `true` if the property is deleted, else `false`.
                             * @example
                             *
                             * var object = { 'a': [{ 'b': { 'c': 7 } }] };
                             * _.unset(object, 'a[0].b.c');
                             * // => true
                             *
                             * console.log(object);
                             * // => { 'a': [{ 'b': {} }] };
                             *
                             * _.unset(object, ['a', '0', 'b', 'c']);
                             * // => true
                             *
                             * console.log(object);
                             * // => { 'a': [{ 'b': {} }] };
                             */
                            function unset(object, path) {
                                return object == null ? true : baseUnset(object, path);
                            }

                            /**
                             * This method is like `_.set` except that accepts `updater` to produce the
                             * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
                             * is invoked with one argument: (value).
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.6.0
                             * @category Object
                             * @param {Object} object The object to modify.
                             * @param {Array|string} path The path of the property to set.
                             * @param {Function} updater The function to produce the updated value.
                             * @returns {Object} Returns `object`.
                             * @example
                             *
                             * var object = { 'a': [{ 'b': { 'c': 3 } }] };
                             *
                             * _.update(object, 'a[0].b.c', function(n) { return n * n; });
                             * console.log(object.a[0].b.c);
                             * // => 9
                             *
                             * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
                             * console.log(object.x[0].y.z);
                             * // => 0
                             */
                            function update(object, path, updater) {
                                return object == null ? object : baseUpdate(object, path, castFunction(updater));
                            }

                            /**
                             * This method is like `_.update` except that it accepts `customizer` which is
                             * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
                             * path creation is handled by the method instead. The `customizer` is invoked
                             * with three arguments: (nsValue, key, nsObject).
                             *
                             * **Note:** This method mutates `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.6.0
                             * @category Object
                             * @param {Object} object The object to modify.
                             * @param {Array|string} path The path of the property to set.
                             * @param {Function} updater The function to produce the updated value.
                             * @param {Function} [customizer] The function to customize assigned values.
                             * @returns {Object} Returns `object`.
                             * @example
                             *
                             * var object = {};
                             *
                             * _.updateWith(object, '[0][1]', _.constant('a'), Object);
                             * // => { '0': { '1': 'a' } }
                             */
                            function updateWith(object, path, updater, customizer) {
                                customizer = typeof customizer == 'function' ? customizer : undefined;
                                return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
                            }

                            /**
                             * Creates an array of the own enumerable string keyed property values of `object`.
                             *
                             * **Note:** Non-object values are coerced to objects.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Object
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the array of property values.
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             *   this.b = 2;
                             * }
                             *
                             * Foo.prototype.c = 3;
                             *
                             * _.values(new Foo);
                             * // => [1, 2] (iteration order is not guaranteed)
                             *
                             * _.values('hi');
                             * // => ['h', 'i']
                             */
                            function values(object) {
                                return object == null ? [] : baseValues(object, keys(object));
                            }

                            /**
                             * Creates an array of the own and inherited enumerable string keyed property
                             * values of `object`.
                             *
                             * **Note:** Non-object values are coerced to objects.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Object
                             * @param {Object} object The object to query.
                             * @returns {Array} Returns the array of property values.
                             * @example
                             *
                             * function Foo() {
                             *   this.a = 1;
                             *   this.b = 2;
                             * }
                             *
                             * Foo.prototype.c = 3;
                             *
                             * _.valuesIn(new Foo);
                             * // => [1, 2, 3] (iteration order is not guaranteed)
                             */
                            function valuesIn(object) {
                                return object == null ? [] : baseValues(object, keysIn(object));
                            }

                            /*------------------------------------------------------------------------*/

                            /**
                             * Clamps `number` within the inclusive `lower` and `upper` bounds.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Number
                             * @param {number} number The number to clamp.
                             * @param {number} [lower] The lower bound.
                             * @param {number} upper The upper bound.
                             * @returns {number} Returns the clamped number.
                             * @example
                             *
                             * _.clamp(-10, -5, 5);
                             * // => -5
                             *
                             * _.clamp(10, -5, 5);
                             * // => 5
                             */
                            function clamp(number, lower, upper) {
                                if (upper === undefined) {
                                    upper = lower;
                                    lower = undefined;
                                }
                                if (upper !== undefined) {
                                    upper = toNumber(upper);
                                    upper = upper === upper ? upper : 0;
                                }
                                if (lower !== undefined) {
                                    lower = toNumber(lower);
                                    lower = lower === lower ? lower : 0;
                                }
                                return baseClamp(toNumber(number), lower, upper);
                            }

                            /**
                             * Checks if `n` is between `start` and up to, but not including, `end`. If
                             * `end` is not specified, it's set to `start` with `start` then set to `0`.
                             * If `start` is greater than `end` the params are swapped to support
                             * negative ranges.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.3.0
                             * @category Number
                             * @param {number} number The number to check.
                             * @param {number} [start=0] The start of the range.
                             * @param {number} end The end of the range.
                             * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
                             * @see _.range, _.rangeRight
                             * @example
                             *
                             * _.inRange(3, 2, 4);
                             * // => true
                             *
                             * _.inRange(4, 8);
                             * // => true
                             *
                             * _.inRange(4, 2);
                             * // => false
                             *
                             * _.inRange(2, 2);
                             * // => false
                             *
                             * _.inRange(1.2, 2);
                             * // => true
                             *
                             * _.inRange(5.2, 4);
                             * // => false
                             *
                             * _.inRange(-3, -2, -6);
                             * // => true
                             */
                            function inRange(number, start, end) {
                                start = toFinite(start);
                                if (end === undefined) {
                                    end = start;
                                    start = 0;
                                } else {
                                    end = toFinite(end);
                                }
                                number = toNumber(number);
                                return baseInRange(number, start, end);
                            }

                            /**
                             * Produces a random number between the inclusive `lower` and `upper` bounds.
                             * If only one argument is provided a number between `0` and the given number
                             * is returned. If `floating` is `true`, or either `lower` or `upper` are
                             * floats, a floating-point number is returned instead of an integer.
                             *
                             * **Note:** JavaScript follows the IEEE-754 standard for resolving
                             * floating-point values which can produce unexpected results.
                             *
                             * @static
                             * @memberOf _
                             * @since 0.7.0
                             * @category Number
                             * @param {number} [lower=0] The lower bound.
                             * @param {number} [upper=1] The upper bound.
                             * @param {boolean} [floating] Specify returning a floating-point number.
                             * @returns {number} Returns the random number.
                             * @example
                             *
                             * _.random(0, 5);
                             * // => an integer between 0 and 5
                             *
                             * _.random(5);
                             * // => also an integer between 0 and 5
                             *
                             * _.random(5, true);
                             * // => a floating-point number between 0 and 5
                             *
                             * _.random(1.2, 5.2);
                             * // => a floating-point number between 1.2 and 5.2
                             */
                            function random(lower, upper, floating) {
                                if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
                                    upper = floating = undefined;
                                }
                                if (floating === undefined) {
                                    if (typeof upper == 'boolean') {
                                        floating = upper;
                                        upper = undefined;
                                    } else if (typeof lower == 'boolean') {
                                        floating = lower;
                                        lower = undefined;
                                    }
                                }
                                if (lower === undefined && upper === undefined) {
                                    lower = 0;
                                    upper = 1;
                                } else {
                                    lower = toFinite(lower);
                                    if (upper === undefined) {
                                        upper = lower;
                                        lower = 0;
                                    } else {
                                        upper = toFinite(upper);
                                    }
                                }
                                if (lower > upper) {
                                    var temp = lower;
                                    lower = upper;
                                    upper = temp;
                                }
                                if (floating || lower % 1 || upper % 1) {
                                    var rand = nativeRandom();
                                    return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
                                }
                                return baseRandom(lower, upper);
                            }

                            /*------------------------------------------------------------------------*/

                            /**
                             * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to convert.
                             * @returns {string} Returns the camel cased string.
                             * @example
                             *
                             * _.camelCase('Foo Bar');
                             * // => 'fooBar'
                             *
                             * _.camelCase('--foo-bar--');
                             * // => 'fooBar'
                             *
                             * _.camelCase('__FOO_BAR__');
                             * // => 'fooBar'
                             */
                            var camelCase = createCompounder(function(result, word, index) {
                                word = word.toLowerCase();
                                return result + (index ? capitalize(word) : word);
                            });

                            /**
                             * Converts the first character of `string` to upper case and the remaining
                             * to lower case.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to capitalize.
                             * @returns {string} Returns the capitalized string.
                             * @example
                             *
                             * _.capitalize('FRED');
                             * // => 'Fred'
                             */
                            function capitalize(string) {
                                return upperFirst(toString(string).toLowerCase());
                            }

                            /**
                             * Deburrs `string` by converting
                             * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
                             * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
                             * letters to basic Latin letters and removing
                             * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to deburr.
                             * @returns {string} Returns the deburred string.
                             * @example
                             *
                             * _.deburr('déjà vu');
                             * // => 'deja vu'
                             */
                            function deburr(string) {
                                string = toString(string);
                                return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
                            }

                            /**
                             * Checks if `string` ends with the given target string.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to inspect.
                             * @param {string} [target] The string to search for.
                             * @param {number} [position=string.length] The position to search up to.
                             * @returns {boolean} Returns `true` if `string` ends with `target`,
                             *  else `false`.
                             * @example
                             *
                             * _.endsWith('abc', 'c');
                             * // => true
                             *
                             * _.endsWith('abc', 'b');
                             * // => false
                             *
                             * _.endsWith('abc', 'b', 2);
                             * // => true
                             */
                            function endsWith(string, target, position) {
                                string = toString(string);
                                target = baseToString(target);

                                var length = string.length;
                                position = position === undefined ?
                                    length :
                                    baseClamp(toInteger(position), 0, length);

                                var end = position;
                                position -= target.length;
                                return position >= 0 && string.slice(position, end) == target;
                            }

                            /**
                             * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
                             * corresponding HTML entities.
                             *
                             * **Note:** No other characters are escaped. To escape additional
                             * characters use a third-party library like [_he_](https://mths.be/he).
                             *
                             * Though the ">" character is escaped for symmetry, characters like
                             * ">" and "/" don't need escaping in HTML and have no special meaning
                             * unless they're part of a tag or unquoted attribute value. See
                             * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
                             * (under "semi-related fun fact") for more details.
                             *
                             * When working with HTML you should always
                             * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
                             * XSS vectors.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category String
                             * @param {string} [string=''] The string to escape.
                             * @returns {string} Returns the escaped string.
                             * @example
                             *
                             * _.escape('fred, barney, & pebbles');
                             * // => 'fred, barney, &amp; pebbles'
                             */
                            function escape(string) {
                                string = toString(string);
                                return (string && reHasUnescapedHtml.test(string)) ?
                                    string.replace(reUnescapedHtml, escapeHtmlChar) :
                                    string;
                            }

                            /**
                             * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
                             * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to escape.
                             * @returns {string} Returns the escaped string.
                             * @example
                             *
                             * _.escapeRegExp('[lodash](https://lodash.com/)');
                             * // => '\[lodash\]\(https://lodash\.com/\)'
                             */
                            function escapeRegExp(string) {
                                string = toString(string);
                                return (string && reHasRegExpChar.test(string)) ?
                                    string.replace(reRegExpChar, '\\$&') :
                                    string;
                            }

                            /**
                             * Converts `string` to
                             * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to convert.
                             * @returns {string} Returns the kebab cased string.
                             * @example
                             *
                             * _.kebabCase('Foo Bar');
                             * // => 'foo-bar'
                             *
                             * _.kebabCase('fooBar');
                             * // => 'foo-bar'
                             *
                             * _.kebabCase('__FOO_BAR__');
                             * // => 'foo-bar'
                             */
                            var kebabCase = createCompounder(function(result, word, index) {
                                return result + (index ? '-' : '') + word.toLowerCase();
                            });

                            /**
                             * Converts `string`, as space separated words, to lower case.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to convert.
                             * @returns {string} Returns the lower cased string.
                             * @example
                             *
                             * _.lowerCase('--Foo-Bar--');
                             * // => 'foo bar'
                             *
                             * _.lowerCase('fooBar');
                             * // => 'foo bar'
                             *
                             * _.lowerCase('__FOO_BAR__');
                             * // => 'foo bar'
                             */
                            var lowerCase = createCompounder(function(result, word, index) {
                                return result + (index ? ' ' : '') + word.toLowerCase();
                            });

                            /**
                             * Converts the first character of `string` to lower case.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to convert.
                             * @returns {string} Returns the converted string.
                             * @example
                             *
                             * _.lowerFirst('Fred');
                             * // => 'fred'
                             *
                             * _.lowerFirst('FRED');
                             * // => 'fRED'
                             */
                            var lowerFirst = createCaseFirst('toLowerCase');

                            /**
                             * Pads `string` on the left and right sides if it's shorter than `length`.
                             * Padding characters are truncated if they can't be evenly divided by `length`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to pad.
                             * @param {number} [length=0] The padding length.
                             * @param {string} [chars=' '] The string used as padding.
                             * @returns {string} Returns the padded string.
                             * @example
                             *
                             * _.pad('abc', 8);
                             * // => '  abc   '
                             *
                             * _.pad('abc', 8, '_-');
                             * // => '_-abc_-_'
                             *
                             * _.pad('abc', 3);
                             * // => 'abc'
                             */
                            function pad(string, length, chars) {
                                string = toString(string);
                                length = toInteger(length);

                                var strLength = length ? stringSize(string) : 0;
                                if (!length || strLength >= length) {
                                    return string;
                                }
                                var mid = (length - strLength) / 2;
                                return (
                                    createPadding(nativeFloor(mid), chars) +
                                    string +
                                    createPadding(nativeCeil(mid), chars)
                                );
                            }

                            /**
                             * Pads `string` on the right side if it's shorter than `length`. Padding
                             * characters are truncated if they exceed `length`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to pad.
                             * @param {number} [length=0] The padding length.
                             * @param {string} [chars=' '] The string used as padding.
                             * @returns {string} Returns the padded string.
                             * @example
                             *
                             * _.padEnd('abc', 6);
                             * // => 'abc   '
                             *
                             * _.padEnd('abc', 6, '_-');
                             * // => 'abc_-_'
                             *
                             * _.padEnd('abc', 3);
                             * // => 'abc'
                             */
                            function padEnd(string, length, chars) {
                                string = toString(string);
                                length = toInteger(length);

                                var strLength = length ? stringSize(string) : 0;
                                return (length && strLength < length) ?
                                    (string + createPadding(length - strLength, chars)) :
                                    string;
                            }

                            /**
                             * Pads `string` on the left side if it's shorter than `length`. Padding
                             * characters are truncated if they exceed `length`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to pad.
                             * @param {number} [length=0] The padding length.
                             * @param {string} [chars=' '] The string used as padding.
                             * @returns {string} Returns the padded string.
                             * @example
                             *
                             * _.padStart('abc', 6);
                             * // => '   abc'
                             *
                             * _.padStart('abc', 6, '_-');
                             * // => '_-_abc'
                             *
                             * _.padStart('abc', 3);
                             * // => 'abc'
                             */
                            function padStart(string, length, chars) {
                                string = toString(string);
                                length = toInteger(length);

                                var strLength = length ? stringSize(string) : 0;
                                return (length && strLength < length) ?
                                    (createPadding(length - strLength, chars) + string) :
                                    string;
                            }

                            /**
                             * Converts `string` to an integer of the specified radix. If `radix` is
                             * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
                             * hexadecimal, in which case a `radix` of `16` is used.
                             *
                             * **Note:** This method aligns with the
                             * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
                             *
                             * @static
                             * @memberOf _
                             * @since 1.1.0
                             * @category String
                             * @param {string} string The string to convert.
                             * @param {number} [radix=10] The radix to interpret `value` by.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {number} Returns the converted integer.
                             * @example
                             *
                             * _.parseInt('08');
                             * // => 8
                             *
                             * _.map(['6', '08', '10'], _.parseInt);
                             * // => [6, 8, 10]
                             */
                            function parseInt(string, radix, guard) {
                                if (guard || radix == null) {
                                    radix = 0;
                                } else if (radix) {
                                    radix = +radix;
                                }
                                return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
                            }

                            /**
                             * Repeats the given string `n` times.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to repeat.
                             * @param {number} [n=1] The number of times to repeat the string.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {string} Returns the repeated string.
                             * @example
                             *
                             * _.repeat('*', 3);
                             * // => '***'
                             *
                             * _.repeat('abc', 2);
                             * // => 'abcabc'
                             *
                             * _.repeat('abc', 0);
                             * // => ''
                             */
                            function repeat(string, n, guard) {
                                if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {
                                    n = 1;
                                } else {
                                    n = toInteger(n);
                                }
                                return baseRepeat(toString(string), n);
                            }

                            /**
                             * Replaces matches for `pattern` in `string` with `replacement`.
                             *
                             * **Note:** This method is based on
                             * [`String#replace`](https://mdn.io/String/replace).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to modify.
                             * @param {RegExp|string} pattern The pattern to replace.
                             * @param {Function|string} replacement The match replacement.
                             * @returns {string} Returns the modified string.
                             * @example
                             *
                             * _.replace('Hi Fred', 'Fred', 'Barney');
                             * // => 'Hi Barney'
                             */
                            function replace() {
                                var args = arguments,
                                    string = toString(args[0]);

                                return args.length < 3 ? string : string.replace(args[1], args[2]);
                            }

                            /**
                             * Converts `string` to
                             * [snake case](https://en.wikipedia.org/wiki/Snake_case).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to convert.
                             * @returns {string} Returns the snake cased string.
                             * @example
                             *
                             * _.snakeCase('Foo Bar');
                             * // => 'foo_bar'
                             *
                             * _.snakeCase('fooBar');
                             * // => 'foo_bar'
                             *
                             * _.snakeCase('--FOO-BAR--');
                             * // => 'foo_bar'
                             */
                            var snakeCase = createCompounder(function(result, word, index) {
                                return result + (index ? '_' : '') + word.toLowerCase();
                            });

                            /**
                             * Splits `string` by `separator`.
                             *
                             * **Note:** This method is based on
                             * [`String#split`](https://mdn.io/String/split).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to split.
                             * @param {RegExp|string} separator The separator pattern to split by.
                             * @param {number} [limit] The length to truncate results to.
                             * @returns {Array} Returns the string segments.
                             * @example
                             *
                             * _.split('a-b-c', '-', 2);
                             * // => ['a', 'b']
                             */
                            function split(string, separator, limit) {
                                if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
                                    separator = limit = undefined;
                                }
                                limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
                                if (!limit) {
                                    return [];
                                }
                                string = toString(string);
                                if (string && (
                                        typeof separator == 'string' ||
                                        (separator != null && !isRegExp(separator))
                                    )) {
                                    separator = baseToString(separator);
                                    if (!separator && hasUnicode(string)) {
                                        return castSlice(stringToArray(string), 0, limit);
                                    }
                                }
                                return string.split(separator, limit);
                            }

                            /**
                             * Converts `string` to
                             * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
                             *
                             * @static
                             * @memberOf _
                             * @since 3.1.0
                             * @category String
                             * @param {string} [string=''] The string to convert.
                             * @returns {string} Returns the start cased string.
                             * @example
                             *
                             * _.startCase('--foo-bar--');
                             * // => 'Foo Bar'
                             *
                             * _.startCase('fooBar');
                             * // => 'Foo Bar'
                             *
                             * _.startCase('__FOO_BAR__');
                             * // => 'FOO BAR'
                             */
                            var startCase = createCompounder(function(result, word, index) {
                                return result + (index ? ' ' : '') + upperFirst(word);
                            });

                            /**
                             * Checks if `string` starts with the given target string.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to inspect.
                             * @param {string} [target] The string to search for.
                             * @param {number} [position=0] The position to search from.
                             * @returns {boolean} Returns `true` if `string` starts with `target`,
                             *  else `false`.
                             * @example
                             *
                             * _.startsWith('abc', 'a');
                             * // => true
                             *
                             * _.startsWith('abc', 'b');
                             * // => false
                             *
                             * _.startsWith('abc', 'b', 1);
                             * // => true
                             */
                            function startsWith(string, target, position) {
                                string = toString(string);
                                position = position == null ?
                                    0 :
                                    baseClamp(toInteger(position), 0, string.length);

                                target = baseToString(target);
                                return string.slice(position, position + target.length) == target;
                            }

                            /**
                             * Creates a compiled template function that can interpolate data properties
                             * in "interpolate" delimiters, HTML-escape interpolated data properties in
                             * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
                             * properties may be accessed as free variables in the template. If a setting
                             * object is given, it takes precedence over `_.templateSettings` values.
                             *
                             * **Note:** In the development build `_.template` utilizes
                             * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
                             * for easier debugging.
                             *
                             * For more information on precompiling templates see
                             * [lodash's custom builds documentation](https://lodash.com/custom-builds).
                             *
                             * For more information on Chrome extension sandboxes see
                             * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category String
                             * @param {string} [string=''] The template string.
                             * @param {Object} [options={}] The options object.
                             * @param {RegExp} [options.escape=_.templateSettings.escape]
                             *  The HTML "escape" delimiter.
                             * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
                             *  The "evaluate" delimiter.
                             * @param {Object} [options.imports=_.templateSettings.imports]
                             *  An object to import into the template as free variables.
                             * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
                             *  The "interpolate" delimiter.
                             * @param {string} [options.sourceURL='lodash.templateSources[n]']
                             *  The sourceURL of the compiled template.
                             * @param {string} [options.variable='obj']
                             *  The data object variable name.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {Function} Returns the compiled template function.
                             * @example
                             *
                             * // Use the "interpolate" delimiter to create a compiled template.
                             * var compiled = _.template('hello <%= user %>!');
                             * compiled({ 'user': 'fred' });
                             * // => 'hello fred!'
                             *
                             * // Use the HTML "escape" delimiter to escape data property values.
                             * var compiled = _.template('<b><%- value %></b>');
                             * compiled({ 'value': '<script>' });
                             * // => '<b>&lt;script&gt;</b>'
                             *
                             * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
                             * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
                             * compiled({ 'users': ['fred', 'barney'] });
                             * // => '<li>fred</li><li>barney</li>'
                             *
                             * // Use the internal `print` function in "evaluate" delimiters.
                             * var compiled = _.template('<% print("hello " + user); %>!');
                             * compiled({ 'user': 'barney' });
                             * // => 'hello barney!'
                             *
                             * // Use the ES template literal delimiter as an "interpolate" delimiter.
                             * // Disable support by replacing the "interpolate" delimiter.
                             * var compiled = _.template('hello ${ user }!');
                             * compiled({ 'user': 'pebbles' });
                             * // => 'hello pebbles!'
                             *
                             * // Use backslashes to treat delimiters as plain text.
                             * var compiled = _.template('<%= "\\<%- value %\\>" %>');
                             * compiled({ 'value': 'ignored' });
                             * // => '<%- value %>'
                             *
                             * // Use the `imports` option to import `jQuery` as `jq`.
                             * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
                             * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
                             * compiled({ 'users': ['fred', 'barney'] });
                             * // => '<li>fred</li><li>barney</li>'
                             *
                             * // Use the `sourceURL` option to specify a custom sourceURL for the template.
                             * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
                             * compiled(data);
                             * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
                             *
                             * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
                             * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
                             * compiled.source;
                             * // => function(data) {
                             * //   var __t, __p = '';
                             * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
                             * //   return __p;
                             * // }
                             *
                             * // Use custom template delimiters.
                             * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
                             * var compiled = _.template('hello {{ user }}!');
                             * compiled({ 'user': 'mustache' });
                             * // => 'hello mustache!'
                             *
                             * // Use the `source` property to inline compiled templates for meaningful
                             * // line numbers in error messages and stack traces.
                             * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
                             *   var JST = {\
                             *     "main": ' + _.template(mainText).source + '\
                             *   };\
                             * ');
                             */
                            function template(string, options, guard) {
                                // Based on John Resig's `tmpl` implementation
                                // (http://ejohn.org/blog/javascript-micro-templating/)
                                // and Laura Doktorova's doT.js (https://github.com/olado/doT).
                                var settings = lodash.templateSettings;

                                if (guard && isIterateeCall(string, options, guard)) {
                                    options = undefined;
                                }
                                string = toString(string);
                                options = assignInWith({}, options, settings, customDefaultsAssignIn);

                                var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
                                    importsKeys = keys(imports),
                                    importsValues = baseValues(imports, importsKeys);

                                var isEscaping,
                                    isEvaluating,
                                    index = 0,
                                    interpolate = options.interpolate || reNoMatch,
                                    source = "__p += '";

                                // Compile the regexp to match each delimiter.
                                var reDelimiters = RegExp(
                                    (options.escape || reNoMatch).source + '|' +
                                    interpolate.source + '|' +
                                    (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
                                    (options.evaluate || reNoMatch).source + '|$', 'g');

                                // Use a sourceURL for easier debugging.
                                var sourceURL = '//# sourceURL=' +
                                    ('sourceURL' in options ?
                                        options.sourceURL :
                                        ('lodash.templateSources[' + (++templateCounter) + ']')
                                    ) + '\n';

                                string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
                                    interpolateValue || (interpolateValue = esTemplateValue);

                                    // Escape characters that can't be included in string literals.
                                    source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);

                                    // Replace delimiters with snippets.
                                    if (escapeValue) {
                                        isEscaping = true;
                                        source += "' +\n__e(" + escapeValue + ") +\n'";
                                    }
                                    if (evaluateValue) {
                                        isEvaluating = true;
                                        source += "';\n" + evaluateValue + ";\n__p += '";
                                    }
                                    if (interpolateValue) {
                                        source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
                                    }
                                    index = offset + match.length;

                                    // The JS engine embedded in Adobe products needs `match` returned in
                                    // order to produce the correct `offset` value.
                                    return match;
                                });

                                source += "';\n";

                                // If `variable` is not specified wrap a with-statement around the generated
                                // code to add the data object to the top of the scope chain.
                                var variable = options.variable;
                                if (!variable) {
                                    source = 'with (obj) {\n' + source + '\n}\n';
                                }
                                // Cleanup code by stripping empty strings.
                                source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
                                    .replace(reEmptyStringMiddle, '$1')
                                    .replace(reEmptyStringTrailing, '$1;');

                                // Frame code as the function body.
                                source = 'function(' + (variable || 'obj') + ') {\n' +
                                    (variable ?
                                        '' :
                                        'obj || (obj = {});\n'
                                    ) +
                                    "var __t, __p = ''" +
                                    (isEscaping ?
                                        ', __e = _.escape' :
                                        ''
                                    ) +
                                    (isEvaluating ?
                                        ', __j = Array.prototype.join;\n' +
                                        "function print() { __p += __j.call(arguments, '') }\n" :
                                        ';\n'
                                    ) +
                                    source +
                                    'return __p\n}';

                                var result = attempt(function() {
                                    return Function(importsKeys, sourceURL + 'return ' + source)
                                        .apply(undefined, importsValues);
                                });

                                // Provide the compiled function's source by its `toString` method or
                                // the `source` property as a convenience for inlining compiled templates.
                                result.source = source;
                                if (isError(result)) {
                                    throw result;
                                }
                                return result;
                            }

                            /**
                             * Converts `string`, as a whole, to lower case just like
                             * [String#toLowerCase](https://mdn.io/toLowerCase).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to convert.
                             * @returns {string} Returns the lower cased string.
                             * @example
                             *
                             * _.toLower('--Foo-Bar--');
                             * // => '--foo-bar--'
                             *
                             * _.toLower('fooBar');
                             * // => 'foobar'
                             *
                             * _.toLower('__FOO_BAR__');
                             * // => '__foo_bar__'
                             */
                            function toLower(value) {
                                return toString(value).toLowerCase();
                            }

                            /**
                             * Converts `string`, as a whole, to upper case just like
                             * [String#toUpperCase](https://mdn.io/toUpperCase).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to convert.
                             * @returns {string} Returns the upper cased string.
                             * @example
                             *
                             * _.toUpper('--foo-bar--');
                             * // => '--FOO-BAR--'
                             *
                             * _.toUpper('fooBar');
                             * // => 'FOOBAR'
                             *
                             * _.toUpper('__foo_bar__');
                             * // => '__FOO_BAR__'
                             */
                            function toUpper(value) {
                                return toString(value).toUpperCase();
                            }

                            /**
                             * Removes leading and trailing whitespace or specified characters from `string`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to trim.
                             * @param {string} [chars=whitespace] The characters to trim.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {string} Returns the trimmed string.
                             * @example
                             *
                             * _.trim('  abc  ');
                             * // => 'abc'
                             *
                             * _.trim('-_-abc-_-', '_-');
                             * // => 'abc'
                             *
                             * _.map(['  foo  ', '  bar  '], _.trim);
                             * // => ['foo', 'bar']
                             */
                            function trim(string, chars, guard) {
                                string = toString(string);
                                if (string && (guard || chars === undefined)) {
                                    return string.replace(reTrim, '');
                                }
                                if (!string || !(chars = baseToString(chars))) {
                                    return string;
                                }
                                var strSymbols = stringToArray(string),
                                    chrSymbols = stringToArray(chars),
                                    start = charsStartIndex(strSymbols, chrSymbols),
                                    end = charsEndIndex(strSymbols, chrSymbols) + 1;

                                return castSlice(strSymbols, start, end).join('');
                            }

                            /**
                             * Removes trailing whitespace or specified characters from `string`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to trim.
                             * @param {string} [chars=whitespace] The characters to trim.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {string} Returns the trimmed string.
                             * @example
                             *
                             * _.trimEnd('  abc  ');
                             * // => '  abc'
                             *
                             * _.trimEnd('-_-abc-_-', '_-');
                             * // => '-_-abc'
                             */
                            function trimEnd(string, chars, guard) {
                                string = toString(string);
                                if (string && (guard || chars === undefined)) {
                                    return string.replace(reTrimEnd, '');
                                }
                                if (!string || !(chars = baseToString(chars))) {
                                    return string;
                                }
                                var strSymbols = stringToArray(string),
                                    end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;

                                return castSlice(strSymbols, 0, end).join('');
                            }

                            /**
                             * Removes leading whitespace or specified characters from `string`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to trim.
                             * @param {string} [chars=whitespace] The characters to trim.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {string} Returns the trimmed string.
                             * @example
                             *
                             * _.trimStart('  abc  ');
                             * // => 'abc  '
                             *
                             * _.trimStart('-_-abc-_-', '_-');
                             * // => 'abc-_-'
                             */
                            function trimStart(string, chars, guard) {
                                string = toString(string);
                                if (string && (guard || chars === undefined)) {
                                    return string.replace(reTrimStart, '');
                                }
                                if (!string || !(chars = baseToString(chars))) {
                                    return string;
                                }
                                var strSymbols = stringToArray(string),
                                    start = charsStartIndex(strSymbols, stringToArray(chars));

                                return castSlice(strSymbols, start).join('');
                            }

                            /**
                             * Truncates `string` if it's longer than the given maximum string length.
                             * The last characters of the truncated string are replaced with the omission
                             * string which defaults to "...".
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to truncate.
                             * @param {Object} [options={}] The options object.
                             * @param {number} [options.length=30] The maximum string length.
                             * @param {string} [options.omission='...'] The string to indicate text is omitted.
                             * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
                             * @returns {string} Returns the truncated string.
                             * @example
                             *
                             * _.truncate('hi-diddly-ho there, neighborino');
                             * // => 'hi-diddly-ho there, neighbo...'
                             *
                             * _.truncate('hi-diddly-ho there, neighborino', {
                             *   'length': 24,
                             *   'separator': ' '
                             * });
                             * // => 'hi-diddly-ho there,...'
                             *
                             * _.truncate('hi-diddly-ho there, neighborino', {
                             *   'length': 24,
                             *   'separator': /,? +/
                             * });
                             * // => 'hi-diddly-ho there...'
                             *
                             * _.truncate('hi-diddly-ho there, neighborino', {
                             *   'omission': ' [...]'
                             * });
                             * // => 'hi-diddly-ho there, neig [...]'
                             */
                            function truncate(string, options) {
                                var length = DEFAULT_TRUNC_LENGTH,
                                    omission = DEFAULT_TRUNC_OMISSION;

                                if (isObject(options)) {
                                    var separator = 'separator' in options ? options.separator : separator;
                                    length = 'length' in options ? toInteger(options.length) : length;
                                    omission = 'omission' in options ? baseToString(options.omission) : omission;
                                }
                                string = toString(string);

                                var strLength = string.length;
                                if (hasUnicode(string)) {
                                    var strSymbols = stringToArray(string);
                                    strLength = strSymbols.length;
                                }
                                if (length >= strLength) {
                                    return string;
                                }
                                var end = length - stringSize(omission);
                                if (end < 1) {
                                    return omission;
                                }
                                var result = strSymbols ?
                                    castSlice(strSymbols, 0, end).join('') :
                                    string.slice(0, end);

                                if (separator === undefined) {
                                    return result + omission;
                                }
                                if (strSymbols) {
                                    end += (result.length - end);
                                }
                                if (isRegExp(separator)) {
                                    if (string.slice(end).search(separator)) {
                                        var match,
                                            substring = result;

                                        if (!separator.global) {
                                            separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
                                        }
                                        separator.lastIndex = 0;
                                        while ((match = separator.exec(substring))) {
                                            var newEnd = match.index;
                                        }
                                        result = result.slice(0, newEnd === undefined ? end : newEnd);
                                    }
                                } else if (string.indexOf(baseToString(separator), end) != end) {
                                    var index = result.lastIndexOf(separator);
                                    if (index > -1) {
                                        result = result.slice(0, index);
                                    }
                                }
                                return result + omission;
                            }

                            /**
                             * The inverse of `_.escape`; this method converts the HTML entities
                             * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
                             * their corresponding characters.
                             *
                             * **Note:** No other HTML entities are unescaped. To unescape additional
                             * HTML entities use a third-party library like [_he_](https://mths.be/he).
                             *
                             * @static
                             * @memberOf _
                             * @since 0.6.0
                             * @category String
                             * @param {string} [string=''] The string to unescape.
                             * @returns {string} Returns the unescaped string.
                             * @example
                             *
                             * _.unescape('fred, barney, &amp; pebbles');
                             * // => 'fred, barney, & pebbles'
                             */
                            function unescape(string) {
                                string = toString(string);
                                return (string && reHasEscapedHtml.test(string)) ?
                                    string.replace(reEscapedHtml, unescapeHtmlChar) :
                                    string;
                            }

                            /**
                             * Converts `string`, as space separated words, to upper case.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to convert.
                             * @returns {string} Returns the upper cased string.
                             * @example
                             *
                             * _.upperCase('--foo-bar');
                             * // => 'FOO BAR'
                             *
                             * _.upperCase('fooBar');
                             * // => 'FOO BAR'
                             *
                             * _.upperCase('__foo_bar__');
                             * // => 'FOO BAR'
                             */
                            var upperCase = createCompounder(function(result, word, index) {
                                return result + (index ? ' ' : '') + word.toUpperCase();
                            });

                            /**
                             * Converts the first character of `string` to upper case.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category String
                             * @param {string} [string=''] The string to convert.
                             * @returns {string} Returns the converted string.
                             * @example
                             *
                             * _.upperFirst('fred');
                             * // => 'Fred'
                             *
                             * _.upperFirst('FRED');
                             * // => 'FRED'
                             */
                            var upperFirst = createCaseFirst('toUpperCase');

                            /**
                             * Splits `string` into an array of its words.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category String
                             * @param {string} [string=''] The string to inspect.
                             * @param {RegExp|string} [pattern] The pattern to match words.
                             * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
                             * @returns {Array} Returns the words of `string`.
                             * @example
                             *
                             * _.words('fred, barney, & pebbles');
                             * // => ['fred', 'barney', 'pebbles']
                             *
                             * _.words('fred, barney, & pebbles', /[^, ]+/g);
                             * // => ['fred', 'barney', '&', 'pebbles']
                             */
                            function words(string, pattern, guard) {
                                string = toString(string);
                                pattern = guard ? undefined : pattern;

                                if (pattern === undefined) {
                                    return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
                                }
                                return string.match(pattern) || [];
                            }

                            /*------------------------------------------------------------------------*/

                            /**
                             * Attempts to invoke `func`, returning either the result or the caught error
                             * object. Any additional arguments are provided to `func` when it's invoked.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Util
                             * @param {Function} func The function to attempt.
                             * @param {...*} [args] The arguments to invoke `func` with.
                             * @returns {*} Returns the `func` result or error object.
                             * @example
                             *
                             * // Avoid throwing errors for invalid selectors.
                             * var elements = _.attempt(function(selector) {
                             *   return document.querySelectorAll(selector);
                             * }, '>_>');
                             *
                             * if (_.isError(elements)) {
                             *   elements = [];
                             * }
                             */
                            var attempt = baseRest(function(func, args) {
                                try {
                                    return apply(func, undefined, args);
                                } catch (e) {
                                    return isError(e) ? e : new Error(e);
                                }
                            });

                            /**
                             * Binds methods of an object to the object itself, overwriting the existing
                             * method.
                             *
                             * **Note:** This method doesn't set the "length" property of bound functions.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Util
                             * @param {Object} object The object to bind and assign the bound methods to.
                             * @param {...(string|string[])} methodNames The object method names to bind.
                             * @returns {Object} Returns `object`.
                             * @example
                             *
                             * var view = {
                             *   'label': 'docs',
                             *   'click': function() {
                             *     console.log('clicked ' + this.label);
                             *   }
                             * };
                             *
                             * _.bindAll(view, ['click']);
                             * jQuery(element).on('click', view.click);
                             * // => Logs 'clicked docs' when clicked.
                             */
                            var bindAll = flatRest(function(object, methodNames) {
                                arrayEach(methodNames, function(key) {
                                    key = toKey(key);
                                    baseAssignValue(object, key, bind(object[key], object));
                                });
                                return object;
                            });

                            /**
                             * Creates a function that iterates over `pairs` and invokes the corresponding
                             * function of the first predicate to return truthy. The predicate-function
                             * pairs are invoked with the `this` binding and arguments of the created
                             * function.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Util
                             * @param {Array} pairs The predicate-function pairs.
                             * @returns {Function} Returns the new composite function.
                             * @example
                             *
                             * var func = _.cond([
                             *   [_.matches({ 'a': 1 }),           _.constant('matches A')],
                             *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
                             *   [_.stubTrue,                      _.constant('no match')]
                             * ]);
                             *
                             * func({ 'a': 1, 'b': 2 });
                             * // => 'matches A'
                             *
                             * func({ 'a': 0, 'b': 1 });
                             * // => 'matches B'
                             *
                             * func({ 'a': '1', 'b': '2' });
                             * // => 'no match'
                             */
                            function cond(pairs) {
                                var length = pairs == null ? 0 : pairs.length,
                                    toIteratee = getIteratee();

                                pairs = !length ? [] : arrayMap(pairs, function(pair) {
                                    if (typeof pair[1] != 'function') {
                                        throw new TypeError(FUNC_ERROR_TEXT);
                                    }
                                    return [toIteratee(pair[0]), pair[1]];
                                });

                                return baseRest(function(args) {
                                    var index = -1;
                                    while (++index < length) {
                                        var pair = pairs[index];
                                        if (apply(pair[0], this, args)) {
                                            return apply(pair[1], this, args);
                                        }
                                    }
                                });
                            }

                            /**
                             * Creates a function that invokes the predicate properties of `source` with
                             * the corresponding property values of a given object, returning `true` if
                             * all predicates return truthy, else `false`.
                             *
                             * **Note:** The created function is equivalent to `_.conformsTo` with
                             * `source` partially applied.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Util
                             * @param {Object} source The object of property predicates to conform to.
                             * @returns {Function} Returns the new spec function.
                             * @example
                             *
                             * var objects = [
                             *   { 'a': 2, 'b': 1 },
                             *   { 'a': 1, 'b': 2 }
                             * ];
                             *
                             * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
                             * // => [{ 'a': 1, 'b': 2 }]
                             */
                            function conforms(source) {
                                return baseConforms(baseClone(source, CLONE_DEEP_FLAG));
                            }

                            /**
                             * Creates a function that returns `value`.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.4.0
                             * @category Util
                             * @param {*} value The value to return from the new function.
                             * @returns {Function} Returns the new constant function.
                             * @example
                             *
                             * var objects = _.times(2, _.constant({ 'a': 1 }));
                             *
                             * console.log(objects);
                             * // => [{ 'a': 1 }, { 'a': 1 }]
                             *
                             * console.log(objects[0] === objects[1]);
                             * // => true
                             */
                            function constant(value) {
                                return function() {
                                    return value;
                                };
                            }

                            /**
                             * Checks `value` to determine whether a default value should be returned in
                             * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
                             * or `undefined`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.14.0
                             * @category Util
                             * @param {*} value The value to check.
                             * @param {*} defaultValue The default value.
                             * @returns {*} Returns the resolved value.
                             * @example
                             *
                             * _.defaultTo(1, 10);
                             * // => 1
                             *
                             * _.defaultTo(undefined, 10);
                             * // => 10
                             */
                            function defaultTo(value, defaultValue) {
                                return (value == null || value !== value) ? defaultValue : value;
                            }

                            /**
                             * Creates a function that returns the result of invoking the given functions
                             * with the `this` binding of the created function, where each successive
                             * invocation is supplied the return value of the previous.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Util
                             * @param {...(Function|Function[])} [funcs] The functions to invoke.
                             * @returns {Function} Returns the new composite function.
                             * @see _.flowRight
                             * @example
                             *
                             * function square(n) {
                             *   return n * n;
                             * }
                             *
                             * var addSquare = _.flow([_.add, square]);
                             * addSquare(1, 2);
                             * // => 9
                             */
                            var flow = createFlow();

                            /**
                             * This method is like `_.flow` except that it creates a function that
                             * invokes the given functions from right to left.
                             *
                             * @static
                             * @since 3.0.0
                             * @memberOf _
                             * @category Util
                             * @param {...(Function|Function[])} [funcs] The functions to invoke.
                             * @returns {Function} Returns the new composite function.
                             * @see _.flow
                             * @example
                             *
                             * function square(n) {
                             *   return n * n;
                             * }
                             *
                             * var addSquare = _.flowRight([square, _.add]);
                             * addSquare(1, 2);
                             * // => 9
                             */
                            var flowRight = createFlow(true);

                            /**
                             * This method returns the first argument it receives.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Util
                             * @param {*} value Any value.
                             * @returns {*} Returns `value`.
                             * @example
                             *
                             * var object = { 'a': 1 };
                             *
                             * console.log(_.identity(object) === object);
                             * // => true
                             */
                            function identity(value) {
                                return value;
                            }

                            /**
                             * Creates a function that invokes `func` with the arguments of the created
                             * function. If `func` is a property name, the created function returns the
                             * property value for a given element. If `func` is an array or object, the
                             * created function returns `true` for elements that contain the equivalent
                             * source properties, otherwise it returns `false`.
                             *
                             * @static
                             * @since 4.0.0
                             * @memberOf _
                             * @category Util
                             * @param {*} [func=_.identity] The value to convert to a callback.
                             * @returns {Function} Returns the callback.
                             * @example
                             *
                             * var users = [
                             *   { 'user': 'barney', 'age': 36, 'active': true },
                             *   { 'user': 'fred',   'age': 40, 'active': false }
                             * ];
                             *
                             * // The `_.matches` iteratee shorthand.
                             * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
                             * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
                             *
                             * // The `_.matchesProperty` iteratee shorthand.
                             * _.filter(users, _.iteratee(['user', 'fred']));
                             * // => [{ 'user': 'fred', 'age': 40 }]
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.map(users, _.iteratee('user'));
                             * // => ['barney', 'fred']
                             *
                             * // Create custom iteratee shorthands.
                             * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
                             *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
                             *     return func.test(string);
                             *   };
                             * });
                             *
                             * _.filter(['abc', 'def'], /ef/);
                             * // => ['def']
                             */
                            function iteratee(func) {
                                return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
                            }

                            /**
                             * Creates a function that performs a partial deep comparison between a given
                             * object and `source`, returning `true` if the given object has equivalent
                             * property values, else `false`.
                             *
                             * **Note:** The created function is equivalent to `_.isMatch` with `source`
                             * partially applied.
                             *
                             * Partial comparisons will match empty array and empty object `source`
                             * values against any array or object value, respectively. See `_.isEqual`
                             * for a list of supported value comparisons.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Util
                             * @param {Object} source The object of property values to match.
                             * @returns {Function} Returns the new spec function.
                             * @example
                             *
                             * var objects = [
                             *   { 'a': 1, 'b': 2, 'c': 3 },
                             *   { 'a': 4, 'b': 5, 'c': 6 }
                             * ];
                             *
                             * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
                             * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
                             */
                            function matches(source) {
                                return baseMatches(baseClone(source, CLONE_DEEP_FLAG));
                            }

                            /**
                             * Creates a function that performs a partial deep comparison between the
                             * value at `path` of a given object to `srcValue`, returning `true` if the
                             * object value is equivalent, else `false`.
                             *
                             * **Note:** Partial comparisons will match empty array and empty object
                             * `srcValue` values against any array or object value, respectively. See
                             * `_.isEqual` for a list of supported value comparisons.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.2.0
                             * @category Util
                             * @param {Array|string} path The path of the property to get.
                             * @param {*} srcValue The value to match.
                             * @returns {Function} Returns the new spec function.
                             * @example
                             *
                             * var objects = [
                             *   { 'a': 1, 'b': 2, 'c': 3 },
                             *   { 'a': 4, 'b': 5, 'c': 6 }
                             * ];
                             *
                             * _.find(objects, _.matchesProperty('a', 4));
                             * // => { 'a': 4, 'b': 5, 'c': 6 }
                             */
                            function matchesProperty(path, srcValue) {
                                return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));
                            }

                            /**
                             * Creates a function that invokes the method at `path` of a given object.
                             * Any additional arguments are provided to the invoked method.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.7.0
                             * @category Util
                             * @param {Array|string} path The path of the method to invoke.
                             * @param {...*} [args] The arguments to invoke the method with.
                             * @returns {Function} Returns the new invoker function.
                             * @example
                             *
                             * var objects = [
                             *   { 'a': { 'b': _.constant(2) } },
                             *   { 'a': { 'b': _.constant(1) } }
                             * ];
                             *
                             * _.map(objects, _.method('a.b'));
                             * // => [2, 1]
                             *
                             * _.map(objects, _.method(['a', 'b']));
                             * // => [2, 1]
                             */
                            var method = baseRest(function(path, args) {
                                return function(object) {
                                    return baseInvoke(object, path, args);
                                };
                            });

                            /**
                             * The opposite of `_.method`; this method creates a function that invokes
                             * the method at a given path of `object`. Any additional arguments are
                             * provided to the invoked method.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.7.0
                             * @category Util
                             * @param {Object} object The object to query.
                             * @param {...*} [args] The arguments to invoke the method with.
                             * @returns {Function} Returns the new invoker function.
                             * @example
                             *
                             * var array = _.times(3, _.constant),
                             *     object = { 'a': array, 'b': array, 'c': array };
                             *
                             * _.map(['a[2]', 'c[0]'], _.methodOf(object));
                             * // => [2, 0]
                             *
                             * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
                             * // => [2, 0]
                             */
                            var methodOf = baseRest(function(object, args) {
                                return function(path) {
                                    return baseInvoke(object, path, args);
                                };
                            });

                            /**
                             * Adds all own enumerable string keyed function properties of a source
                             * object to the destination object. If `object` is a function, then methods
                             * are added to its prototype as well.
                             *
                             * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
                             * avoid conflicts caused by modifying the original.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Util
                             * @param {Function|Object} [object=lodash] The destination object.
                             * @param {Object} source The object of functions to add.
                             * @param {Object} [options={}] The options object.
                             * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
                             * @returns {Function|Object} Returns `object`.
                             * @example
                             *
                             * function vowels(string) {
                             *   return _.filter(string, function(v) {
                             *     return /[aeiou]/i.test(v);
                             *   });
                             * }
                             *
                             * _.mixin({ 'vowels': vowels });
                             * _.vowels('fred');
                             * // => ['e']
                             *
                             * _('fred').vowels().value();
                             * // => ['e']
                             *
                             * _.mixin({ 'vowels': vowels }, { 'chain': false });
                             * _('fred').vowels();
                             * // => ['e']
                             */
                            function mixin(object, source, options) {
                                var props = keys(source),
                                    methodNames = baseFunctions(source, props);

                                if (options == null &&
                                    !(isObject(source) && (methodNames.length || !props.length))) {
                                    options = source;
                                    source = object;
                                    object = this;
                                    methodNames = baseFunctions(source, keys(source));
                                }
                                var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
                                    isFunc = isFunction(object);

                                arrayEach(methodNames, function(methodName) {
                                    var func = source[methodName];
                                    object[methodName] = func;
                                    if (isFunc) {
                                        object.prototype[methodName] = function() {
                                            var chainAll = this.__chain__;
                                            if (chain || chainAll) {
                                                var result = object(this.__wrapped__),
                                                    actions = result.__actions__ = copyArray(this.__actions__);

                                                actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
                                                result.__chain__ = chainAll;
                                                return result;
                                            }
                                            return func.apply(object, arrayPush([this.value()], arguments));
                                        };
                                    }
                                });

                                return object;
                            }

                            /**
                             * Reverts the `_` variable to its previous value and returns a reference to
                             * the `lodash` function.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Util
                             * @returns {Function} Returns the `lodash` function.
                             * @example
                             *
                             * var lodash = _.noConflict();
                             */
                            function noConflict() {
                                if (root._ === this) {
                                    root._ = oldDash;
                                }
                                return this;
                            }

                            /**
                             * This method returns `undefined`.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.3.0
                             * @category Util
                             * @example
                             *
                             * _.times(2, _.noop);
                             * // => [undefined, undefined]
                             */
                            function noop() {
                                // No operation performed.
                            }

                            /**
                             * Creates a function that gets the argument at index `n`. If `n` is negative,
                             * the nth argument from the end is returned.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Util
                             * @param {number} [n=0] The index of the argument to return.
                             * @returns {Function} Returns the new pass-thru function.
                             * @example
                             *
                             * var func = _.nthArg(1);
                             * func('a', 'b', 'c', 'd');
                             * // => 'b'
                             *
                             * var func = _.nthArg(-2);
                             * func('a', 'b', 'c', 'd');
                             * // => 'c'
                             */
                            function nthArg(n) {
                                n = toInteger(n);
                                return baseRest(function(args) {
                                    return baseNth(args, n);
                                });
                            }

                            /**
                             * Creates a function that invokes `iteratees` with the arguments it receives
                             * and returns their results.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Util
                             * @param {...(Function|Function[])} [iteratees=[_.identity]]
                             *  The iteratees to invoke.
                             * @returns {Function} Returns the new function.
                             * @example
                             *
                             * var func = _.over([Math.max, Math.min]);
                             *
                             * func(1, 2, 3, 4);
                             * // => [4, 1]
                             */
                            var over = createOver(arrayMap);

                            /**
                             * Creates a function that checks if **all** of the `predicates` return
                             * truthy when invoked with the arguments it receives.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Util
                             * @param {...(Function|Function[])} [predicates=[_.identity]]
                             *  The predicates to check.
                             * @returns {Function} Returns the new function.
                             * @example
                             *
                             * var func = _.overEvery([Boolean, isFinite]);
                             *
                             * func('1');
                             * // => true
                             *
                             * func(null);
                             * // => false
                             *
                             * func(NaN);
                             * // => false
                             */
                            var overEvery = createOver(arrayEvery);

                            /**
                             * Creates a function that checks if **any** of the `predicates` return
                             * truthy when invoked with the arguments it receives.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Util
                             * @param {...(Function|Function[])} [predicates=[_.identity]]
                             *  The predicates to check.
                             * @returns {Function} Returns the new function.
                             * @example
                             *
                             * var func = _.overSome([Boolean, isFinite]);
                             *
                             * func('1');
                             * // => true
                             *
                             * func(null);
                             * // => true
                             *
                             * func(NaN);
                             * // => false
                             */
                            var overSome = createOver(arraySome);

                            /**
                             * Creates a function that returns the value at `path` of a given object.
                             *
                             * @static
                             * @memberOf _
                             * @since 2.4.0
                             * @category Util
                             * @param {Array|string} path The path of the property to get.
                             * @returns {Function} Returns the new accessor function.
                             * @example
                             *
                             * var objects = [
                             *   { 'a': { 'b': 2 } },
                             *   { 'a': { 'b': 1 } }
                             * ];
                             *
                             * _.map(objects, _.property('a.b'));
                             * // => [2, 1]
                             *
                             * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
                             * // => [1, 2]
                             */
                            function property(path) {
                                return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
                            }

                            /**
                             * The opposite of `_.property`; this method creates a function that returns
                             * the value at a given path of `object`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.0.0
                             * @category Util
                             * @param {Object} object The object to query.
                             * @returns {Function} Returns the new accessor function.
                             * @example
                             *
                             * var array = [0, 1, 2],
                             *     object = { 'a': array, 'b': array, 'c': array };
                             *
                             * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
                             * // => [2, 0]
                             *
                             * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
                             * // => [2, 0]
                             */
                            function propertyOf(object) {
                                return function(path) {
                                    return object == null ? undefined : baseGet(object, path);
                                };
                            }

                            /**
                             * Creates an array of numbers (positive and/or negative) progressing from
                             * `start` up to, but not including, `end`. A step of `-1` is used if a negative
                             * `start` is specified without an `end` or `step`. If `end` is not specified,
                             * it's set to `start` with `start` then set to `0`.
                             *
                             * **Note:** JavaScript follows the IEEE-754 standard for resolving
                             * floating-point values which can produce unexpected results.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Util
                             * @param {number} [start=0] The start of the range.
                             * @param {number} end The end of the range.
                             * @param {number} [step=1] The value to increment or decrement by.
                             * @returns {Array} Returns the range of numbers.
                             * @see _.inRange, _.rangeRight
                             * @example
                             *
                             * _.range(4);
                             * // => [0, 1, 2, 3]
                             *
                             * _.range(-4);
                             * // => [0, -1, -2, -3]
                             *
                             * _.range(1, 5);
                             * // => [1, 2, 3, 4]
                             *
                             * _.range(0, 20, 5);
                             * // => [0, 5, 10, 15]
                             *
                             * _.range(0, -4, -1);
                             * // => [0, -1, -2, -3]
                             *
                             * _.range(1, 4, 0);
                             * // => [1, 1, 1]
                             *
                             * _.range(0);
                             * // => []
                             */
                            var range = createRange();

                            /**
                             * This method is like `_.range` except that it populates values in
                             * descending order.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Util
                             * @param {number} [start=0] The start of the range.
                             * @param {number} end The end of the range.
                             * @param {number} [step=1] The value to increment or decrement by.
                             * @returns {Array} Returns the range of numbers.
                             * @see _.inRange, _.range
                             * @example
                             *
                             * _.rangeRight(4);
                             * // => [3, 2, 1, 0]
                             *
                             * _.rangeRight(-4);
                             * // => [-3, -2, -1, 0]
                             *
                             * _.rangeRight(1, 5);
                             * // => [4, 3, 2, 1]
                             *
                             * _.rangeRight(0, 20, 5);
                             * // => [15, 10, 5, 0]
                             *
                             * _.rangeRight(0, -4, -1);
                             * // => [-3, -2, -1, 0]
                             *
                             * _.rangeRight(1, 4, 0);
                             * // => [1, 1, 1]
                             *
                             * _.rangeRight(0);
                             * // => []
                             */
                            var rangeRight = createRange(true);

                            /**
                             * This method returns a new empty array.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.13.0
                             * @category Util
                             * @returns {Array} Returns the new empty array.
                             * @example
                             *
                             * var arrays = _.times(2, _.stubArray);
                             *
                             * console.log(arrays);
                             * // => [[], []]
                             *
                             * console.log(arrays[0] === arrays[1]);
                             * // => false
                             */
                            function stubArray() {
                                return [];
                            }

                            /**
                             * This method returns `false`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.13.0
                             * @category Util
                             * @returns {boolean} Returns `false`.
                             * @example
                             *
                             * _.times(2, _.stubFalse);
                             * // => [false, false]
                             */
                            function stubFalse() {
                                return false;
                            }

                            /**
                             * This method returns a new empty object.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.13.0
                             * @category Util
                             * @returns {Object} Returns the new empty object.
                             * @example
                             *
                             * var objects = _.times(2, _.stubObject);
                             *
                             * console.log(objects);
                             * // => [{}, {}]
                             *
                             * console.log(objects[0] === objects[1]);
                             * // => false
                             */
                            function stubObject() {
                                return {};
                            }

                            /**
                             * This method returns an empty string.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.13.0
                             * @category Util
                             * @returns {string} Returns the empty string.
                             * @example
                             *
                             * _.times(2, _.stubString);
                             * // => ['', '']
                             */
                            function stubString() {
                                return '';
                            }

                            /**
                             * This method returns `true`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.13.0
                             * @category Util
                             * @returns {boolean} Returns `true`.
                             * @example
                             *
                             * _.times(2, _.stubTrue);
                             * // => [true, true]
                             */
                            function stubTrue() {
                                return true;
                            }

                            /**
                             * Invokes the iteratee `n` times, returning an array of the results of
                             * each invocation. The iteratee is invoked with one argument; (index).
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Util
                             * @param {number} n The number of times to invoke `iteratee`.
                             * @param {Function} [iteratee=_.identity] The function invoked per iteration.
                             * @returns {Array} Returns the array of results.
                             * @example
                             *
                             * _.times(3, String);
                             * // => ['0', '1', '2']
                             *
                             *  _.times(4, _.constant(0));
                             * // => [0, 0, 0, 0]
                             */
                            function times(n, iteratee) {
                                n = toInteger(n);
                                if (n < 1 || n > MAX_SAFE_INTEGER) {
                                    return [];
                                }
                                var index = MAX_ARRAY_LENGTH,
                                    length = nativeMin(n, MAX_ARRAY_LENGTH);

                                iteratee = getIteratee(iteratee);
                                n -= MAX_ARRAY_LENGTH;

                                var result = baseTimes(length, iteratee);
                                while (++index < n) {
                                    iteratee(index);
                                }
                                return result;
                            }

                            /**
                             * Converts `value` to a property path array.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Util
                             * @param {*} value The value to convert.
                             * @returns {Array} Returns the new property path array.
                             * @example
                             *
                             * _.toPath('a.b.c');
                             * // => ['a', 'b', 'c']
                             *
                             * _.toPath('a[0].b.c');
                             * // => ['a', '0', 'b', 'c']
                             */
                            function toPath(value) {
                                if (isArray(value)) {
                                    return arrayMap(value, toKey);
                                }
                                return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
                            }

                            /**
                             * Generates a unique ID. If `prefix` is given, the ID is appended to it.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Util
                             * @param {string} [prefix=''] The value to prefix the ID with.
                             * @returns {string} Returns the unique ID.
                             * @example
                             *
                             * _.uniqueId('contact_');
                             * // => 'contact_104'
                             *
                             * _.uniqueId();
                             * // => '105'
                             */
                            function uniqueId(prefix) {
                                var id = ++idCounter;
                                return toString(prefix) + id;
                            }

                            /*------------------------------------------------------------------------*/

                            /**
                             * Adds two numbers.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.4.0
                             * @category Math
                             * @param {number} augend The first number in an addition.
                             * @param {number} addend The second number in an addition.
                             * @returns {number} Returns the total.
                             * @example
                             *
                             * _.add(6, 4);
                             * // => 10
                             */
                            var add = createMathOperation(function(augend, addend) {
                                return augend + addend;
                            }, 0);

                            /**
                             * Computes `number` rounded up to `precision`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.10.0
                             * @category Math
                             * @param {number} number The number to round up.
                             * @param {number} [precision=0] The precision to round up to.
                             * @returns {number} Returns the rounded up number.
                             * @example
                             *
                             * _.ceil(4.006);
                             * // => 5
                             *
                             * _.ceil(6.004, 2);
                             * // => 6.01
                             *
                             * _.ceil(6040, -2);
                             * // => 6100
                             */
                            var ceil = createRound('ceil');

                            /**
                             * Divide two numbers.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.7.0
                             * @category Math
                             * @param {number} dividend The first number in a division.
                             * @param {number} divisor The second number in a division.
                             * @returns {number} Returns the quotient.
                             * @example
                             *
                             * _.divide(6, 4);
                             * // => 1.5
                             */
                            var divide = createMathOperation(function(dividend, divisor) {
                                return dividend / divisor;
                            }, 1);

                            /**
                             * Computes `number` rounded down to `precision`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.10.0
                             * @category Math
                             * @param {number} number The number to round down.
                             * @param {number} [precision=0] The precision to round down to.
                             * @returns {number} Returns the rounded down number.
                             * @example
                             *
                             * _.floor(4.006);
                             * // => 4
                             *
                             * _.floor(0.046, 2);
                             * // => 0.04
                             *
                             * _.floor(4060, -2);
                             * // => 4000
                             */
                            var floor = createRound('floor');

                            /**
                             * Computes the maximum value of `array`. If `array` is empty or falsey,
                             * `undefined` is returned.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Math
                             * @param {Array} array The array to iterate over.
                             * @returns {*} Returns the maximum value.
                             * @example
                             *
                             * _.max([4, 2, 8, 6]);
                             * // => 8
                             *
                             * _.max([]);
                             * // => undefined
                             */
                            function max(array) {
                                return (array && array.length) ?
                                    baseExtremum(array, identity, baseGt) :
                                    undefined;
                            }

                            /**
                             * This method is like `_.max` except that it accepts `iteratee` which is
                             * invoked for each element in `array` to generate the criterion by which
                             * the value is ranked. The iteratee is invoked with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Math
                             * @param {Array} array The array to iterate over.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {*} Returns the maximum value.
                             * @example
                             *
                             * var objects = [{ 'n': 1 }, { 'n': 2 }];
                             *
                             * _.maxBy(objects, function(o) { return o.n; });
                             * // => { 'n': 2 }
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.maxBy(objects, 'n');
                             * // => { 'n': 2 }
                             */
                            function maxBy(array, iteratee) {
                                return (array && array.length) ?
                                    baseExtremum(array, getIteratee(iteratee, 2), baseGt) :
                                    undefined;
                            }

                            /**
                             * Computes the mean of the values in `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Math
                             * @param {Array} array The array to iterate over.
                             * @returns {number} Returns the mean.
                             * @example
                             *
                             * _.mean([4, 2, 8, 6]);
                             * // => 5
                             */
                            function mean(array) {
                                return baseMean(array, identity);
                            }

                            /**
                             * This method is like `_.mean` except that it accepts `iteratee` which is
                             * invoked for each element in `array` to generate the value to be averaged.
                             * The iteratee is invoked with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.7.0
                             * @category Math
                             * @param {Array} array The array to iterate over.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {number} Returns the mean.
                             * @example
                             *
                             * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
                             *
                             * _.meanBy(objects, function(o) { return o.n; });
                             * // => 5
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.meanBy(objects, 'n');
                             * // => 5
                             */
                            function meanBy(array, iteratee) {
                                return baseMean(array, getIteratee(iteratee, 2));
                            }

                            /**
                             * Computes the minimum value of `array`. If `array` is empty or falsey,
                             * `undefined` is returned.
                             *
                             * @static
                             * @since 0.1.0
                             * @memberOf _
                             * @category Math
                             * @param {Array} array The array to iterate over.
                             * @returns {*} Returns the minimum value.
                             * @example
                             *
                             * _.min([4, 2, 8, 6]);
                             * // => 2
                             *
                             * _.min([]);
                             * // => undefined
                             */
                            function min(array) {
                                return (array && array.length) ?
                                    baseExtremum(array, identity, baseLt) :
                                    undefined;
                            }

                            /**
                             * This method is like `_.min` except that it accepts `iteratee` which is
                             * invoked for each element in `array` to generate the criterion by which
                             * the value is ranked. The iteratee is invoked with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Math
                             * @param {Array} array The array to iterate over.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {*} Returns the minimum value.
                             * @example
                             *
                             * var objects = [{ 'n': 1 }, { 'n': 2 }];
                             *
                             * _.minBy(objects, function(o) { return o.n; });
                             * // => { 'n': 1 }
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.minBy(objects, 'n');
                             * // => { 'n': 1 }
                             */
                            function minBy(array, iteratee) {
                                return (array && array.length) ?
                                    baseExtremum(array, getIteratee(iteratee, 2), baseLt) :
                                    undefined;
                            }

                            /**
                             * Multiply two numbers.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.7.0
                             * @category Math
                             * @param {number} multiplier The first number in a multiplication.
                             * @param {number} multiplicand The second number in a multiplication.
                             * @returns {number} Returns the product.
                             * @example
                             *
                             * _.multiply(6, 4);
                             * // => 24
                             */
                            var multiply = createMathOperation(function(multiplier, multiplicand) {
                                return multiplier * multiplicand;
                            }, 1);

                            /**
                             * Computes `number` rounded to `precision`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.10.0
                             * @category Math
                             * @param {number} number The number to round.
                             * @param {number} [precision=0] The precision to round to.
                             * @returns {number} Returns the rounded number.
                             * @example
                             *
                             * _.round(4.006);
                             * // => 4
                             *
                             * _.round(4.006, 2);
                             * // => 4.01
                             *
                             * _.round(4060, -2);
                             * // => 4100
                             */
                            var round = createRound('round');

                            /**
                             * Subtract two numbers.
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Math
                             * @param {number} minuend The first number in a subtraction.
                             * @param {number} subtrahend The second number in a subtraction.
                             * @returns {number} Returns the difference.
                             * @example
                             *
                             * _.subtract(6, 4);
                             * // => 2
                             */
                            var subtract = createMathOperation(function(minuend, subtrahend) {
                                return minuend - subtrahend;
                            }, 0);

                            /**
                             * Computes the sum of the values in `array`.
                             *
                             * @static
                             * @memberOf _
                             * @since 3.4.0
                             * @category Math
                             * @param {Array} array The array to iterate over.
                             * @returns {number} Returns the sum.
                             * @example
                             *
                             * _.sum([4, 2, 8, 6]);
                             * // => 20
                             */
                            function sum(array) {
                                return (array && array.length) ?
                                    baseSum(array, identity) :
                                    0;
                            }

                            /**
                             * This method is like `_.sum` except that it accepts `iteratee` which is
                             * invoked for each element in `array` to generate the value to be summed.
                             * The iteratee is invoked with one argument: (value).
                             *
                             * @static
                             * @memberOf _
                             * @since 4.0.0
                             * @category Math
                             * @param {Array} array The array to iterate over.
                             * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
                             * @returns {number} Returns the sum.
                             * @example
                             *
                             * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
                             *
                             * _.sumBy(objects, function(o) { return o.n; });
                             * // => 20
                             *
                             * // The `_.property` iteratee shorthand.
                             * _.sumBy(objects, 'n');
                             * // => 20
                             */
                            function sumBy(array, iteratee) {
                                return (array && array.length) ?
                                    baseSum(array, getIteratee(iteratee, 2)) :
                                    0;
                            }

                            /*------------------------------------------------------------------------*/

                            // Add methods that return wrapped values in chain sequences.
                            lodash.after = after;
                            lodash.ary = ary;
                            lodash.assign = assign;
                            lodash.assignIn = assignIn;
                            lodash.assignInWith = assignInWith;
                            lodash.assignWith = assignWith;
                            lodash.at = at;
                            lodash.before = before;
                            lodash.bind = bind;
                            lodash.bindAll = bindAll;
                            lodash.bindKey = bindKey;
                            lodash.castArray = castArray;
                            lodash.chain = chain;
                            lodash.chunk = chunk;
                            lodash.compact = compact;
                            lodash.concat = concat;
                            lodash.cond = cond;
                            lodash.conforms = conforms;
                            lodash.constant = constant;
                            lodash.countBy = countBy;
                            lodash.create = create;
                            lodash.curry = curry;
                            lodash.curryRight = curryRight;
                            lodash.debounce = debounce;
                            lodash.defaults = defaults;
                            lodash.defaultsDeep = defaultsDeep;
                            lodash.defer = defer;
                            lodash.delay = delay;
                            lodash.difference = difference;
                            lodash.differenceBy = differenceBy;
                            lodash.differenceWith = differenceWith;
                            lodash.drop = drop;
                            lodash.dropRight = dropRight;
                            lodash.dropRightWhile = dropRightWhile;
                            lodash.dropWhile = dropWhile;
                            lodash.fill = fill;
                            lodash.filter = filter;
                            lodash.flatMap = flatMap;
                            lodash.flatMapDeep = flatMapDeep;
                            lodash.flatMapDepth = flatMapDepth;
                            lodash.flatten = flatten;
                            lodash.flattenDeep = flattenDeep;
                            lodash.flattenDepth = flattenDepth;
                            lodash.flip = flip;
                            lodash.flow = flow;
                            lodash.flowRight = flowRight;
                            lodash.fromPairs = fromPairs;
                            lodash.functions = functions;
                            lodash.functionsIn = functionsIn;
                            lodash.groupBy = groupBy;
                            lodash.initial = initial;
                            lodash.intersection = intersection;
                            lodash.intersectionBy = intersectionBy;
                            lodash.intersectionWith = intersectionWith;
                            lodash.invert = invert;
                            lodash.invertBy = invertBy;
                            lodash.invokeMap = invokeMap;
                            lodash.iteratee = iteratee;
                            lodash.keyBy = keyBy;
                            lodash.keys = keys;
                            lodash.keysIn = keysIn;
                            lodash.map = map;
                            lodash.mapKeys = mapKeys;
                            lodash.mapValues = mapValues;
                            lodash.matches = matches;
                            lodash.matchesProperty = matchesProperty;
                            lodash.memoize = memoize;
                            lodash.merge = merge;
                            lodash.mergeWith = mergeWith;
                            lodash.method = method;
                            lodash.methodOf = methodOf;
                            lodash.mixin = mixin;
                            lodash.negate = negate;
                            lodash.nthArg = nthArg;
                            lodash.omit = omit;
                            lodash.omitBy = omitBy;
                            lodash.once = once;
                            lodash.orderBy = orderBy;
                            lodash.over = over;
                            lodash.overArgs = overArgs;
                            lodash.overEvery = overEvery;
                            lodash.overSome = overSome;
                            lodash.partial = partial;
                            lodash.partialRight = partialRight;
                            lodash.partition = partition;
                            lodash.pick = pick;
                            lodash.pickBy = pickBy;
                            lodash.property = property;
                            lodash.propertyOf = propertyOf;
                            lodash.pull = pull;
                            lodash.pullAll = pullAll;
                            lodash.pullAllBy = pullAllBy;
                            lodash.pullAllWith = pullAllWith;
                            lodash.pullAt = pullAt;
                            lodash.range = range;
                            lodash.rangeRight = rangeRight;
                            lodash.rearg = rearg;
                            lodash.reject = reject;
                            lodash.remove = remove;
                            lodash.rest = rest;
                            lodash.reverse = reverse;
                            lodash.sampleSize = sampleSize;
                            lodash.set = set;
                            lodash.setWith = setWith;
                            lodash.shuffle = shuffle;
                            lodash.slice = slice;
                            lodash.sortBy = sortBy;
                            lodash.sortedUniq = sortedUniq;
                            lodash.sortedUniqBy = sortedUniqBy;
                            lodash.split = split;
                            lodash.spread = spread;
                            lodash.tail = tail;
                            lodash.take = take;
                            lodash.takeRight = takeRight;
                            lodash.takeRightWhile = takeRightWhile;
                            lodash.takeWhile = takeWhile;
                            lodash.tap = tap;
                            lodash.throttle = throttle;
                            lodash.thru = thru;
                            lodash.toArray = toArray;
                            lodash.toPairs = toPairs;
                            lodash.toPairsIn = toPairsIn;
                            lodash.toPath = toPath;
                            lodash.toPlainObject = toPlainObject;
                            lodash.transform = transform;
                            lodash.unary = unary;
                            lodash.union = union;
                            lodash.unionBy = unionBy;
                            lodash.unionWith = unionWith;
                            lodash.uniq = uniq;
                            lodash.uniqBy = uniqBy;
                            lodash.uniqWith = uniqWith;
                            lodash.unset = unset;
                            lodash.unzip = unzip;
                            lodash.unzipWith = unzipWith;
                            lodash.update = update;
                            lodash.updateWith = updateWith;
                            lodash.values = values;
                            lodash.valuesIn = valuesIn;
                            lodash.without = without;
                            lodash.words = words;
                            lodash.wrap = wrap;
                            lodash.xor = xor;
                            lodash.xorBy = xorBy;
                            lodash.xorWith = xorWith;
                            lodash.zip = zip;
                            lodash.zipObject = zipObject;
                            lodash.zipObjectDeep = zipObjectDeep;
                            lodash.zipWith = zipWith;

                            // Add aliases.
                            lodash.entries = toPairs;
                            lodash.entriesIn = toPairsIn;
                            lodash.extend = assignIn;
                            lodash.extendWith = assignInWith;

                            // Add methods to `lodash.prototype`.
                            mixin(lodash, lodash);

                            /*------------------------------------------------------------------------*/

                            // Add methods that return unwrapped values in chain sequences.
                            lodash.add = add;
                            lodash.attempt = attempt;
                            lodash.camelCase = camelCase;
                            lodash.capitalize = capitalize;
                            lodash.ceil = ceil;
                            lodash.clamp = clamp;
                            lodash.clone = clone;
                            lodash.cloneDeep = cloneDeep;
                            lodash.cloneDeepWith = cloneDeepWith;
                            lodash.cloneWith = cloneWith;
                            lodash.conformsTo = conformsTo;
                            lodash.deburr = deburr;
                            lodash.defaultTo = defaultTo;
                            lodash.divide = divide;
                            lodash.endsWith = endsWith;
                            lodash.eq = eq;
                            lodash.escape = escape;
                            lodash.escapeRegExp = escapeRegExp;
                            lodash.every = every;
                            lodash.find = find;
                            lodash.findIndex = findIndex;
                            lodash.findKey = findKey;
                            lodash.findLast = findLast;
                            lodash.findLastIndex = findLastIndex;
                            lodash.findLastKey = findLastKey;
                            lodash.floor = floor;
                            lodash.forEach = forEach;
                            lodash.forEachRight = forEachRight;
                            lodash.forIn = forIn;
                            lodash.forInRight = forInRight;
                            lodash.forOwn = forOwn;
                            lodash.forOwnRight = forOwnRight;
                            lodash.get = get;
                            lodash.gt = gt;
                            lodash.gte = gte;
                            lodash.has = has;
                            lodash.hasIn = hasIn;
                            lodash.head = head;
                            lodash.identity = identity;
                            lodash.includes = includes;
                            lodash.indexOf = indexOf;
                            lodash.inRange = inRange;
                            lodash.invoke = invoke;
                            lodash.isArguments = isArguments;
                            lodash.isArray = isArray;
                            lodash.isArrayBuffer = isArrayBuffer;
                            lodash.isArrayLike = isArrayLike;
                            lodash.isArrayLikeObject = isArrayLikeObject;
                            lodash.isBoolean = isBoolean;
                            lodash.isBuffer = isBuffer;
                            lodash.isDate = isDate;
                            lodash.isElement = isElement;
                            lodash.isEmpty = isEmpty;
                            lodash.isEqual = isEqual;
                            lodash.isEqualWith = isEqualWith;
                            lodash.isError = isError;
                            lodash.isFinite = isFinite;
                            lodash.isFunction = isFunction;
                            lodash.isInteger = isInteger;
                            lodash.isLength = isLength;
                            lodash.isMap = isMap;
                            lodash.isMatch = isMatch;
                            lodash.isMatchWith = isMatchWith;
                            lodash.isNaN = isNaN;
                            lodash.isNative = isNative;
                            lodash.isNil = isNil;
                            lodash.isNull = isNull;
                            lodash.isNumber = isNumber;
                            lodash.isObject = isObject;
                            lodash.isObjectLike = isObjectLike;
                            lodash.isPlainObject = isPlainObject;
                            lodash.isRegExp = isRegExp;
                            lodash.isSafeInteger = isSafeInteger;
                            lodash.isSet = isSet;
                            lodash.isString = isString;
                            lodash.isSymbol = isSymbol;
                            lodash.isTypedArray = isTypedArray;
                            lodash.isUndefined = isUndefined;
                            lodash.isWeakMap = isWeakMap;
                            lodash.isWeakSet = isWeakSet;
                            lodash.join = join;
                            lodash.kebabCase = kebabCase;
                            lodash.last = last;
                            lodash.lastIndexOf = lastIndexOf;
                            lodash.lowerCase = lowerCase;
                            lodash.lowerFirst = lowerFirst;
                            lodash.lt = lt;
                            lodash.lte = lte;
                            lodash.max = max;
                            lodash.maxBy = maxBy;
                            lodash.mean = mean;
                            lodash.meanBy = meanBy;
                            lodash.min = min;
                            lodash.minBy = minBy;
                            lodash.stubArray = stubArray;
                            lodash.stubFalse = stubFalse;
                            lodash.stubObject = stubObject;
                            lodash.stubString = stubString;
                            lodash.stubTrue = stubTrue;
                            lodash.multiply = multiply;
                            lodash.nth = nth;
                            lodash.noConflict = noConflict;
                            lodash.noop = noop;
                            lodash.now = now;
                            lodash.pad = pad;
                            lodash.padEnd = padEnd;
                            lodash.padStart = padStart;
                            lodash.parseInt = parseInt;
                            lodash.random = random;
                            lodash.reduce = reduce;
                            lodash.reduceRight = reduceRight;
                            lodash.repeat = repeat;
                            lodash.replace = replace;
                            lodash.result = result;
                            lodash.round = round;
                            lodash.runInContext = runInContext;
                            lodash.sample = sample;
                            lodash.size = size;
                            lodash.snakeCase = snakeCase;
                            lodash.some = some;
                            lodash.sortedIndex = sortedIndex;
                            lodash.sortedIndexBy = sortedIndexBy;
                            lodash.sortedIndexOf = sortedIndexOf;
                            lodash.sortedLastIndex = sortedLastIndex;
                            lodash.sortedLastIndexBy = sortedLastIndexBy;
                            lodash.sortedLastIndexOf = sortedLastIndexOf;
                            lodash.startCase = startCase;
                            lodash.startsWith = startsWith;
                            lodash.subtract = subtract;
                            lodash.sum = sum;
                            lodash.sumBy = sumBy;
                            lodash.template = template;
                            lodash.times = times;
                            lodash.toFinite = toFinite;
                            lodash.toInteger = toInteger;
                            lodash.toLength = toLength;
                            lodash.toLower = toLower;
                            lodash.toNumber = toNumber;
                            lodash.toSafeInteger = toSafeInteger;
                            lodash.toString = toString;
                            lodash.toUpper = toUpper;
                            lodash.trim = trim;
                            lodash.trimEnd = trimEnd;
                            lodash.trimStart = trimStart;
                            lodash.truncate = truncate;
                            lodash.unescape = unescape;
                            lodash.uniqueId = uniqueId;
                            lodash.upperCase = upperCase;
                            lodash.upperFirst = upperFirst;

                            // Add aliases.
                            lodash.each = forEach;
                            lodash.eachRight = forEachRight;
                            lodash.first = head;

                            mixin(lodash, (function() {
                                var source = {};
                                baseForOwn(lodash, function(func, methodName) {
                                    if (!hasOwnProperty.call(lodash.prototype, methodName)) {
                                        source[methodName] = func;
                                    }
                                });
                                return source;
                            }()), { 'chain': false });

                            /*------------------------------------------------------------------------*/

                            /**
                             * The semantic version number.
                             *
                             * @static
                             * @memberOf _
                             * @type {string}
                             */
                            lodash.VERSION = VERSION;

                            // Assign default placeholders.
                            arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
                                lodash[methodName].placeholder = lodash;
                            });

                            // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
                            arrayEach(['drop', 'take'], function(methodName, index) {
                                LazyWrapper.prototype[methodName] = function(n) {
                                    n = n === undefined ? 1 : nativeMax(toInteger(n), 0);

                                    var result = (this.__filtered__ && !index) ?
                                        new LazyWrapper(this) :
                                        this.clone();

                                    if (result.__filtered__) {
                                        result.__takeCount__ = nativeMin(n, result.__takeCount__);
                                    } else {
                                        result.__views__.push({
                                            'size': nativeMin(n, MAX_ARRAY_LENGTH),
                                            'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
                                        });
                                    }
                                    return result;
                                };

                                LazyWrapper.prototype[methodName + 'Right'] = function(n) {
                                    return this.reverse()[methodName](n).reverse();
                                };
                            });

                            // Add `LazyWrapper` methods that accept an `iteratee` value.
                            arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
                                var type = index + 1,
                                    isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;

                                LazyWrapper.prototype[methodName] = function(iteratee) {
                                    var result = this.clone();
                                    result.__iteratees__.push({
                                        'iteratee': getIteratee(iteratee, 3),
                                        'type': type
                                    });
                                    result.__filtered__ = result.__filtered__ || isFilter;
                                    return result;
                                };
                            });

                            // Add `LazyWrapper` methods for `_.head` and `_.last`.
                            arrayEach(['head', 'last'], function(methodName, index) {
                                var takeName = 'take' + (index ? 'Right' : '');

                                LazyWrapper.prototype[methodName] = function() {
                                    return this[takeName](1).value()[0];
                                };
                            });

                            // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
                            arrayEach(['initial', 'tail'], function(methodName, index) {
                                var dropName = 'drop' + (index ? '' : 'Right');

                                LazyWrapper.prototype[methodName] = function() {
                                    return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
                                };
                            });

                            LazyWrapper.prototype.compact = function() {
                                return this.filter(identity);
                            };

                            LazyWrapper.prototype.find = function(predicate) {
                                return this.filter(predicate).head();
                            };

                            LazyWrapper.prototype.findLast = function(predicate) {
                                return this.reverse().find(predicate);
                            };

                            LazyWrapper.prototype.invokeMap = baseRest(function(path, args) {
                                if (typeof path == 'function') {
                                    return new LazyWrapper(this);
                                }
                                return this.map(function(value) {
                                    return baseInvoke(value, path, args);
                                });
                            });

                            LazyWrapper.prototype.reject = function(predicate) {
                                return this.filter(negate(getIteratee(predicate)));
                            };

                            LazyWrapper.prototype.slice = function(start, end) {
                                start = toInteger(start);

                                var result = this;
                                if (result.__filtered__ && (start > 0 || end < 0)) {
                                    return new LazyWrapper(result);
                                }
                                if (start < 0) {
                                    result = result.takeRight(-start);
                                } else if (start) {
                                    result = result.drop(start);
                                }
                                if (end !== undefined) {
                                    end = toInteger(end);
                                    result = end < 0 ? result.dropRight(-end) : result.take(end - start);
                                }
                                return result;
                            };

                            LazyWrapper.prototype.takeRightWhile = function(predicate) {
                                return this.reverse().takeWhile(predicate).reverse();
                            };

                            LazyWrapper.prototype.toArray = function() {
                                return this.take(MAX_ARRAY_LENGTH);
                            };

                            // Add `LazyWrapper` methods to `lodash.prototype`.
                            baseForOwn(LazyWrapper.prototype, function(func, methodName) {
                                var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
                                    isTaker = /^(?:head|last)$/.test(methodName),
                                    lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
                                    retUnwrapped = isTaker || /^find/.test(methodName);

                                if (!lodashFunc) {
                                    return;
                                }
                                lodash.prototype[methodName] = function() {
                                    var value = this.__wrapped__,
                                        args = isTaker ? [1] : arguments,
                                        isLazy = value instanceof LazyWrapper,
                                        iteratee = args[0],
                                        useLazy = isLazy || isArray(value);

                                    var interceptor = function(value) {
                                        var result = lodashFunc.apply(lodash, arrayPush([value], args));
                                        return (isTaker && chainAll) ? result[0] : result;
                                    };

                                    if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
                                        // Avoid lazy use if the iteratee has a "length" value other than `1`.
                                        isLazy = useLazy = false;
                                    }
                                    var chainAll = this.__chain__,
                                        isHybrid = !!this.__actions__.length,
                                        isUnwrapped = retUnwrapped && !chainAll,
                                        onlyLazy = isLazy && !isHybrid;

                                    if (!retUnwrapped && useLazy) {
                                        value = onlyLazy ? value : new LazyWrapper(this);
                                        var result = func.apply(value, args);
                                        result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
                                        return new LodashWrapper(result, chainAll);
                                    }
                                    if (isUnwrapped && onlyLazy) {
                                        return func.apply(this, args);
                                    }
                                    result = this.thru(interceptor);
                                    return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
                                };
                            });

                            // Add `Array` methods to `lodash.prototype`.
                            arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
                                var func = arrayProto[methodName],
                                    chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
                                    retUnwrapped = /^(?:pop|shift)$/.test(methodName);

                                lodash.prototype[methodName] = function() {
                                    var args = arguments;
                                    if (retUnwrapped && !this.__chain__) {
                                        var value = this.value();
                                        return func.apply(isArray(value) ? value : [], args);
                                    }
                                    return this[chainName](function(value) {
                                        return func.apply(isArray(value) ? value : [], args);
                                    });
                                };
                            });

                            // Map minified method names to their real names.
                            baseForOwn(LazyWrapper.prototype, function(func, methodName) {
                                var lodashFunc = lodash[methodName];
                                if (lodashFunc) {
                                    var key = (lodashFunc.name + ''),
                                        names = realNames[key] || (realNames[key] = []);

                                    names.push({ 'name': methodName, 'func': lodashFunc });
                                }
                            });

                            realNames[createHybrid(undefined, WRAP_BIND_KEY_FLAG).name] = [{
                                'name': 'wrapper',
                                'func': undefined
                            }];

                            // Add methods to `LazyWrapper`.
                            LazyWrapper.prototype.clone = lazyClone;
                            LazyWrapper.prototype.reverse = lazyReverse;
                            LazyWrapper.prototype.value = lazyValue;

                            // Add chain sequence methods to the `lodash` wrapper.
                            lodash.prototype.at = wrapperAt;
                            lodash.prototype.chain = wrapperChain;
                            lodash.prototype.commit = wrapperCommit;
                            lodash.prototype.next = wrapperNext;
                            lodash.prototype.plant = wrapperPlant;
                            lodash.prototype.reverse = wrapperReverse;
                            lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;

                            // Add lazy aliases.
                            lodash.prototype.first = lodash.prototype.head;

                            if (symIterator) {
                                lodash.prototype[symIterator] = wrapperToIterator;
                            }
                            return lodash;
                        });

                        /*--------------------------------------------------------------------------*/

                        // Export lodash.
                        var _ = runInContext();

                        // Some AMD build optimizers, like r.js, check for condition patterns like:
                        if (true) {
                            // Expose Lodash on the global object to prevent errors when Lodash is
                            // loaded by a script tag in the presence of an AMD loader.
                            // See http://requirejs.org/docs/errors.html#mismatch for more details.
                            // Use `_.noConflict` to remove Lodash from the global object.
                            root._ = _;

                            // Define as an anonymous module so, through path mapping, it can be
                            // referenced as the "underscore" module.
                            !(__WEBPACK_AMD_DEFINE_RESULT__ = function() {
                                    return _;
                                }.call(exports, __webpack_require__, exports, module),
                                __WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
                        }
                        // Check for `exports` after `define` in case a build optimizer adds it.
                        else if (freeModule) {
                            // Export for Node.js.
                            (freeModule.exports = _)._ = _;
                            // Export for CommonJS support.
                            freeExports._ = _;
                        } else {
                            // Export to the global object.
                            root._ = _;
                        }
                    }.call(this));

                    /* WEBPACK VAR INJECTION */
                }.call(exports, __webpack_require__(46), __webpack_require__(139)(module)))

                /***/
            }),
            /* 6 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__constant__ = __webpack_require__(32);
                /* harmony export (immutable) */
                __webpack_exports__["b"] = hue;
                /* harmony export (immutable) */
                __webpack_exports__["c"] = gamma;
                /* harmony export (immutable) */
                __webpack_exports__["a"] = nogamma;


                function linear(a, d) {
                    return function(t) {
                        return a + t * d;
                    };
                }

                function exponential(a, b, y) {
                    return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y,
                        function(t) {
                            return Math.pow(a + t * b, y);
                        };
                }

                function hue(a, b) {
                    var d = b - a;
                    return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__constant__["a" /* default */ ])(isNaN(a) ? b : a);
                }

                function gamma(y) {
                    return (y = +y) === 1 ? nogamma : function(a, b) {
                        return b - a ? exponential(a, b, y) : __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__constant__["a" /* default */ ])(isNaN(a) ? b : a);
                    };
                }

                function nogamma(a, b) {
                    var d = b - a;
                    return d ? linear(a, d) : __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__constant__["a" /* default */ ])(isNaN(a) ? b : a);
                }


                /***/
            }),
            /* 7 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function(a, b) {
                    return a = +a, b -= a,
                        function(t) {
                            return a + b * t;
                        };
                };


                /***/
            }),
            /* 8 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__schedule__ = __webpack_require__(1);
                /* harmony export (immutable) */
                __webpack_exports__["b"] = tweenValue;


                function tweenRemove(id, name) {
                    var tween0, tween1;
                    return function() {
                        var schedule = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["e" /* set */ ])(this, id),
                            tween = schedule.tween;

                        // If this node shared tween with the previous node,
                        // just assign the updated shared tween and we’re done!
                        // Otherwise, copy-on-write.
                        if (tween !== tween0) {
                            tween1 = tween0 = tween;
                            for (var i = 0, n = tween1.length; i < n; ++i) {
                                if (tween1[i].name === name) {
                                    tween1 = tween1.slice();
                                    tween1.splice(i, 1);
                                    break;
                                }
                            }
                        }

                        schedule.tween = tween1;
                    };
                }

                function tweenFunction(id, name, value) {
                    var tween0, tween1;
                    if (typeof value !== "function") throw new Error;
                    return function() {
                        var schedule = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["e" /* set */ ])(this, id),
                            tween = schedule.tween;

                        // If this node shared tween with the previous node,
                        // just assign the updated shared tween and we’re done!
                        // Otherwise, copy-on-write.
                        if (tween !== tween0) {
                            tween1 = (tween0 = tween).slice();
                            for (var t = { name: name, value: value }, i = 0, n = tween1.length; i < n; ++i) {
                                if (tween1[i].name === name) {
                                    tween1[i] = t;
                                    break;
                                }
                            }
                            if (i === n) tween1.push(t);
                        }

                        schedule.tween = tween1;
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name, value) {
                    var id = this._id;

                    name += "";

                    if (arguments.length < 2) {
                        var tween = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["f" /* get */ ])(this.node(), id).tween;
                        for (var i = 0, n = tween.length, t; i < n; ++i) {
                            if ((t = tween[i]).name === name) {
                                return t.value;
                            }
                        }
                        return null;
                    }

                    return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
                };

                function tweenValue(transition, name, value) {
                    var id = transition._id;

                    transition.each(function() {
                        var schedule = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["e" /* set */ ])(this, id);
                        (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
                    });

                    return function(node) {
                        return __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["f" /* get */ ])(node, id).value[name];
                    };
                }


                /***/
            }),
            /* 9 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__define__ = __webpack_require__(10);
                /* harmony export (immutable) */
                __webpack_exports__["d"] = Color;
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "f", function() { return darker; });
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "e", function() { return brighter; });
                /* harmony export (immutable) */
                __webpack_exports__["a"] = color;
                /* harmony export (immutable) */
                __webpack_exports__["c"] = rgbConvert;
                /* harmony export (immutable) */
                __webpack_exports__["h"] = rgb;
                /* harmony export (immutable) */
                __webpack_exports__["b"] = Rgb;
                /* unused harmony export hslConvert */
                /* harmony export (immutable) */
                __webpack_exports__["g"] = hsl;


                function Color() {}

                var darker = 0.7;
                var brighter = 1 / darker;

                var reI = "\\s*([+-]?\\d+)\\s*",
                    reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
                    reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
                    reHex3 = /^#([0-9a-f]{3})$/,
                    reHex6 = /^#([0-9a-f]{6})$/,
                    reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
                    reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
                    reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
                    reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
                    reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
                    reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");

                var named = {
                    aliceblue: 0xf0f8ff,
                    antiquewhite: 0xfaebd7,
                    aqua: 0x00ffff,
                    aquamarine: 0x7fffd4,
                    azure: 0xf0ffff,
                    beige: 0xf5f5dc,
                    bisque: 0xffe4c4,
                    black: 0x000000,
                    blanchedalmond: 0xffebcd,
                    blue: 0x0000ff,
                    blueviolet: 0x8a2be2,
                    brown: 0xa52a2a,
                    burlywood: 0xdeb887,
                    cadetblue: 0x5f9ea0,
                    chartreuse: 0x7fff00,
                    chocolate: 0xd2691e,
                    coral: 0xff7f50,
                    cornflowerblue: 0x6495ed,
                    cornsilk: 0xfff8dc,
                    crimson: 0xdc143c,
                    cyan: 0x00ffff,
                    darkblue: 0x00008b,
                    darkcyan: 0x008b8b,
                    darkgoldenrod: 0xb8860b,
                    darkgray: 0xa9a9a9,
                    darkgreen: 0x006400,
                    darkgrey: 0xa9a9a9,
                    darkkhaki: 0xbdb76b,
                    darkmagenta: 0x8b008b,
                    darkolivegreen: 0x556b2f,
                    darkorange: 0xff8c00,
                    darkorchid: 0x9932cc,
                    darkred: 0x8b0000,
                    darksalmon: 0xe9967a,
                    darkseagreen: 0x8fbc8f,
                    darkslateblue: 0x483d8b,
                    darkslategray: 0x2f4f4f,
                    darkslategrey: 0x2f4f4f,
                    darkturquoise: 0x00ced1,
                    darkviolet: 0x9400d3,
                    deeppink: 0xff1493,
                    deepskyblue: 0x00bfff,
                    dimgray: 0x696969,
                    dimgrey: 0x696969,
                    dodgerblue: 0x1e90ff,
                    firebrick: 0xb22222,
                    floralwhite: 0xfffaf0,
                    forestgreen: 0x228b22,
                    fuchsia: 0xff00ff,
                    gainsboro: 0xdcdcdc,
                    ghostwhite: 0xf8f8ff,
                    gold: 0xffd700,
                    goldenrod: 0xdaa520,
                    gray: 0x808080,
                    green: 0x008000,
                    greenyellow: 0xadff2f,
                    grey: 0x808080,
                    honeydew: 0xf0fff0,
                    hotpink: 0xff69b4,
                    indianred: 0xcd5c5c,
                    indigo: 0x4b0082,
                    ivory: 0xfffff0,
                    khaki: 0xf0e68c,
                    lavender: 0xe6e6fa,
                    lavenderblush: 0xfff0f5,
                    lawngreen: 0x7cfc00,
                    lemonchiffon: 0xfffacd,
                    lightblue: 0xadd8e6,
                    lightcoral: 0xf08080,
                    lightcyan: 0xe0ffff,
                    lightgoldenrodyellow: 0xfafad2,
                    lightgray: 0xd3d3d3,
                    lightgreen: 0x90ee90,
                    lightgrey: 0xd3d3d3,
                    lightpink: 0xffb6c1,
                    lightsalmon: 0xffa07a,
                    lightseagreen: 0x20b2aa,
                    lightskyblue: 0x87cefa,
                    lightslategray: 0x778899,
                    lightslategrey: 0x778899,
                    lightsteelblue: 0xb0c4de,
                    lightyellow: 0xffffe0,
                    lime: 0x00ff00,
                    limegreen: 0x32cd32,
                    linen: 0xfaf0e6,
                    magenta: 0xff00ff,
                    maroon: 0x800000,
                    mediumaquamarine: 0x66cdaa,
                    mediumblue: 0x0000cd,
                    mediumorchid: 0xba55d3,
                    mediumpurple: 0x9370db,
                    mediumseagreen: 0x3cb371,
                    mediumslateblue: 0x7b68ee,
                    mediumspringgreen: 0x00fa9a,
                    mediumturquoise: 0x48d1cc,
                    mediumvioletred: 0xc71585,
                    midnightblue: 0x191970,
                    mintcream: 0xf5fffa,
                    mistyrose: 0xffe4e1,
                    moccasin: 0xffe4b5,
                    navajowhite: 0xffdead,
                    navy: 0x000080,
                    oldlace: 0xfdf5e6,
                    olive: 0x808000,
                    olivedrab: 0x6b8e23,
                    orange: 0xffa500,
                    orangered: 0xff4500,
                    orchid: 0xda70d6,
                    palegoldenrod: 0xeee8aa,
                    palegreen: 0x98fb98,
                    paleturquoise: 0xafeeee,
                    palevioletred: 0xdb7093,
                    papayawhip: 0xffefd5,
                    peachpuff: 0xffdab9,
                    peru: 0xcd853f,
                    pink: 0xffc0cb,
                    plum: 0xdda0dd,
                    powderblue: 0xb0e0e6,
                    purple: 0x800080,
                    rebeccapurple: 0x663399,
                    red: 0xff0000,
                    rosybrown: 0xbc8f8f,
                    royalblue: 0x4169e1,
                    saddlebrown: 0x8b4513,
                    salmon: 0xfa8072,
                    sandybrown: 0xf4a460,
                    seagreen: 0x2e8b57,
                    seashell: 0xfff5ee,
                    sienna: 0xa0522d,
                    silver: 0xc0c0c0,
                    skyblue: 0x87ceeb,
                    slateblue: 0x6a5acd,
                    slategray: 0x708090,
                    slategrey: 0x708090,
                    snow: 0xfffafa,
                    springgreen: 0x00ff7f,
                    steelblue: 0x4682b4,
                    tan: 0xd2b48c,
                    teal: 0x008080,
                    thistle: 0xd8bfd8,
                    tomato: 0xff6347,
                    turquoise: 0x40e0d0,
                    violet: 0xee82ee,
                    wheat: 0xf5deb3,
                    white: 0xffffff,
                    whitesmoke: 0xf5f5f5,
                    yellow: 0xffff00,
                    yellowgreen: 0x9acd32
                };

                __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__define__["a" /* default */ ])(Color, color, {
                    displayable: function() {
                        return this.rgb().displayable();
                    },
                    toString: function() {
                        return this.rgb() + "";
                    }
                });

                function color(format) {
                    var m;
                    format = (format + "").trim().toLowerCase();
                    return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00
                        :
                        (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
                        :
                        (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
                        :
                        (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
                        :
                        (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
                        :
                        (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
                        :
                        (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
                        :
                        (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
                        :
                        named.hasOwnProperty(format) ? rgbn(named[format]) :
                        format === "transparent" ? new Rgb(NaN, NaN, NaN, 0) :
                        null;
                }

                function rgbn(n) {
                    return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
                }

                function rgba(r, g, b, a) {
                    if (a <= 0) r = g = b = NaN;
                    return new Rgb(r, g, b, a);
                }

                function rgbConvert(o) {
                    if (!(o instanceof Color)) o = color(o);
                    if (!o) return new Rgb;
                    o = o.rgb();
                    return new Rgb(o.r, o.g, o.b, o.opacity);
                }

                function rgb(r, g, b, opacity) {
                    return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
                }

                function Rgb(r, g, b, opacity) {
                    this.r = +r;
                    this.g = +g;
                    this.b = +b;
                    this.opacity = +opacity;
                }

                __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__define__["a" /* default */ ])(Rgb, rgb, __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__define__["b" /* extend */ ])(Color, {
                    brighter: function(k) {
                        k = k == null ? brighter : Math.pow(brighter, k);
                        return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
                    },
                    darker: function(k) {
                        k = k == null ? darker : Math.pow(darker, k);
                        return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
                    },
                    rgb: function() {
                        return this;
                    },
                    displayable: function() {
                        return (0 <= this.r && this.r <= 255) &&
                            (0 <= this.g && this.g <= 255) &&
                            (0 <= this.b && this.b <= 255) &&
                            (0 <= this.opacity && this.opacity <= 1);
                    },
                    toString: function() {
                        var a = this.opacity;
                        a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
                        return (a === 1 ? "rgb(" : "rgba(") +
                            Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", " +
                            Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", " +
                            Math.max(0, Math.min(255, Math.round(this.b) || 0)) +
                            (a === 1 ? ")" : ", " + a + ")");
                    }
                }));

                function hsla(h, s, l, a) {
                    if (a <= 0) h = s = l = NaN;
                    else if (l <= 0 || l >= 1) h = s = NaN;
                    else if (s <= 0) h = NaN;
                    return new Hsl(h, s, l, a);
                }

                function hslConvert(o) {
                    if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
                    if (!(o instanceof Color)) o = color(o);
                    if (!o) return new Hsl;
                    if (o instanceof Hsl) return o;
                    o = o.rgb();
                    var r = o.r / 255,
                        g = o.g / 255,
                        b = o.b / 255,
                        min = Math.min(r, g, b),
                        max = Math.max(r, g, b),
                        h = NaN,
                        s = max - min,
                        l = (max + min) / 2;
                    if (s) {
                        if (r === max) h = (g - b) / s + (g < b) * 6;
                        else if (g === max) h = (b - r) / s + 2;
                        else h = (r - g) / s + 4;
                        s /= l < 0.5 ? max + min : 2 - max - min;
                        h *= 60;
                    } else {
                        s = l > 0 && l < 1 ? 0 : h;
                    }
                    return new Hsl(h, s, l, o.opacity);
                }

                function hsl(h, s, l, opacity) {
                    return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
                }

                function Hsl(h, s, l, opacity) {
                    this.h = +h;
                    this.s = +s;
                    this.l = +l;
                    this.opacity = +opacity;
                }

                __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__define__["a" /* default */ ])(Hsl, hsl, __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__define__["b" /* extend */ ])(Color, {
                    brighter: function(k) {
                        k = k == null ? brighter : Math.pow(brighter, k);
                        return new Hsl(this.h, this.s, this.l * k, this.opacity);
                    },
                    darker: function(k) {
                        k = k == null ? darker : Math.pow(darker, k);
                        return new Hsl(this.h, this.s, this.l * k, this.opacity);
                    },
                    rgb: function() {
                        var h = this.h % 360 + (this.h < 0) * 360,
                            s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
                            l = this.l,
                            m2 = l + (l < 0.5 ? l : 1 - l) * s,
                            m1 = 2 * l - m2;
                        return new Rgb(
                            hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
                            hsl2rgb(h, m1, m2),
                            hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
                            this.opacity
                        );
                    },
                    displayable: function() {
                        return (0 <= this.s && this.s <= 1 || isNaN(this.s)) &&
                            (0 <= this.l && this.l <= 1) &&
                            (0 <= this.opacity && this.opacity <= 1);
                    }
                }));

                /* From FvD 13.37, CSS Color Module Level 3 */
                function hsl2rgb(h, m1, m2) {
                    return (h < 60 ? m1 + (m2 - m1) * h / 60 :
                        h < 180 ? m2 :
                        h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 :
                        m1) * 255;
                }


                /***/
            }),
            /* 10 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony export (immutable) */
                __webpack_exports__["b"] = extend;
                /* harmony default export */
                __webpack_exports__["a"] = function(constructor, factory, prototype) {
                    constructor.prototype = factory.prototype = prototype;
                    prototype.constructor = constructor;
                };

                function extend(parent, definition) {
                    var prototype = Object.create(parent.prototype);
                    for (var key in definition) prototype[key] = definition[key];
                    return prototype;
                }


                /***/
            }),
            /* 11 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__src_value__ = __webpack_require__(13);
                /* unused harmony reexport interpolate */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__src_array__ = __webpack_require__(30);
                /* unused harmony reexport interpolateArray */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__src_basis__ = __webpack_require__(12);
                /* unused harmony reexport interpolateBasis */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_3__src_basisClosed__ = __webpack_require__(31);
                /* unused harmony reexport interpolateBasisClosed */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_4__src_date__ = __webpack_require__(33);
                /* unused harmony reexport interpolateDate */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_5__src_number__ = __webpack_require__(7);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "b", function() { return __WEBPACK_IMPORTED_MODULE_5__src_number__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_6__src_object__ = __webpack_require__(34);
                /* unused harmony reexport interpolateObject */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_7__src_round__ = __webpack_require__(74);
                /* unused harmony reexport interpolateRound */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_8__src_string__ = __webpack_require__(36);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "d", function() { return __WEBPACK_IMPORTED_MODULE_8__src_string__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_9__src_transform_index__ = __webpack_require__(76);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "a", function() { return __WEBPACK_IMPORTED_MODULE_9__src_transform_index__["a"]; });
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "e", function() { return __WEBPACK_IMPORTED_MODULE_9__src_transform_index__["b"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_10__src_zoom__ = __webpack_require__(78);
                /* unused harmony reexport interpolateZoom */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_11__src_rgb__ = __webpack_require__(35);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "c", function() { return __WEBPACK_IMPORTED_MODULE_11__src_rgb__["a"]; });
                /* unused harmony reexport interpolateRgbBasis */
                /* unused harmony reexport interpolateRgbBasisClosed */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_12__src_hsl__ = __webpack_require__(71);
                /* unused harmony reexport interpolateHsl */
                /* unused harmony reexport interpolateHslLong */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_13__src_lab__ = __webpack_require__(72);
                /* unused harmony reexport interpolateLab */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_14__src_hcl__ = __webpack_require__(70);
                /* unused harmony reexport interpolateHcl */
                /* unused harmony reexport interpolateHclLong */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_15__src_cubehelix__ = __webpack_require__(69);
                /* unused harmony reexport interpolateCubehelix */
                /* unused harmony reexport interpolateCubehelixLong */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_16__src_quantize__ = __webpack_require__(73);
                /* unused harmony reexport quantize */



















                /***/
            }),
            /* 12 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony export (immutable) */
                __webpack_exports__["b"] = basis;

                function basis(t1, v0, v1, v2, v3) {
                    var t2 = t1 * t1,
                        t3 = t2 * t1;
                    return ((1 - 3 * t1 + 3 * t2 - t3) * v0 +
                        (4 - 6 * t2 + 3 * t3) * v1 +
                        (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2 +
                        t3 * v3) / 6;
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(values) {
                    var n = values.length - 1;
                    return function(t) {
                        var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
                            v1 = values[i],
                            v2 = values[i + 1],
                            v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
                            v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
                        return basis((t - i / n) * n, v0, v1, v2, v3);
                    };
                };


                /***/
            }),
            /* 13 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_color__ = __webpack_require__(4);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__rgb__ = __webpack_require__(35);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__array__ = __webpack_require__(30);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_3__date__ = __webpack_require__(33);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_4__number__ = __webpack_require__(7);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_5__object__ = __webpack_require__(34);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_6__string__ = __webpack_require__(36);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_7__constant__ = __webpack_require__(32);









                /* harmony default export */
                __webpack_exports__["a"] = function(a, b) {
                    var t = typeof b,
                        c;
                    return b == null || t === "boolean" ? __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_7__constant__["a" /* default */ ])(b) :
                        (t === "number" ? __WEBPACK_IMPORTED_MODULE_4__number__["a" /* default */ ] :
                            t === "string" ? ((c = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["a" /* color */ ])(b)) ? (b = c, __WEBPACK_IMPORTED_MODULE_1__rgb__["a" /* default */ ]) : __WEBPACK_IMPORTED_MODULE_6__string__["a" /* default */ ]) :
                            b instanceof __WEBPACK_IMPORTED_MODULE_0_d3_color__["a" /* color */ ] ? __WEBPACK_IMPORTED_MODULE_1__rgb__["a" /* default */ ] :
                            b instanceof Date ? __WEBPACK_IMPORTED_MODULE_3__date__["a" /* default */ ] :
                            Array.isArray(b) ? __WEBPACK_IMPORTED_MODULE_2__array__["a" /* default */ ] :
                            isNaN(b) ? __WEBPACK_IMPORTED_MODULE_5__object__["a" /* default */ ] :
                            __WEBPACK_IMPORTED_MODULE_4__number__["a" /* default */ ])(a, b);
                };


                /***/
            }),
            /* 14 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__namespace__ = __webpack_require__(15);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__namespaces__ = __webpack_require__(16);



                function creatorInherit(name) {
                    return function() {
                        var document = this.ownerDocument,
                            uri = this.namespaceURI;
                        return uri === __WEBPACK_IMPORTED_MODULE_1__namespaces__["b" /* xhtml */ ] && document.documentElement.namespaceURI === __WEBPACK_IMPORTED_MODULE_1__namespaces__["b" /* xhtml */ ] ?
                            document.createElement(name) :
                            document.createElementNS(uri, name);
                    };
                }

                function creatorFixed(fullname) {
                    return function() {
                        return this.ownerDocument.createElementNS(fullname.space, fullname.local);
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name) {
                    var fullname = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__namespace__["a" /* default */ ])(name);
                    return (fullname.local ?
                        creatorFixed :
                        creatorInherit)(fullname);
                };


                /***/
            }),
            /* 15 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__namespaces__ = __webpack_require__(16);


                /* harmony default export */
                __webpack_exports__["a"] = function(name) {
                    var prefix = name += "",
                        i = prefix.indexOf(":");
                    if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
                    return __WEBPACK_IMPORTED_MODULE_0__namespaces__["a" /* default */ ].hasOwnProperty(prefix) ? { space: __WEBPACK_IMPORTED_MODULE_0__namespaces__["a" /* default */ ][prefix], local: name } : name;
                };


                /***/
            }),
            /* 16 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "b", function() { return xhtml; });
                var xhtml = "http://www.w3.org/1999/xhtml";

                /* harmony default export */
                __webpack_exports__["a"] = {
                    svg: "http://www.w3.org/2000/svg",
                    xhtml: xhtml,
                    xlink: "http://www.w3.org/1999/xlink",
                    xml: "http://www.w3.org/XML/1998/namespace",
                    xmlns: "http://www.w3.org/2000/xmlns/"
                };


                /***/
            }),
            /* 17 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function(node, event) {
                    var svg = node.ownerSVGElement || node;

                    if (svg.createSVGPoint) {
                        var point = svg.createSVGPoint();
                        point.x = event.clientX, point.y = event.clientY;
                        point = point.matrixTransform(node.getScreenCTM().inverse());
                        return [point.x, point.y];
                    }

                    var rect = node.getBoundingClientRect();
                    return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
                };


                /***/
            }),
            /* 18 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "a", function() { return event; });
                /* harmony export (immutable) */
                __webpack_exports__["b"] = customEvent;
                var filterEvents = {};

                var event = null;

                if (typeof document !== "undefined") {
                    var element = document.documentElement;
                    if (!("onmouseenter" in element)) {
                        filterEvents = { mouseenter: "mouseover", mouseleave: "mouseout" };
                    }
                }

                function filterContextListener(listener, index, group) {
                    listener = contextListener(listener, index, group);
                    return function(event) {
                        var related = event.relatedTarget;
                        if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
                            listener.call(this, event);
                        }
                    };
                }

                function contextListener(listener, index, group) {
                    return function(event1) {
                        var event0 = event; // Events can be reentrant (e.g., focus).
                        event = event1;
                        try {
                            listener.call(this, this.__data__, index, group);
                        } finally {
                            event = event0;
                        }
                    };
                }

                function parseTypenames(typenames) {
                    return typenames.trim().split(/^|\s+/).map(function(t) {
                        var name = "",
                            i = t.indexOf(".");
                        if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
                        return { type: t, name: name };
                    });
                }

                function onRemove(typename) {
                    return function() {
                        var on = this.__on;
                        if (!on) return;
                        for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
                            if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
                                this.removeEventListener(o.type, o.listener, o.capture);
                            } else {
                                on[++i] = o;
                            }
                        }
                        if (++i) on.length = i;
                        else delete this.__on;
                    };
                }

                function onAdd(typename, value, capture) {
                    var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
                    return function(d, i, group) {
                        var on = this.__on,
                            o, listener = wrap(value, i, group);
                        if (on)
                            for (var j = 0, m = on.length; j < m; ++j) {
                                if ((o = on[j]).type === typename.type && o.name === typename.name) {
                                    this.removeEventListener(o.type, o.listener, o.capture);
                                    this.addEventListener(o.type, o.listener = listener, o.capture = capture);
                                    o.value = value;
                                    return;
                                }
                            }
                        this.addEventListener(typename.type, listener, capture);
                        o = { type: typename.type, name: typename.name, value: value, listener: listener, capture: capture };
                        if (!on) this.__on = [o];
                        else on.push(o);
                    };
                }

                /* harmony default export */
                __webpack_exports__["c"] = function(typename, value, capture) {
                    var typenames = parseTypenames(typename + ""),
                        i, n = typenames.length,
                        t;

                    if (arguments.length < 2) {
                        var on = this.node().__on;
                        if (on)
                            for (var j = 0, m = on.length, o; j < m; ++j) {
                                for (i = 0, o = on[j]; i < n; ++i) {
                                    if ((t = typenames[i]).type === o.type && t.name === o.name) {
                                        return o.value;
                                    }
                                }
                            }
                        return;
                    }

                    on = value ? onAdd : onRemove;
                    if (capture == null) capture = false;
                    for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
                    return this;
                };

                function customEvent(event1, listener, that, args) {
                    var event0 = event;
                    event1.sourceEvent = event;
                    event = event1;
                    try {
                        return listener.apply(that, args);
                    } finally {
                        event = event0;
                    }
                }


                /***/
            }),
            /* 19 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";

                function none() {}

                /* harmony default export */
                __webpack_exports__["a"] = function(selector) {
                    return selector == null ? none : function() {
                        return this.querySelector(selector);
                    };
                };


                /***/
            }),
            /* 20 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__selection_on__ = __webpack_require__(18);


                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    var current = __WEBPACK_IMPORTED_MODULE_0__selection_on__["a" /* event */ ],
                        source;
                    while (source = current.sourceEvent) current = source;
                    return current;
                };


                /***/
            }),
            /* 21 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function(node) {
                    return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
                        ||
                        (node.document && node) // node is a Window
                        ||
                        node.defaultView; // node is a Document
                };


                /***/
            }),
            /* 22 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony export (immutable) */
                __webpack_exports__["c"] = now;
                /* harmony export (immutable) */
                __webpack_exports__["b"] = Timer;
                /* harmony export (immutable) */
                __webpack_exports__["a"] = timer;
                /* unused harmony export timerFlush */
                var frame = 0, // is an animation frame pending?
                    timeout = 0, // is a timeout pending?
                    interval = 0, // are any timers active?
                    pokeDelay = 1000, // how frequently we check for clock skew
                    taskHead,
                    taskTail,
                    clockLast = 0,
                    clockNow = 0,
                    clockSkew = 0,
                    clock = typeof performance === "object" && performance.now ? performance : Date,
                    setFrame = typeof requestAnimationFrame === "function" ? requestAnimationFrame : function(f) { setTimeout(f, 17); };

                function now() {
                    return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
                }

                function clearNow() {
                    clockNow = 0;
                }

                function Timer() {
                    this._call =
                        this._time =
                        this._next = null;
                }

                Timer.prototype = timer.prototype = {
                    constructor: Timer,
                    restart: function(callback, delay, time) {
                        if (typeof callback !== "function") throw new TypeError("callback is not a function");
                        time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
                        if (!this._next && taskTail !== this) {
                            if (taskTail) taskTail._next = this;
                            else taskHead = this;
                            taskTail = this;
                        }
                        this._call = callback;
                        this._time = time;
                        sleep();
                    },
                    stop: function() {
                        if (this._call) {
                            this._call = null;
                            this._time = Infinity;
                            sleep();
                        }
                    }
                };

                function timer(callback, delay, time) {
                    var t = new Timer;
                    t.restart(callback, delay, time);
                    return t;
                }

                function timerFlush() {
                    now(); // Get the current time, if not already set.
                    ++frame; // Pretend we’ve set an alarm, if we haven’t already.
                    var t = taskHead,
                        e;
                    while (t) {
                        if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
                        t = t._next;
                    }
                    --frame;
                }

                function wake() {
                    clockNow = (clockLast = clock.now()) + clockSkew;
                    frame = timeout = 0;
                    try {
                        timerFlush();
                    } finally {
                        frame = 0;
                        nap();
                        clockNow = 0;
                    }
                }

                function poke() {
                    var now = clock.now(),
                        delay = now - clockLast;
                    if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
                }

                function nap() {
                    var t0, t1 = taskHead,
                        t2, time = Infinity;
                    while (t1) {
                        if (t1._call) {
                            if (time > t1._time) time = t1._time;
                            t0 = t1, t1 = t1._next;
                        } else {
                            t2 = t1._next, t1._next = null;
                            t1 = t0 ? t0._next = t2 : taskHead = t2;
                        }
                    }
                    taskTail = t0;
                    sleep(time);
                }

                function sleep(time) {
                    if (frame) return; // Soonest alarm already set, or will be.
                    if (timeout) timeout = clearTimeout(timeout);
                    var delay = time - clockNow;
                    if (delay > 24) {
                        if (time < Infinity) timeout = setTimeout(wake, delay);
                        if (interval) interval = clearInterval(interval);
                    } else {
                        if (!interval) clockLast = clockNow, interval = setInterval(poke, pokeDelay);
                        frame = 1, setFrame(wake);
                    }
                }


                /***/
            }),
            /* 23 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });

                var _slicedToArray = function() {
                    function sliceIterator(arr, i) {
                        var _arr = [];
                        var _n = true;
                        var _d = false;
                        var _e = undefined;
                        try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) {
                            _d = true;
                            _e = err;
                        } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } }
                        return _arr;
                    }
                    return function(arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } };
                }();

                var _createClass = function() {
                    function defineProperties(target, props) {
                        for (var i = 0; i < props.length; i++) {
                            var descriptor = props[i];
                            descriptor.enumerable = descriptor.enumerable || false;
                            descriptor.configurable = true;
                            if ("value" in descriptor) descriptor.writable = true;
                            Object.defineProperty(target, descriptor.key, descriptor);
                        }
                    }
                    return function(Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; };
                }();

                var _lodash = __webpack_require__(5);

                var _heap = __webpack_require__(45);

                var _heap2 = _interopRequireDefault(_heap);

                var _RawGraph = __webpack_require__(50);

                var _RawGraph2 = _interopRequireDefault(_RawGraph);

                function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

                function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

                var DEFAULT_NODE_COUNT = 150;

                function growSeq(seq, terms, minSupport, maxSupport, itemset) {
                    /* find the next frequent sequence by inserting a new word to current sequence */
                    var pos = -1;
                    var word = null;
                    var count = 0;
                    var len = seq.words.length;

                    var _loop = function _loop(s) {
                        var fdist = {};
                        seq.DBs.forEach(function(t) {
                            var l = s === 0 ? 0 : t.seqIndices[s - 1] + 1;
                            var r = s === len ? t.tokens.length : t.seqIndices[s];
                            var duplicate = {};
                            for (var _i = l; _i < r; _i++) {
                                var w = t.tokens[_i];

                                if (duplicate[w]) continue;
                                duplicate[w] = true;

                                if (w in fdist) {
                                    fdist[w] += t.count;
                                } else {
                                    fdist[w] = t.count;
                                }
                            }
                        });

                        var maxw = null;
                        var maxc = 0;

                        var isNotRoot = len > 0;
                        var words = isNotRoot ? Object.keys(fdist) : Object.keys(fdist).filter(function(w) {
                            return !itemset[w].startsWith('#');
                        });

                        words.forEach(function(w) {
                            var value = fdist[w];
                            //if (value < maxSupport && (value / Math.max(idfTable[itemset[w]], idfBase)) * idfBase > maxc) {
                            //if (value < maxSupport && value > maxc && (stopwords.indexOf(itemset[w]) < 0 || isNotRoot)) {
                            if (value < maxSupport && value > maxc && stopwords.indexOf(itemset[w]) < 0) {
                                maxw = +w;
                                //maxc = (value / Math.max(idfTable[itemset[w]], idfBase)) * idfBase
                                maxc = value
                            }
                        });
                        console.log(itemset)

                        if (maxc > count) {
                            pos = s;
                            word = maxw;
                            count = maxc;
                        }
                    };

                    for (var s = 0; s <= len; s++) {
                        _loop(s);
                    }

                    var s0 = null;
                    var s1 = null;

                    /* split the current group in two */
                    if (count >= minSupport) {
                        s0 = { size: 0, DBs: [] };
                        s1 = { size: 0, DBs: [] };
                        var words = seq.words;
                        for (var ti = 0; ti < seq.DBs.length; ti++) {
                            var t = seq.DBs[ti];
                            var l = pos === 0 ? 0 : t.seqIndices[pos - 1] + 1;
                            var r = pos === words.length ? t.tokens.length : t.seqIndices[pos];
                            var i = t.tokens.slice(l, r).indexOf(word);
                            if (i < 0) {
                                s0.DBs.push(t);
                                s0.size += t.count;
                            } else {
                                i += l;
                                t.seqIndices.splice(pos, 0, i);
                                s1.DBs.push(t);
                                s1.size += t.count;
                            }
                        }
                    }
                    console.log({ 's0': s0, 's1': s1 })
                    return { word: word, pos: pos, count: count, s0: s0, s1: s1 };
                }

                function expandSeqTree(rootSeq, graphs, expandCnt, minSupport, maxSupport, terms, itemset) {
                    if (rootSeq.words && rootSeq.words.length > 0) {
                        rootSeq.graph.nodes = rootSeq.graph.nodes.concat(rootSeq.words);
                        expandCnt -= rootSeq.words.length;
                    }


                    /* Create a max heap */
                    var seqs = new _heap2.default(function(a, b) {
                        return b.size - a.size;
                    });
                    seqs.push(rootSeq);
                    var leafSeqs = [];

                    console.log(JSON.parse(JSON.stringify(seqs)))

                    while (!seqs.empty() && expandCnt > 0) {
                        /* find the candidate sequence with largest support DB */
                        var s = seqs.pop();
                        console.log({ 's': s, 'seqs': seqs })
                        var graph = s.graph;
                        var s0 = s.r;
                        var s1 = s.l;

                        if (!s0 && !s1) {
                            /* find the next frequent sequence */
                            var result = growSeq(s, terms, minSupport, maxSupport, itemset);
                            console.log(result)
                            s0 = result.s0;
                            s1 = result.s1;
                            var word = result.word,
                                pos = result.pos,
                                count = result.count;


                            if (count < minSupport) {
                                leafSeqs.push(s);
                            } else {
                                /* create new sequences and add new word */
                                if (!graph) {
                                    graph = new _RawGraph2.default(minSupport, maxSupport);
                                    graphs.push(graph);
                                }
                                var newWord = {
                                    id: graph.totalNodeCnt++,
                                    entity: itemset[word],
                                    freq: count,
                                    topEntries: s1.DBs.slice(0, 5),
                                    seq: s1
                                };
                                var newWords = s.words.slice();
                                newWords.splice(pos, 0, newWord);
                                s0.words = s.words;
                                s1.words = newWords;
                                s1.newWord = newWord;
                                s0.graph = s.graph;
                                s1.graph = graph;
                            }
                        }

                        if (s1) {
                            s1.graph.nodes.push(s1.newWord);
                            expandCnt--;
                        }

                        /* add new sequences to seqTree */
                        s.l = s1;
                        s.r = s0;

                        /* add new sequences to candidates */
                        if (s1) {
                            seqs.push(s1);
                        }
                        if (s0 && s0.size >= minSupport) {
                            seqs.push(s0);
                        }
                    }

                    return leafSeqs.concat(seqs.toArray());
                }

                function updateNodesEdges(graphs, leafSeqs) {
                    leafSeqs.filter(function(seq) {
                        return graphs.indexOf(seq.graph) >= 0;
                    }).forEach(function(seq) {
                        var words = seq.words;
                        var linkadj = seq.graph.linkadj;
                        //printSeq(seq);
                        for (var i = 0; i < words.length - 1; i++) {
                            var word = words[i];
                            var id = word.id;
                            var nextId = words[i + 1].id;

                            if (!(id in linkadj)) linkadj[id] = {};

                            if (nextId in linkadj[id]) {
                                linkadj[id][nextId] += seq.size;
                            } else {
                                linkadj[id][nextId] = seq.size;
                            }
                        }

                        words.filter(function(word) {
                            return !word.leafSeq || word.leafSeq < seq.size;
                        }).forEach(function(word) {
                            word.leafSeq = seq;
                        });
                    });
                }

                function printSeq(words) {
                    var str = words.map(function(w) {
                        return w.entity;
                    }).join(' ');
                    console.log(str);
                }

                var SentenTreeModel = function() {
                    function SentenTreeModel(tokenizedData) {
                        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

                        _classCallCheck(this, SentenTreeModel);

                        // extract options
                        var _options$termWeights = options.termWeights,
                            termWeights = _options$termWeights === undefined ? {} : _options$termWeights,
                            _options$minSupportCo = options.minSupportCount,
                            minSupportCount = _options$minSupportCo === undefined ? 2 : _options$minSupportCo,
                            _options$minSupportRa = options.minSupportRatio,
                            minSupportRatio = _options$minSupportRa === undefined ? 0.001 : _options$minSupportRa,
                            _options$maxSupportRa = options.maxSupportRatio,
                            maxSupportRatio = _options$maxSupportRa === undefined ? 0.75 : _options$maxSupportRa;


                        this.options = options;

                        var itemset = tokenizedData.itemset,
                            entries = tokenizedData.entries;

                        this.tokenizedData = tokenizedData;
                        this.terms = tokenizedData.encodeTermWeights(termWeights);
                        var size = tokenizedData.computeSize();

                        this.supportRange = [Math.max(size * minSupportRatio, minSupportCount), size * maxSupportRatio];
                        console.log(this.supportRange)

                        var _supportRange = _slicedToArray(this.supportRange, 2),
                            minSupport = _supportRange[0],
                            maxSupport = _supportRange[1];

                        this.rootSeq = {
                            words: [],
                            newWord: null,
                            graph: null,
                            size: size,
                            DBs: entries
                        };

                        var graphs = [];
                        var visibleGroups = expandSeqTree(this.rootSeq, graphs, DEFAULT_NODE_COUNT, minSupport, maxSupport, this.terms, itemset);


                        this.graphs = graphs.filter(function(g) {
                            return g.nodes.length > 2;
                        }).slice(0, 10);
                        updateNodesEdges(this.graphs, visibleGroups);
                    }

                    _createClass(SentenTreeModel, [{
                        key: 'updateGraphs',
                        value: function updateGraphs(newRootSeq) {
                            this.graphs.forEach(function(g) {
                                return g.clear();
                            });
                            var rootSeq = newRootSeq || this.rootSeq;

                            var _supportRange2 = _slicedToArray(this.supportRange, 2),
                                minSupport = _supportRange2[0],
                                maxSupport = _supportRange2[1];

                            var visibleGroups = expandSeqTree(rootSeq, this.graphs, DEFAULT_NODE_COUNT, minSupport, maxSupport, this.terms, this.tokenizedData.itemset);

                            updateNodesEdges(this.graphs, visibleGroups);
                            return this;
                        }
                    }, {
                        key: 'size',
                        value: function size() {
                            return this.rootSeq.size;
                        }
                    }, {
                        key: 'getRenderedGraphs',
                        value: function getRenderedGraphs(limit) {
                            var graphs = arguments.length === 1 ? this.graphs.slice(0, limit) : this.graphs;
                            console.log("slice")
                            var renderedGraphs = graphs.map(function(g) {
                                return g.toRenderedGraph();
                            });
                            console.log("toRenderedGraph")
                            var globalFreqRange = [(0, _lodash.min)(renderedGraphs.map(function(g) {
                                return g.freqRange[0];
                            })), (0, _lodash.max)(renderedGraphs.map(function(g) {
                                return g.freqRange[1];
                            }))];
                            var idPool = 0;
                            renderedGraphs.forEach(function(g) {
                                g.globalFreqRange = globalFreqRange;
                                g.nodes.forEach(function(n) {
                                    n.gid = idPool;
                                    idPool++;
                                });
                            });
                            return renderedGraphs;
                        }
                    }]);

                    return SentenTreeModel;
                }();

                exports.default = SentenTreeModel;

                /***/
            }),
            /* 24 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });

                var _createClass = function() {
                    function defineProperties(target, props) {
                        for (var i = 0; i < props.length; i++) {
                            var descriptor = props[i];
                            descriptor.enumerable = descriptor.enumerable || false;
                            descriptor.configurable = true;
                            if ("value" in descriptor) descriptor.writable = true;
                            Object.defineProperty(target, descriptor.key, descriptor);
                        }
                    }
                    return function(Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; };
                }();

                var _lodash = __webpack_require__(5);

                function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

                var NLTK_STOP_WORDS = ['i', 'me', 'my', 'myself', 'we', 'our', 'ours', 'ourselves', 'you', 'your', 'yours', 'yourself', 'yourselves', 'he', 'him', 'his', 'himself', 'she', 'her', 'hers', 'herself', 'it', 'its', 'itself', 'they', 'them', 'their', 'theirs', 'themselves', 'what', 'which', 'who', 'whom', 'this', 'that', 'these', 'those', 'am', 'is', 'are', 'was', 'were', 'be', 'been', 'being', 'have', 'has', 'had', 'having', 'do', 'does', 'did', 'doing', 'a', 'an', 'the', 'and', 'but', 'if', 'or', 'because', 'as', 'until', 'while', 'of', 'at', 'by', 'for', 'with', 'about', 'against', 'between', 'into', 'through', 'during', 'before', 'after', 'above', 'below', 'to', 'from', 'up', 'down', 'in', 'out', 'on', 'off', 'over', 'under', 'again', 'further', 'then', 'once', 'here', 'there', 'when', 'where', 'why', 'how', 'all', 'any', 'both', 'each', 'few', 'more', 'most', 'other', 'some', 'such', 'nor', 'only', 'same', 'so', 'than', 'too', 'very', 's', 't', 'can', 'will', 'just', 'don', 'should', 'now']; // removed 'own', 'not', 'no' from stopwords

                var CUSTOM_STOP_WORDS = ['de', 'la', 'y', 'un', 'que', 'en', 'el', 'shit', 'fuck', 'fucking']; // spanish
                var TWEET_STOP_WORDS = ['rt', 'via', 'amp', 'http', 'https', 'm', 're', 'co'];
                var DEFAULT_STOP_WORDS = (0, _lodash.uniq)(NLTK_STOP_WORDS.concat(CUSTOM_STOP_WORDS).concat(TWEET_STOP_WORDS));

                var WordFilter = function() {
                    function WordFilter() {
                        var _this = this;

                        var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
                            _ref$includeWords = _ref.includeWords,
                            includeWords = _ref$includeWords === undefined ? [] : _ref$includeWords,
                            _ref$excludeWords = _ref.excludeWords,
                            excludeWords = _ref$excludeWords === undefined ? [] : _ref$excludeWords,
                            _ref$includeDefault = _ref.includeDefault,
                            includeDefault = _ref$includeDefault === undefined ? true : _ref$includeDefault;

                        _classCallCheck(this, WordFilter);

                        this.stopWords = includeDefault ? DEFAULT_STOP_WORDS : [];
                        if (includeWords && includeWords.length > 0) {
                            this.stopWords = (0, _lodash.uniq)(this.stopWords.concat(includeWords));
                        }
                        if (excludeWords && excludeWords.length > 0) {
                            (function() {
                                var exclusionLookup = (0, _lodash.keyBy)(excludeWords, function(w) {
                                    return w;
                                });
                                _this.stopWords = _this.stopWords.filter(function(w) {
                                    return !exclusionLookup[w];
                                });
                            })();
                        }
                        this.regex = new RegExp('^(' + this.stopWords.join('|') + ')$');
                    }

                    _createClass(WordFilter, [{
                        key: 'test',
                        value: function test(word) {
                            return this.regex.test(word);
                        }
                    }]);

                    return WordFilter;
                }();

                exports.default = WordFilter;


                var defaultFilter = null;
                WordFilter.getDefault = function() {
                    if (!defaultFilter) {
                        defaultFilter = new WordFilter();
                    }
                    return defaultFilter;
                };

                /***/
            }),
            /* 25 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });
                exports.tokenize = tokenize;
                exports.tokenizeBySpace = tokenizeBySpace;
                var PATTERN = /http:\/\/t\.co\/\w+|http:\/\/vine\.co\/\w+|http:\/\/t\.co\w+|http:\/\/vine\.co\w+|http:\/\/t\.\w+|http:\/\/vine\.\w+|http:\/\/\w+|\@\w+|\#\w+|\d+(,\d+)+|\w+(-\w+)*|\$?\d+(\.\d+)?\%?|([A-Za-z]\.)+/g;

                function tokenize(text) {
                    var tokens = [];
                    PATTERN.lastIndex = 0;
                    var tokenResult = PATTERN.exec(text);
                    while (tokenResult != null) {
                        tokens.push(tokenResult[0].trim());
                        tokenResult = PATTERN.exec(text);
                    }
                    return tokens;
                }

                function tokenizeBySpace(text) {
                    return text.split(' ').filter(function(x) {
                        return x.length > 0;
                    });
                }

                /***/
            }),
            /* 26 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });

                var _createClass = function() {
                    function defineProperties(target, props) {
                        for (var i = 0; i < props.length; i++) {
                            var descriptor = props[i];
                            descriptor.enumerable = descriptor.enumerable || false;
                            descriptor.configurable = true;
                            if ("value" in descriptor) descriptor.writable = true;
                            Object.defineProperty(target, descriptor.key, descriptor);
                        }
                    }
                    return function(Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; };
                }();

                function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

                var Link = function() {
                    function Link(sourceNode, targetNode, freq) {
                        _classCallCheck(this, Link);

                        this.source = sourceNode;
                        this.target = targetNode;
                        this.freq = freq;
                        this.attachPoints = {
                            x1: 0,
                            y1: 0,
                            x2: 1,
                            y2: 1
                        };
                    }

                    _createClass(Link, [{
                        key: 'getKey',
                        value: function getKey() {
                            return [this.source.id, this.target.id].join(',');
                        }
                    }, {
                        key: 'isTheOnlyBridge',
                        value: function isTheOnlyBridge() {
                            return this.source.rightLinks.length === 1 && this.target.leftLinks.length === 1;
                        }
                    }, {
                        key: 'toConstraint',
                        value: function toConstraint() {
                            var gap = this.isTheOnlyBridge() ? 5 : 15;
                            return {
                                axis: 'x',
                                left: this.source.id,
                                right: this.target.id,
                                gap: (this.source.width + this.target.width) / 2 + gap
                            };
                        }
                    }, {
                        key: 'toOnlyBridgeConstraint',
                        value: function toOnlyBridgeConstraint() {
                            return {
                                type: 'alignment',
                                axis: 'y',
                                offsets: [{ node: this.source.id, offset: 0 }, { node: this.target.id, offset: 0 }]
                            };
                        }
                    }]);

                    return Link;
                }();

                exports.default = Link;

                /***/
            }),
            /* 27 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });

                var _createClass = function() {
                    function defineProperties(target, props) {
                        for (var i = 0; i < props.length; i++) {
                            var descriptor = props[i];
                            descriptor.enumerable = descriptor.enumerable || false;
                            descriptor.configurable = true;
                            if ("value" in descriptor) descriptor.writable = true;
                            Object.defineProperty(target, descriptor.key, descriptor);
                        }
                    }
                    return function(Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; };
                }();

                var _lodash = __webpack_require__(5);

                function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

                var Node = function() {
                    function Node(rawNode) {
                        _classCallCheck(this, Node);

                        this.data = rawNode;
                        this.leftLinks = [];
                        this.rightLinks = [];

                        this.id = -1;
                        this.x = 0;
                        this.y = 0;
                        this.width = 50;
                        this.height = 18;
                    }

                    _createClass(Node, [{
                        key: 'isLeaf',
                        value: function isLeaf() {
                            return this.leftLinks.length === 0 || this.rightLinks.length === 0;
                        }
                    }, {
                        key: 'isLeftLeaf',
                        value: function isLeftLeaf() {
                            return this.leftLinks.length === 0;
                        }
                    }, {
                        key: 'isRightLeaf',
                        value: function isRightLeaf() {
                            return this.rightLinks.length === 0;
                        }
                    }, {
                        key: 'leftEdge',
                        value: function leftEdge() {
                            return this.x - this.width / 2;
                        }
                    }, {
                        key: 'rightEdge',
                        value: function rightEdge() {
                            return this.x + this.width / 2;
                        }
                    }, {
                        key: 'getLeftNodes',
                        value: function getLeftNodes() {
                            return this.leftLinks.map(function(l) {
                                return l.source;
                            });
                        }
                    }, {
                        key: 'getRightNodes',
                        value: function getRightNodes() {
                            return this.rightLinks.map(function(l) {
                                return l.target;
                            });
                        }
                    }, {
                        key: 'createAlignmentConstraints',
                        value: function createAlignmentConstraints(axis, nodes) {
                            return nodes.length > 1 ? {
                                type: 'alignment',
                                axis: axis,
                                offsets: nodes.map(function(n) {
                                    return { node: n.id, offset: 0 };
                                })
                            } : null;
                        }
                    }, {
                        key: 'computeLeftConstraints',
                        value: function computeLeftConstraints() {
                            var nodes = this.getLeftNodes().filter(function(n) {
                                return n.rightLinks.length === 1;
                            });

                            return this.createAlignmentConstraints('x', nodes);
                        }
                    }, {
                        key: 'computeRightConstraints',
                        value: function computeRightConstraints() {
                            var nodes = this.getRightNodes().filter(function(n) {
                                return n.leftLinks.length === 1;
                            });

                            return this.createAlignmentConstraints('x', nodes);
                        }
                    }, {
                        key: 'computeOrderConstraints',
                        value: function computeOrderConstraints() {
                            var rules = [];

                            if (this.getRightNodes().length > 1) {
                                var nodes = this.getRightNodes();
                                for (var i = 1; i < nodes.length; i++) {
                                    rules.push({
                                        axis: 'y',
                                        left: nodes[i - 1].id,
                                        right: nodes[i].id,
                                        gap: 5
                                    });
                                }
                            }
                            if (this.getLeftNodes().length > 1) {
                                var _nodes = this.getLeftNodes();
                                for (var _i = 1; _i < _nodes.length; _i++) {
                                    rules.push({
                                        axis: 'y',
                                        left: _nodes[_i - 1].id,
                                        right: _nodes[_i].id,
                                        gap: 5
                                    });
                                }
                            }

                            return rules;
                        }
                    }, {
                        key: 'updateAttachPoints',
                        value: function updateAttachPoints() {
                            var _this = this;

                            if (this.leftLinks.length === 1) {
                                this.leftLinks[0].attachPoints.y2 = this.y;
                            } else if (this.leftLinks.length > 1) {
                                (function() {
                                    var totalLeft = (0, _lodash.sum)(_this.leftLinks.map(function(l) {
                                        return l.strokeWidth;
                                    }));
                                    var startPos = _this.y - (totalLeft + (_this.leftLinks.length - 1) * 2) / 2;
                                    _this.leftLinks.concat().sort(function(a, b) {
                                        return a.source.y - b.source.y;
                                    }).forEach(function(link) {
                                        link.attachPoints.y2 = startPos + link.strokeWidth / 2;
                                        startPos += link.strokeWidth + 2;
                                    });
                                })();
                            }

                            if (this.rightLinks.length === 1) {
                                this.rightLinks[0].attachPoints.y1 = this.y;
                            } else if (this.rightLinks.length > 1) {
                                (function() {
                                    var totalRight = (0, _lodash.sum)(_this.rightLinks.map(function(l) {
                                        return l.strokeWidth;
                                    }));
                                    var startPos = _this.y - (totalRight + (_this.rightLinks.length - 1) * 2) / 2;
                                    _this.rightLinks.concat().sort(function(a, b) {
                                        return a.target.y - b.target.y;
                                    }).forEach(function(link) {
                                        link.attachPoints.y1 = startPos + link.strokeWidth / 2;
                                        startPos += link.strokeWidth + 2;
                                    });
                                })();
                            }
                        }
                    }, {
                        key: 'canMerge',
                        value: function canMerge(node) {
                            return this.data.entity === node.data.entity;
                        }
                    }], [{
                        key: 'merge',
                        value: function merge(nodes) {
                            return new Node({
                                id: (0, _lodash.min)(nodes.map(function(n) {
                                    return n.data.id;
                                })),
                                entity: nodes[0].data.entity,
                                freq: (0, _lodash.sum)(nodes.map(function(n) {
                                    return n.data.freq;
                                })),
                                mergedData: nodes.map(function(n) {
                                    return n.data;
                                }),
                                topEntries: nodes.reduce(function(acc, curr) {
                                    return acc.concat(curr.data.topEntries);
                                }, []).slice(0, 5)
                            });
                        }
                    }]);

                    return Node;
                }();

                exports.default = Node;

                /***/
            }),
            /* 28 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "b", function() { return deg2rad; });
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "a", function() { return rad2deg; });
                var deg2rad = Math.PI / 180;
                var rad2deg = 180 / Math.PI;


                /***/
            }),
            /* 29 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                Object.defineProperty(__webpack_exports__, "__esModule", { value: true });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__src_dispatch__ = __webpack_require__(57);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "dispatch", function() { return __WEBPACK_IMPORTED_MODULE_0__src_dispatch__["a"]; });



                /***/
            }),
            /* 30 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__value__ = __webpack_require__(13);


                /* harmony default export */
                __webpack_exports__["a"] = function(a, b) {
                    var nb = b ? b.length : 0,
                        na = a ? Math.min(nb, a.length) : 0,
                        x = new Array(nb),
                        c = new Array(nb),
                        i;

                    for (i = 0; i < na; ++i) x[i] = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__value__["a" /* default */ ])(a[i], b[i]);
                    for (; i < nb; ++i) c[i] = b[i];

                    return function(t) {
                        for (i = 0; i < na; ++i) c[i] = x[i](t);
                        return c;
                    };
                };


                /***/
            }),
            /* 31 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__basis__ = __webpack_require__(12);


                /* harmony default export */
                __webpack_exports__["a"] = function(values) {
                    var n = values.length;
                    return function(t) {
                        var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
                            v0 = values[(i + n - 1) % n],
                            v1 = values[i % n],
                            v2 = values[(i + 1) % n],
                            v3 = values[(i + 2) % n];
                        return __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__basis__["b" /* basis */ ])((t - i / n) * n, v0, v1, v2, v3);
                    };
                };


                /***/
            }),
            /* 32 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function(x) {
                    return function() {
                        return x;
                    };
                };


                /***/
            }),
            /* 33 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function(a, b) {
                    var d = new Date;
                    return a = +a, b -= a,
                        function(t) {
                            return d.setTime(a + b * t), d;
                        };
                };


                /***/
            }),
            /* 34 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__value__ = __webpack_require__(13);


                /* harmony default export */
                __webpack_exports__["a"] = function(a, b) {
                    var i = {},
                        c = {},
                        k;

                    if (a === null || typeof a !== "object") a = {};
                    if (b === null || typeof b !== "object") b = {};

                    for (k in b) {
                        if (k in a) {
                            i[k] = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__value__["a" /* default */ ])(a[k], b[k]);
                        } else {
                            c[k] = b[k];
                        }
                    }

                    return function(t) {
                        for (k in i) c[k] = i[k](t);
                        return c;
                    };
                };


                /***/
            }),
            /* 35 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_color__ = __webpack_require__(4);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__basis__ = __webpack_require__(12);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__basisClosed__ = __webpack_require__(31);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_3__color__ = __webpack_require__(6);
                /* unused harmony export rgbBasis */
                /* unused harmony export rgbBasisClosed */





                /* harmony default export */
                __webpack_exports__["a"] = (function rgbGamma(y) {
                    var color = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_3__color__["c" /* gamma */ ])(y);

                    function rgb(start, end) {
                        var r = color((start = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["f" /* rgb */ ])(start)).r, (end = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["f" /* rgb */ ])(end)).r),
                            g = color(start.g, end.g),
                            b = color(start.b, end.b),
                            opacity = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_3__color__["a" /* default */ ])(start.opacity, end.opacity);
                        return function(t) {
                            start.r = r(t);
                            start.g = g(t);
                            start.b = b(t);
                            start.opacity = opacity(t);
                            return start + "";
                        };
                    }

                    rgb.gamma = rgbGamma;

                    return rgb;
                })(1);

                function rgbSpline(spline) {
                    return function(colors) {
                        var n = colors.length,
                            r = new Array(n),
                            g = new Array(n),
                            b = new Array(n),
                            i, color;
                        for (i = 0; i < n; ++i) {
                            color = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["f" /* rgb */ ])(colors[i]);
                            r[i] = color.r || 0;
                            g[i] = color.g || 0;
                            b[i] = color.b || 0;
                        }
                        r = spline(r);
                        g = spline(g);
                        b = spline(b);
                        color.opacity = 1;
                        return function(t) {
                            color.r = r(t);
                            color.g = g(t);
                            color.b = b(t);
                            return color + "";
                        };
                    };
                }

                var rgbBasis = rgbSpline(__WEBPACK_IMPORTED_MODULE_1__basis__["a" /* default */ ]);
                var rgbBasisClosed = rgbSpline(__WEBPACK_IMPORTED_MODULE_2__basisClosed__["a" /* default */ ]);


                /***/
            }),
            /* 36 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__number__ = __webpack_require__(7);


                var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
                    reB = new RegExp(reA.source, "g");

                function zero(b) {
                    return function() {
                        return b;
                    };
                }

                function one(b) {
                    return function(t) {
                        return b(t) + "";
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(a, b) {
                    var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
                        am, // current match in a
                        bm, // current match in b
                        bs, // string preceding current number in b, if any
                        i = -1, // index in s
                        s = [], // string constants and placeholders
                        q = []; // number interpolators

                    // Coerce inputs to strings.
                    a = a + "", b = b + "";

                    // Interpolate pairs of numbers in a & b.
                    while ((am = reA.exec(a)) &&
                        (bm = reB.exec(b))) {
                        if ((bs = bm.index) > bi) { // a string precedes the next number in b
                            bs = b.slice(bi, bs);
                            if (s[i]) s[i] += bs; // coalesce with previous string
                            else s[++i] = bs;
                        }
                        if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
                            if (s[i]) s[i] += bm; // coalesce with previous string
                            else s[++i] = bm;
                        } else { // interpolate non-matching numbers
                            s[++i] = null;
                            q.push({ i: i, x: __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__number__["a" /* default */ ])(am, bm) });
                        }
                        bi = reB.lastIndex;
                    }

                    // Add remains of b.
                    if (bi < b.length) {
                        bs = b.slice(bi);
                        if (s[i]) s[i] += bs; // coalesce with previous string
                        else s[++i] = bs;
                    }

                    // Special optimization for only a single match.
                    // Otherwise, interpolate each of the numbers and rejoin the string.
                    return s.length < 2 ? (q[0] ?
                            one(q[0].x) :
                            zero(b)) :
                        (b = q.length, function(t) {
                            for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
                            return s.join("");
                        });
                };


                /***/
            }),
            /* 37 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                var matcher = function(selector) {
                    return function() {
                        return this.matches(selector);
                    };
                };

                if (typeof document !== "undefined") {
                    var element = document.documentElement;
                    if (!element.matches) {
                        var vendorMatches = element.webkitMatchesSelector ||
                            element.msMatchesSelector ||
                            element.mozMatchesSelector ||
                            element.oMatchesSelector;
                        matcher = function(selector) {
                            return function() {
                                return vendorMatches.call(this, selector);
                            };
                        };
                    }
                }

                /* harmony default export */
                __webpack_exports__["a"] = matcher;


                /***/
            }),
            /* 38 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__sparse__ = __webpack_require__(39);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__index__ = __webpack_require__(0);
                /* harmony export (immutable) */
                __webpack_exports__["b"] = EnterNode;



                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    return new __WEBPACK_IMPORTED_MODULE_1__index__["b" /* Selection */ ](this._enter || this._groups.map(__WEBPACK_IMPORTED_MODULE_0__sparse__["a" /* default */ ]), this._parents);
                };

                function EnterNode(parent, datum) {
                    this.ownerDocument = parent.ownerDocument;
                    this.namespaceURI = parent.namespaceURI;
                    this._next = null;
                    this._parent = parent;
                    this.__data__ = datum;
                }

                EnterNode.prototype = {
                    constructor: EnterNode,
                    appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
                    insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
                    querySelector: function(selector) { return this._parent.querySelector(selector); },
                    querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
                };


                /***/
            }),
            /* 39 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function(update) {
                    return new Array(update.length);
                };


                /***/
            }),
            /* 40 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";

                function empty() {
                    return [];
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(selector) {
                    return selector == null ? empty : function() {
                        return this.querySelectorAll(selector);
                    };
                };


                /***/
            }),
            /* 41 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__src_timer__ = __webpack_require__(22);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "c", function() { return __WEBPACK_IMPORTED_MODULE_0__src_timer__["c"]; });
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "a", function() { return __WEBPACK_IMPORTED_MODULE_0__src_timer__["a"]; });
                /* unused harmony reexport timerFlush */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__src_timeout__ = __webpack_require__(114);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "b", function() { return __WEBPACK_IMPORTED_MODULE_1__src_timeout__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__src_interval__ = __webpack_require__(113);
                /* unused harmony reexport interval */







                /***/
            }),
            /* 42 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__transition_schedule__ = __webpack_require__(1);


                /* harmony default export */
                __webpack_exports__["a"] = function(node, name) {
                    var schedules = node.__transition,
                        schedule,
                        active,
                        empty = true,
                        i;

                    if (!schedules) return;

                    name = name == null ? null : name + "";

                    for (i in schedules) {
                        if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
                        active = schedule.state > __WEBPACK_IMPORTED_MODULE_0__transition_schedule__["a" /* STARTING */ ] && schedule.state < __WEBPACK_IMPORTED_MODULE_0__transition_schedule__["b" /* ENDING */ ];
                        schedule.state = __WEBPACK_IMPORTED_MODULE_0__transition_schedule__["c" /* ENDED */ ];
                        schedule.timer.stop();
                        if (active) schedule.on.call("interrupt", node, node.__data__, schedule.index, schedule.group);
                        delete schedules[i];
                    }

                    if (empty) delete node.__transition;
                };


                /***/
            }),
            /* 43 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_color__ = __webpack_require__(4);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1_d3_interpolate__ = __webpack_require__(11);



                /* harmony default export */
                __webpack_exports__["a"] = function(a, b) {
                    var c;
                    return (typeof b === "number" ? __WEBPACK_IMPORTED_MODULE_1_d3_interpolate__["b" /* interpolateNumber */ ] :
                        b instanceof __WEBPACK_IMPORTED_MODULE_0_d3_color__["a" /* color */ ] ? __WEBPACK_IMPORTED_MODULE_1_d3_interpolate__["c" /* interpolateRgb */ ] :
                        (c = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["a" /* color */ ])(b)) ? (b = c, __WEBPACK_IMPORTED_MODULE_1_d3_interpolate__["c" /* interpolateRgb */ ]) :
                        __WEBPACK_IMPORTED_MODULE_1_d3_interpolate__["d" /* interpolateString */ ])(a, b);
                };


                /***/
            }),
            /* 44 */
            /***/
            (function(module, exports, __webpack_require__) {

                // https://d3js.org Version 4.5.0. Copyright 2017 Mike Bostock.
                (function(global, factory) {
                    true ? factory(exports) :
                        typeof define === 'function' && define.amd ? define(['exports'], factory) :
                        (factory((global.d3 = global.d3 || {})));
                }(this, (function(exports) {
                    'use strict';

                    var version = "4.5.0";

                    var ascending = function(a, b) {
                        return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
                    };

                    var bisector = function(compare) {
                        if (compare.length === 1) compare = ascendingComparator(compare);
                        return {
                            left: function(a, x, lo, hi) {
                                if (lo == null) lo = 0;
                                if (hi == null) hi = a.length;
                                while (lo < hi) {
                                    var mid = lo + hi >>> 1;
                                    if (compare(a[mid], x) < 0) lo = mid + 1;
                                    else hi = mid;
                                }
                                return lo;
                            },
                            right: function(a, x, lo, hi) {
                                if (lo == null) lo = 0;
                                if (hi == null) hi = a.length;
                                while (lo < hi) {
                                    var mid = lo + hi >>> 1;
                                    if (compare(a[mid], x) > 0) hi = mid;
                                    else lo = mid + 1;
                                }
                                return lo;
                            }
                        };
                    };

                    function ascendingComparator(f) {
                        return function(d, x) {
                            return ascending(f(d), x);
                        };
                    }

                    var ascendingBisect = bisector(ascending);
                    var bisectRight = ascendingBisect.right;
                    var bisectLeft = ascendingBisect.left;

                    var descending = function(a, b) {
                        return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
                    };

                    var number = function(x) {
                        return x === null ? NaN : +x;
                    };

                    var variance = function(array, f) {
                        var n = array.length,
                            m = 0,
                            a,
                            d,
                            s = 0,
                            i = -1,
                            j = 0;

                        if (f == null) {
                            while (++i < n) {
                                if (!isNaN(a = number(array[i]))) {
                                    d = a - m;
                                    m += d / ++j;
                                    s += d * (a - m);
                                }
                            }
                        } else {
                            while (++i < n) {
                                if (!isNaN(a = number(f(array[i], i, array)))) {
                                    d = a - m;
                                    m += d / ++j;
                                    s += d * (a - m);
                                }
                            }
                        }

                        if (j > 1) return s / (j - 1);
                    };

                    var deviation = function(array, f) {
                        var v = variance(array, f);
                        return v ? Math.sqrt(v) : v;
                    };

                    var extent = function(array, f) {
                        var i = -1,
                            n = array.length,
                            a,
                            b,
                            c;

                        if (f == null) {
                            while (++i < n)
                                if ((b = array[i]) != null && b >= b) { a = c = b; break; }
                            while (++i < n)
                                if ((b = array[i]) != null) {
                                    if (a > b) a = b;
                                    if (c < b) c = b;
                                }
                        } else {
                            while (++i < n)
                                if ((b = f(array[i], i, array)) != null && b >= b) { a = c = b; break; }
                            while (++i < n)
                                if ((b = f(array[i], i, array)) != null) {
                                    if (a > b) a = b;
                                    if (c < b) c = b;
                                }
                        }

                        return [a, c];
                    };

                    var array = Array.prototype;

                    var slice = array.slice;
                    var map = array.map;

                    var constant = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    var identity = function(x) {
                        return x;
                    };

                    var sequence = function(start, stop, step) {
                        start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;

                        var i = -1,
                            n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
                            range = new Array(n);

                        while (++i < n) {
                            range[i] = start + i * step;
                        }

                        return range;
                    };

                    var e10 = Math.sqrt(50);
                    var e5 = Math.sqrt(10);
                    var e2 = Math.sqrt(2);

                    var ticks = function(start, stop, count) {
                        var step = tickStep(start, stop, count);
                        return sequence(
                            Math.ceil(start / step) * step,
                            Math.floor(stop / step) * step + step / 2, // inclusive
                            step
                        );
                    };

                    function tickStep(start, stop, count) {
                        var step0 = Math.abs(stop - start) / Math.max(0, count),
                            step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
                            error = step0 / step1;
                        if (error >= e10) step1 *= 10;
                        else if (error >= e5) step1 *= 5;
                        else if (error >= e2) step1 *= 2;
                        return stop < start ? -step1 : step1;
                    }

                    var sturges = function(values) {
                        return Math.ceil(Math.log(values.length) / Math.LN2) + 1;
                    };

                    var histogram = function() {
                        var value = identity,
                            domain = extent,
                            threshold = sturges;

                        function histogram(data) {
                            var i,
                                n = data.length,
                                x,
                                values = new Array(n);

                            for (i = 0; i < n; ++i) {
                                values[i] = value(data[i], i, data);
                            }

                            var xz = domain(values),
                                x0 = xz[0],
                                x1 = xz[1],
                                tz = threshold(values, x0, x1);

                            // Convert number of thresholds into uniform thresholds.
                            if (!Array.isArray(tz)) tz = ticks(x0, x1, tz);

                            // Remove any thresholds outside the domain.
                            var m = tz.length;
                            while (tz[0] <= x0) tz.shift(), --m;
                            while (tz[m - 1] >= x1) tz.pop(), --m;

                            var bins = new Array(m + 1),
                                bin;

                            // Initialize bins.
                            for (i = 0; i <= m; ++i) {
                                bin = bins[i] = [];
                                bin.x0 = i > 0 ? tz[i - 1] : x0;
                                bin.x1 = i < m ? tz[i] : x1;
                            }

                            // Assign data to bins by value, ignoring any outside the domain.
                            for (i = 0; i < n; ++i) {
                                x = values[i];
                                if (x0 <= x && x <= x1) {
                                    bins[bisectRight(tz, x, 0, m)].push(data[i]);
                                }
                            }

                            return bins;
                        }

                        histogram.value = function(_) {
                            return arguments.length ? (value = typeof _ === "function" ? _ : constant(_), histogram) : value;
                        };

                        histogram.domain = function(_) {
                            return arguments.length ? (domain = typeof _ === "function" ? _ : constant([_[0], _[1]]), histogram) : domain;
                        };

                        histogram.thresholds = function(_) {
                            return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant(slice.call(_)) : constant(_), histogram) : threshold;
                        };

                        return histogram;
                    };

                    var threshold = function(array, p, f) {
                        if (f == null) f = number;
                        if (!(n = array.length)) return;
                        if ((p = +p) <= 0 || n < 2) return +f(array[0], 0, array);
                        if (p >= 1) return +f(array[n - 1], n - 1, array);
                        var n,
                            h = (n - 1) * p,
                            i = Math.floor(h),
                            a = +f(array[i], i, array),
                            b = +f(array[i + 1], i + 1, array);
                        return a + (b - a) * (h - i);
                    };

                    var freedmanDiaconis = function(values, min, max) {
                        values = map.call(values, number).sort(ascending);
                        return Math.ceil((max - min) / (2 * (threshold(values, 0.75) - threshold(values, 0.25)) * Math.pow(values.length, -1 / 3)));
                    };

                    var scott = function(values, min, max) {
                        return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(values.length, -1 / 3)));
                    };

                    var max = function(array, f) {
                        var i = -1,
                            n = array.length,
                            a,
                            b;

                        if (f == null) {
                            while (++i < n)
                                if ((b = array[i]) != null && b >= b) { a = b; break; }
                            while (++i < n)
                                if ((b = array[i]) != null && b > a) a = b;
                        } else {
                            while (++i < n)
                                if ((b = f(array[i], i, array)) != null && b >= b) { a = b; break; }
                            while (++i < n)
                                if ((b = f(array[i], i, array)) != null && b > a) a = b;
                        }

                        return a;
                    };

                    var mean = function(array, f) {
                        var s = 0,
                            n = array.length,
                            a,
                            i = -1,
                            j = n;

                        if (f == null) {
                            while (++i < n)
                                if (!isNaN(a = number(array[i]))) s += a;
                                else --j;
                        } else {
                            while (++i < n)
                                if (!isNaN(a = number(f(array[i], i, array)))) s += a;
                                else --j;
                        }

                        if (j) return s / j;
                    };

                    var median = function(array, f) {
                        var numbers = [],
                            n = array.length,
                            a,
                            i = -1;

                        if (f == null) {
                            while (++i < n)
                                if (!isNaN(a = number(array[i]))) numbers.push(a);
                        } else {
                            while (++i < n)
                                if (!isNaN(a = number(f(array[i], i, array)))) numbers.push(a);
                        }

                        return threshold(numbers.sort(ascending), 0.5);
                    };

                    var merge = function(arrays) {
                        var n = arrays.length,
                            m,
                            i = -1,
                            j = 0,
                            merged,
                            array;

                        while (++i < n) j += arrays[i].length;
                        merged = new Array(j);

                        while (--n >= 0) {
                            array = arrays[n];
                            m = array.length;
                            while (--m >= 0) {
                                merged[--j] = array[m];
                            }
                        }

                        return merged;
                    };

                    var min = function(array, f) {
                        var i = -1,
                            n = array.length,
                            a,
                            b;

                        if (f == null) {
                            while (++i < n)
                                if ((b = array[i]) != null && b >= b) { a = b; break; }
                            while (++i < n)
                                if ((b = array[i]) != null && a > b) a = b;
                        } else {
                            while (++i < n)
                                if ((b = f(array[i], i, array)) != null && b >= b) { a = b; break; }
                            while (++i < n)
                                if ((b = f(array[i], i, array)) != null && a > b) a = b;
                        }

                        return a;
                    };

                    var pairs = function(array) {
                        var i = 0,
                            n = array.length - 1,
                            p = array[0],
                            pairs = new Array(n < 0 ? 0 : n);
                        while (i < n) pairs[i] = [p, p = array[++i]];
                        return pairs;
                    };

                    var permute = function(array, indexes) {
                        var i = indexes.length,
                            permutes = new Array(i);
                        while (i--) permutes[i] = array[indexes[i]];
                        return permutes;
                    };

                    var scan = function(array, compare) {
                        if (!(n = array.length)) return;
                        var i = 0,
                            n,
                            j = 0,
                            xi,
                            xj = array[j];

                        if (!compare) compare = ascending;

                        while (++i < n)
                            if (compare(xi = array[i], xj) < 0 || compare(xj, xj) !== 0) xj = xi, j = i;

                        if (compare(xj, xj) === 0) return j;
                    };

                    var shuffle = function(array, i0, i1) {
                        var m = (i1 == null ? array.length : i1) - (i0 = i0 == null ? 0 : +i0),
                            t,
                            i;

                        while (m) {
                            i = Math.random() * m-- | 0;
                            t = array[m + i0];
                            array[m + i0] = array[i + i0];
                            array[i + i0] = t;
                        }

                        return array;
                    };

                    var sum = function(array, f) {
                        var s = 0,
                            n = array.length,
                            a,
                            i = -1;

                        if (f == null) {
                            while (++i < n)
                                if (a = +array[i]) s += a; // Note: zero and null are equivalent.
                        } else {
                            while (++i < n)
                                if (a = +f(array[i], i, array)) s += a;
                        }

                        return s;
                    };

                    var transpose = function(matrix) {
                        if (!(n = matrix.length)) return [];
                        for (var i = -1, m = min(matrix, length), transpose = new Array(m); ++i < m;) {
                            for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {
                                row[j] = matrix[j][i];
                            }
                        }
                        return transpose;
                    };

                    function length(d) {
                        return d.length;
                    }

                    var zip = function() {
                        return transpose(arguments);
                    };

                    var slice$1 = Array.prototype.slice;

                    var identity$1 = function(x) {
                        return x;
                    };

                    var top = 1;
                    var right = 2;
                    var bottom = 3;
                    var left = 4;
                    var epsilon = 1e-6;

                    function translateX(scale0, scale1, d) {
                        var x = scale0(d);
                        return "translate(" + (isFinite(x) ? x : scale1(d)) + ",0)";
                    }

                    function translateY(scale0, scale1, d) {
                        var y = scale0(d);
                        return "translate(0," + (isFinite(y) ? y : scale1(d)) + ")";
                    }

                    function center(scale) {
                        var offset = scale.bandwidth() / 2;
                        if (scale.round()) offset = Math.round(offset);
                        return function(d) {
                            return scale(d) + offset;
                        };
                    }

                    function entering() {
                        return !this.__axis;
                    }

                    function axis(orient, scale) {
                        var tickArguments = [],
                            tickValues = null,
                            tickFormat = null,
                            tickSizeInner = 6,
                            tickSizeOuter = 6,
                            tickPadding = 3;

                        function axis(context) {
                            var values = tickValues == null ? (scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain()) : tickValues,
                                format = tickFormat == null ? (scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity$1) : tickFormat,
                                spacing = Math.max(tickSizeInner, 0) + tickPadding,
                                transform = orient === top || orient === bottom ? translateX : translateY,
                                range = scale.range(),
                                range0 = range[0] + 0.5,
                                range1 = range[range.length - 1] + 0.5,
                                position = (scale.bandwidth ? center : identity$1)(scale.copy()),
                                selection = context.selection ? context.selection() : context,
                                path = selection.selectAll(".domain").data([null]),
                                tick = selection.selectAll(".tick").data(values, scale).order(),
                                tickExit = tick.exit(),
                                tickEnter = tick.enter().append("g").attr("class", "tick"),
                                line = tick.select("line"),
                                text = tick.select("text"),
                                k = orient === top || orient === left ? -1 : 1,
                                x, y = orient === left || orient === right ? (x = "x", "y") : (x = "y", "x");

                            path = path.merge(path.enter().insert("path", ".tick")
                                .attr("class", "domain")
                                .attr("stroke", "#000"));

                            tick = tick.merge(tickEnter);

                            line = line.merge(tickEnter.append("line")
                                .attr("stroke", "#000")
                                .attr(x + "2", k * tickSizeInner)
                                .attr(y + "1", 0.5)
                                .attr(y + "2", 0.5));

                            text = text.merge(tickEnter.append("text")
                                .attr("fill", "#000")
                                .attr(x, k * spacing)
                                .attr(y, 0.5)
                                .attr("dy", orient === top ? "0em" : orient === bottom ? "0.71em" : "0.32em"));

                            if (context !== selection) {
                                path = path.transition(context);
                                tick = tick.transition(context);
                                line = line.transition(context);
                                text = text.transition(context);

                                tickExit = tickExit.transition(context)
                                    .attr("opacity", epsilon)
                                    .attr("transform", function(d) { return transform(position, this.parentNode.__axis || position, d); });

                                tickEnter
                                    .attr("opacity", epsilon)
                                    .attr("transform", function(d) { return transform(this.parentNode.__axis || position, position, d); });
                            }

                            tickExit.remove();

                            path
                                .attr("d", orient === left || orient == right ?
                                    "M" + k * tickSizeOuter + "," + range0 + "H0.5V" + range1 + "H" + k * tickSizeOuter :
                                    "M" + range0 + "," + k * tickSizeOuter + "V0.5H" + range1 + "V" + k * tickSizeOuter);

                            tick
                                .attr("opacity", 1)
                                .attr("transform", function(d) { return transform(position, position, d); });

                            line
                                .attr(x + "2", k * tickSizeInner);

                            text
                                .attr(x, k * spacing)
                                .text(format);

                            selection.filter(entering)
                                .attr("fill", "none")
                                .attr("font-size", 10)
                                .attr("font-family", "sans-serif")
                                .attr("text-anchor", orient === right ? "start" : orient === left ? "end" : "middle");

                            selection
                                .each(function() { this.__axis = position; });
                        }

                        axis.scale = function(_) {
                            return arguments.length ? (scale = _, axis) : scale;
                        };

                        axis.ticks = function() {
                            return tickArguments = slice$1.call(arguments), axis;
                        };

                        axis.tickArguments = function(_) {
                            return arguments.length ? (tickArguments = _ == null ? [] : slice$1.call(_), axis) : tickArguments.slice();
                        };

                        axis.tickValues = function(_) {
                            return arguments.length ? (tickValues = _ == null ? null : slice$1.call(_), axis) : tickValues && tickValues.slice();
                        };

                        axis.tickFormat = function(_) {
                            return arguments.length ? (tickFormat = _, axis) : tickFormat;
                        };

                        axis.tickSize = function(_) {
                            return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner;
                        };

                        axis.tickSizeInner = function(_) {
                            return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner;
                        };

                        axis.tickSizeOuter = function(_) {
                            return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter;
                        };

                        axis.tickPadding = function(_) {
                            return arguments.length ? (tickPadding = +_, axis) : tickPadding;
                        };

                        return axis;
                    }

                    function axisTop(scale) {
                        return axis(top, scale);
                    }

                    function axisRight(scale) {
                        return axis(right, scale);
                    }

                    function axisBottom(scale) {
                        return axis(bottom, scale);
                    }

                    function axisLeft(scale) {
                        return axis(left, scale);
                    }

                    var noop = { value: function() {} };

                    function dispatch() {
                        for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
                            if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
                            _[t] = [];
                        }
                        return new Dispatch(_);
                    }

                    function Dispatch(_) {
                        this._ = _;
                    }

                    function parseTypenames(typenames, types) {
                        return typenames.trim().split(/^|\s+/).map(function(t) {
                            var name = "",
                                i = t.indexOf(".");
                            if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
                            if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
                            return { type: t, name: name };
                        });
                    }

                    Dispatch.prototype = dispatch.prototype = {
                        constructor: Dispatch,
                        on: function(typename, callback) {
                            var _ = this._,
                                T = parseTypenames(typename + "", _),
                                t,
                                i = -1,
                                n = T.length;

                            // If no callback was specified, return the callback of the given type and name.
                            if (arguments.length < 2) {
                                while (++i < n)
                                    if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
                                return;
                            }

                            // If a type was specified, set the callback for the given type and name.
                            // Otherwise, if a null callback was specified, remove callbacks of the given name.
                            if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
                            while (++i < n) {
                                if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);
                                else if (callback == null)
                                    for (t in _) _[t] = set(_[t], typename.name, null);
                            }

                            return this;
                        },
                        copy: function() {
                            var copy = {},
                                _ = this._;
                            for (var t in _) copy[t] = _[t].slice();
                            return new Dispatch(copy);
                        },
                        call: function(type, that) {
                            if ((n = arguments.length - 2) > 0)
                                for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
                            if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
                            for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
                        },
                        apply: function(type, that, args) {
                            if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
                            for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
                        }
                    };

                    function get(type, name) {
                        for (var i = 0, n = type.length, c; i < n; ++i) {
                            if ((c = type[i]).name === name) {
                                return c.value;
                            }
                        }
                    }

                    function set(type, name, callback) {
                        for (var i = 0, n = type.length; i < n; ++i) {
                            if (type[i].name === name) {
                                type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
                                break;
                            }
                        }
                        if (callback != null) type.push({ name: name, value: callback });
                        return type;
                    }

                    var xhtml = "http://www.w3.org/1999/xhtml";

                    var namespaces = {
                        svg: "http://www.w3.org/2000/svg",
                        xhtml: xhtml,
                        xlink: "http://www.w3.org/1999/xlink",
                        xml: "http://www.w3.org/XML/1998/namespace",
                        xmlns: "http://www.w3.org/2000/xmlns/"
                    };

                    var namespace = function(name) {
                        var prefix = name += "",
                            i = prefix.indexOf(":");
                        if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
                        return namespaces.hasOwnProperty(prefix) ? { space: namespaces[prefix], local: name } : name;
                    };

                    function creatorInherit(name) {
                        return function() {
                            var document = this.ownerDocument,
                                uri = this.namespaceURI;
                            return uri === xhtml && document.documentElement.namespaceURI === xhtml ?
                                document.createElement(name) :
                                document.createElementNS(uri, name);
                        };
                    }

                    function creatorFixed(fullname) {
                        return function() {
                            return this.ownerDocument.createElementNS(fullname.space, fullname.local);
                        };
                    }

                    var creator = function(name) {
                        var fullname = namespace(name);
                        return (fullname.local ?
                            creatorFixed :
                            creatorInherit)(fullname);
                    };

                    var nextId = 0;

                    function local$1() {
                        return new Local;
                    }

                    function Local() {
                        this._ = "@" + (++nextId).toString(36);
                    }

                    Local.prototype = local$1.prototype = {
                        constructor: Local,
                        get: function(node) {
                            var id = this._;
                            while (!(id in node))
                                if (!(node = node.parentNode)) return;
                            return node[id];
                        },
                        set: function(node, value) {
                            return node[this._] = value;
                        },
                        remove: function(node) {
                            return this._ in node && delete node[this._];
                        },
                        toString: function() {
                            return this._;
                        }
                    };

                    var matcher = function(selector) {
                        return function() {
                            return this.matches(selector);
                        };
                    };

                    if (typeof document !== "undefined") {
                        var element = document.documentElement;
                        if (!element.matches) {
                            var vendorMatches = element.webkitMatchesSelector ||
                                element.msMatchesSelector ||
                                element.mozMatchesSelector ||
                                element.oMatchesSelector;
                            matcher = function(selector) {
                                return function() {
                                    return vendorMatches.call(this, selector);
                                };
                            };
                        }
                    }

                    var matcher$1 = matcher;

                    var filterEvents = {};

                    exports.event = null;

                    if (typeof document !== "undefined") {
                        var element$1 = document.documentElement;
                        if (!("onmouseenter" in element$1)) {
                            filterEvents = { mouseenter: "mouseover", mouseleave: "mouseout" };
                        }
                    }

                    function filterContextListener(listener, index, group) {
                        listener = contextListener(listener, index, group);
                        return function(event) {
                            var related = event.relatedTarget;
                            if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
                                listener.call(this, event);
                            }
                        };
                    }

                    function contextListener(listener, index, group) {
                        return function(event1) {
                            var event0 = exports.event; // Events can be reentrant (e.g., focus).
                            exports.event = event1;
                            try {
                                listener.call(this, this.__data__, index, group);
                            } finally {
                                exports.event = event0;
                            }
                        };
                    }

                    function parseTypenames$1(typenames) {
                        return typenames.trim().split(/^|\s+/).map(function(t) {
                            var name = "",
                                i = t.indexOf(".");
                            if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
                            return { type: t, name: name };
                        });
                    }

                    function onRemove(typename) {
                        return function() {
                            var on = this.__on;
                            if (!on) return;
                            for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
                                if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
                                    this.removeEventListener(o.type, o.listener, o.capture);
                                } else {
                                    on[++i] = o;
                                }
                            }
                            if (++i) on.length = i;
                            else delete this.__on;
                        };
                    }

                    function onAdd(typename, value, capture) {
                        var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
                        return function(d, i, group) {
                            var on = this.__on,
                                o, listener = wrap(value, i, group);
                            if (on)
                                for (var j = 0, m = on.length; j < m; ++j) {
                                    if ((o = on[j]).type === typename.type && o.name === typename.name) {
                                        this.removeEventListener(o.type, o.listener, o.capture);
                                        this.addEventListener(o.type, o.listener = listener, o.capture = capture);
                                        o.value = value;
                                        return;
                                    }
                                }
                            this.addEventListener(typename.type, listener, capture);
                            o = { type: typename.type, name: typename.name, value: value, listener: listener, capture: capture };
                            if (!on) this.__on = [o];
                            else on.push(o);
                        };
                    }

                    var selection_on = function(typename, value, capture) {
                        var typenames = parseTypenames$1(typename + ""),
                            i, n = typenames.length,
                            t;

                        if (arguments.length < 2) {
                            var on = this.node().__on;
                            if (on)
                                for (var j = 0, m = on.length, o; j < m; ++j) {
                                    for (i = 0, o = on[j]; i < n; ++i) {
                                        if ((t = typenames[i]).type === o.type && t.name === o.name) {
                                            return o.value;
                                        }
                                    }
                                }
                            return;
                        }

                        on = value ? onAdd : onRemove;
                        if (capture == null) capture = false;
                        for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
                        return this;
                    };

                    function customEvent(event1, listener, that, args) {
                        var event0 = exports.event;
                        event1.sourceEvent = exports.event;
                        exports.event = event1;
                        try {
                            return listener.apply(that, args);
                        } finally {
                            exports.event = event0;
                        }
                    }

                    var sourceEvent = function() {
                        var current = exports.event,
                            source;
                        while (source = current.sourceEvent) current = source;
                        return current;
                    };

                    var point = function(node, event) {
                        var svg = node.ownerSVGElement || node;

                        if (svg.createSVGPoint) {
                            var point = svg.createSVGPoint();
                            point.x = event.clientX, point.y = event.clientY;
                            point = point.matrixTransform(node.getScreenCTM().inverse());
                            return [point.x, point.y];
                        }

                        var rect = node.getBoundingClientRect();
                        return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
                    };

                    var mouse = function(node) {
                        var event = sourceEvent();
                        if (event.changedTouches) event = event.changedTouches[0];
                        return point(node, event);
                    };

                    function none() {}

                    var selector = function(selector) {
                        return selector == null ? none : function() {
                            return this.querySelector(selector);
                        };
                    };

                    var selection_select = function(select) {
                        if (typeof select !== "function") select = selector(select);

                        for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
                            for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
                                if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
                                    if ("__data__" in node) subnode.__data__ = node.__data__;
                                    subgroup[i] = subnode;
                                }
                            }
                        }

                        return new Selection(subgroups, this._parents);
                    };

                    function empty$1() {
                        return [];
                    }

                    var selectorAll = function(selector) {
                        return selector == null ? empty$1 : function() {
                            return this.querySelectorAll(selector);
                        };
                    };

                    var selection_selectAll = function(select) {
                        if (typeof select !== "function") select = selectorAll(select);

                        for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
                            for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
                                if (node = group[i]) {
                                    subgroups.push(select.call(node, node.__data__, i, group));
                                    parents.push(node);
                                }
                            }
                        }

                        return new Selection(subgroups, parents);
                    };

                    var selection_filter = function(match) {
                        if (typeof match !== "function") match = matcher$1(match);

                        for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
                            for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
                                if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
                                    subgroup.push(node);
                                }
                            }
                        }

                        return new Selection(subgroups, this._parents);
                    };

                    var sparse = function(update) {
                        return new Array(update.length);
                    };

                    var selection_enter = function() {
                        return new Selection(this._enter || this._groups.map(sparse), this._parents);
                    };

                    function EnterNode(parent, datum) {
                        this.ownerDocument = parent.ownerDocument;
                        this.namespaceURI = parent.namespaceURI;
                        this._next = null;
                        this._parent = parent;
                        this.__data__ = datum;
                    }

                    EnterNode.prototype = {
                        constructor: EnterNode,
                        appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
                        insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
                        querySelector: function(selector) { return this._parent.querySelector(selector); },
                        querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
                    };

                    var constant$1 = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    var keyPrefix = "$"; // Protect against keys like “__proto__”.

                    function bindIndex(parent, group, enter, update, exit, data) {
                        var i = 0,
                            node,
                            groupLength = group.length,
                            dataLength = data.length;

                        // Put any non-null nodes that fit into update.
                        // Put any null nodes into enter.
                        // Put any remaining data into enter.
                        for (; i < dataLength; ++i) {
                            if (node = group[i]) {
                                node.__data__ = data[i];
                                update[i] = node;
                            } else {
                                enter[i] = new EnterNode(parent, data[i]);
                            }
                        }

                        // Put any non-null nodes that don’t fit into exit.
                        for (; i < groupLength; ++i) {
                            if (node = group[i]) {
                                exit[i] = node;
                            }
                        }
                    }

                    function bindKey(parent, group, enter, update, exit, data, key) {
                        var i,
                            node,
                            nodeByKeyValue = {},
                            groupLength = group.length,
                            dataLength = data.length,
                            keyValues = new Array(groupLength),
                            keyValue;

                        // Compute the key for each node.
                        // If multiple nodes have the same key, the duplicates are added to exit.
                        for (i = 0; i < groupLength; ++i) {
                            if (node = group[i]) {
                                keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
                                if (keyValue in nodeByKeyValue) {
                                    exit[i] = node;
                                } else {
                                    nodeByKeyValue[keyValue] = node;
                                }
                            }
                        }

                        // Compute the key for each datum.
                        // If there a node associated with this key, join and add it to update.
                        // If there is not (or the key is a duplicate), add it to enter.
                        for (i = 0; i < dataLength; ++i) {
                            keyValue = keyPrefix + key.call(parent, data[i], i, data);
                            if (node = nodeByKeyValue[keyValue]) {
                                update[i] = node;
                                node.__data__ = data[i];
                                nodeByKeyValue[keyValue] = null;
                            } else {
                                enter[i] = new EnterNode(parent, data[i]);
                            }
                        }

                        // Add any remaining nodes that were not bound to data to exit.
                        for (i = 0; i < groupLength; ++i) {
                            if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
                                exit[i] = node;
                            }
                        }
                    }

                    var selection_data = function(value, key) {
                        if (!value) {
                            data = new Array(this.size()), j = -1;
                            this.each(function(d) { data[++j] = d; });
                            return data;
                        }

                        var bind = key ? bindKey : bindIndex,
                            parents = this._parents,
                            groups = this._groups;

                        if (typeof value !== "function") value = constant$1(value);

                        for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
                            var parent = parents[j],
                                group = groups[j],
                                groupLength = group.length,
                                data = value.call(parent, parent && parent.__data__, j, parents),
                                dataLength = data.length,
                                enterGroup = enter[j] = new Array(dataLength),
                                updateGroup = update[j] = new Array(dataLength),
                                exitGroup = exit[j] = new Array(groupLength);

                            bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);

                            // Now connect the enter nodes to their following update node, such that
                            // appendChild can insert the materialized enter node before this node,
                            // rather than at the end of the parent node.
                            for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
                                if (previous = enterGroup[i0]) {
                                    if (i0 >= i1) i1 = i0 + 1;
                                    while (!(next = updateGroup[i1]) && ++i1 < dataLength);
                                    previous._next = next || null;
                                }
                            }
                        }

                        update = new Selection(update, parents);
                        update._enter = enter;
                        update._exit = exit;
                        return update;
                    };

                    var selection_exit = function() {
                        return new Selection(this._exit || this._groups.map(sparse), this._parents);
                    };

                    var selection_merge = function(selection) {

                        for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
                            for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
                                if (node = group0[i] || group1[i]) {
                                    merge[i] = node;
                                }
                            }
                        }

                        for (; j < m0; ++j) {
                            merges[j] = groups0[j];
                        }

                        return new Selection(merges, this._parents);
                    };

                    var selection_order = function() {

                        for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
                            for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
                                if (node = group[i]) {
                                    if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
                                    next = node;
                                }
                            }
                        }

                        return this;
                    };

                    var selection_sort = function(compare) {
                        if (!compare) compare = ascending$1;

                        function compareNode(a, b) {
                            return a && b ? compare(a.__data__, b.__data__) : !a - !b;
                        }

                        for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
                            for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
                                if (node = group[i]) {
                                    sortgroup[i] = node;
                                }
                            }
                            sortgroup.sort(compareNode);
                        }

                        return new Selection(sortgroups, this._parents).order();
                    };

                    function ascending$1(a, b) {
                        return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
                    }

                    var selection_call = function() {
                        var callback = arguments[0];
                        arguments[0] = this;
                        callback.apply(null, arguments);
                        return this;
                    };

                    var selection_nodes = function() {
                        var nodes = new Array(this.size()),
                            i = -1;
                        this.each(function() { nodes[++i] = this; });
                        return nodes;
                    };

                    var selection_node = function() {

                        for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
                            for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
                                var node = group[i];
                                if (node) return node;
                            }
                        }

                        return null;
                    };

                    var selection_size = function() {
                        var size = 0;
                        this.each(function() {++size; });
                        return size;
                    };

                    var selection_empty = function() {
                        return !this.node();
                    };

                    var selection_each = function(callback) {

                        for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
                            for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
                                if (node = group[i]) callback.call(node, node.__data__, i, group);
                            }
                        }

                        return this;
                    };

                    function attrRemove(name) {
                        return function() {
                            this.removeAttribute(name);
                        };
                    }

                    function attrRemoveNS(fullname) {
                        return function() {
                            this.removeAttributeNS(fullname.space, fullname.local);
                        };
                    }

                    function attrConstant(name, value) {
                        return function() {
                            this.setAttribute(name, value);
                        };
                    }

                    function attrConstantNS(fullname, value) {
                        return function() {
                            this.setAttributeNS(fullname.space, fullname.local, value);
                        };
                    }

                    function attrFunction(name, value) {
                        return function() {
                            var v = value.apply(this, arguments);
                            if (v == null) this.removeAttribute(name);
                            else this.setAttribute(name, v);
                        };
                    }

                    function attrFunctionNS(fullname, value) {
                        return function() {
                            var v = value.apply(this, arguments);
                            if (v == null) this.removeAttributeNS(fullname.space, fullname.local);
                            else this.setAttributeNS(fullname.space, fullname.local, v);
                        };
                    }

                    var selection_attr = function(name, value) {
                        var fullname = namespace(name);

                        if (arguments.length < 2) {
                            var node = this.node();
                            return fullname.local ?
                                node.getAttributeNS(fullname.space, fullname.local) :
                                node.getAttribute(fullname);
                        }

                        return this.each((value == null ?
                            (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function" ?
                                (fullname.local ? attrFunctionNS : attrFunction) :
                                (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
                    };

                    var window = function(node) {
                        return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
                            ||
                            (node.document && node) // node is a Window
                            ||
                            node.defaultView; // node is a Document
                    };

                    function styleRemove(name) {
                        return function() {
                            this.style.removeProperty(name);
                        };
                    }

                    function styleConstant(name, value, priority) {
                        return function() {
                            this.style.setProperty(name, value, priority);
                        };
                    }

                    function styleFunction(name, value, priority) {
                        return function() {
                            var v = value.apply(this, arguments);
                            if (v == null) this.style.removeProperty(name);
                            else this.style.setProperty(name, v, priority);
                        };
                    }

                    var selection_style = function(name, value, priority) {
                        var node;
                        return arguments.length > 1 ?
                            this.each((value == null ?
                                styleRemove : typeof value === "function" ?
                                styleFunction :
                                styleConstant)(name, value, priority == null ? "" : priority)) :
                            window(node = this.node())
                            .getComputedStyle(node, null)
                            .getPropertyValue(name);
                    };

                    function propertyRemove(name) {
                        return function() {
                            delete this[name];
                        };
                    }

                    function propertyConstant(name, value) {
                        return function() {
                            this[name] = value;
                        };
                    }

                    function propertyFunction(name, value) {
                        return function() {
                            var v = value.apply(this, arguments);
                            if (v == null) delete this[name];
                            else this[name] = v;
                        };
                    }

                    var selection_property = function(name, value) {
                        return arguments.length > 1 ?
                            this.each((value == null ?
                                propertyRemove : typeof value === "function" ?
                                propertyFunction :
                                propertyConstant)(name, value)) :
                            this.node()[name];
                    };

                    function classArray(string) {
                        return string.trim().split(/^|\s+/);
                    }

                    function classList(node) {
                        return node.classList || new ClassList(node);
                    }

                    function ClassList(node) {
                        this._node = node;
                        this._names = classArray(node.getAttribute("class") || "");
                    }

                    ClassList.prototype = {
                        add: function(name) {
                            var i = this._names.indexOf(name);
                            if (i < 0) {
                                this._names.push(name);
                                this._node.setAttribute("class", this._names.join(" "));
                            }
                        },
                        remove: function(name) {
                            var i = this._names.indexOf(name);
                            if (i >= 0) {
                                this._names.splice(i, 1);
                                this._node.setAttribute("class", this._names.join(" "));
                            }
                        },
                        contains: function(name) {
                            return this._names.indexOf(name) >= 0;
                        }
                    };

                    function classedAdd(node, names) {
                        var list = classList(node),
                            i = -1,
                            n = names.length;
                        while (++i < n) list.add(names[i]);
                    }

                    function classedRemove(node, names) {
                        var list = classList(node),
                            i = -1,
                            n = names.length;
                        while (++i < n) list.remove(names[i]);
                    }

                    function classedTrue(names) {
                        return function() {
                            classedAdd(this, names);
                        };
                    }

                    function classedFalse(names) {
                        return function() {
                            classedRemove(this, names);
                        };
                    }

                    function classedFunction(names, value) {
                        return function() {
                            (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
                        };
                    }

                    var selection_classed = function(name, value) {
                        var names = classArray(name + "");

                        if (arguments.length < 2) {
                            var list = classList(this.node()),
                                i = -1,
                                n = names.length;
                            while (++i < n)
                                if (!list.contains(names[i])) return false;
                            return true;
                        }

                        return this.each((typeof value === "function" ?
                            classedFunction : value ?
                            classedTrue :
                            classedFalse)(names, value));
                    };

                    function textRemove() {
                        this.textContent = "";
                    }

                    function textConstant(value) {
                        return function() {
                            this.textContent = value;
                        };
                    }

                    function textFunction(value) {
                        return function() {
                            var v = value.apply(this, arguments);
                            this.textContent = v == null ? "" : v;
                        };
                    }

                    var selection_text = function(value) {
                        return arguments.length ?
                            this.each(value == null ?
                                textRemove : (typeof value === "function" ?
                                    textFunction :
                                    textConstant)(value)) :
                            this.node().textContent;
                    };

                    function htmlRemove() {
                        this.innerHTML = "";
                    }

                    function htmlConstant(value) {
                        return function() {
                            this.innerHTML = value;
                        };
                    }

                    function htmlFunction(value) {
                        return function() {
                            var v = value.apply(this, arguments);
                            this.innerHTML = v == null ? "" : v;
                        };
                    }

                    var selection_html = function(value) {
                        return arguments.length ?
                            this.each(value == null ?
                                htmlRemove : (typeof value === "function" ?
                                    htmlFunction :
                                    htmlConstant)(value)) :
                            this.node().innerHTML;
                    };

                    function raise() {
                        if (this.nextSibling) this.parentNode.appendChild(this);
                    }

                    var selection_raise = function() {
                        return this.each(raise);
                    };

                    function lower() {
                        if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
                    }

                    var selection_lower = function() {
                        return this.each(lower);
                    };

                    var selection_append = function(name) {
                        var create = typeof name === "function" ? name : creator(name);
                        return this.select(function() {
                            return this.appendChild(create.apply(this, arguments));
                        });
                    };

                    function constantNull() {
                        return null;
                    }

                    var selection_insert = function(name, before) {
                        var create = typeof name === "function" ? name : creator(name),
                            select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
                        return this.select(function() {
                            return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
                        });
                    };

                    function remove() {
                        var parent = this.parentNode;
                        if (parent) parent.removeChild(this);
                    }

                    var selection_remove = function() {
                        return this.each(remove);
                    };

                    var selection_datum = function(value) {
                        return arguments.length ?
                            this.property("__data__", value) :
                            this.node().__data__;
                    };

                    function dispatchEvent(node, type, params) {
                        var window$$1 = window(node),
                            event = window$$1.CustomEvent;

                        if (event) {
                            event = new event(type, params);
                        } else {
                            event = window$$1.document.createEvent("Event");
                            if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;
                            else event.initEvent(type, false, false);
                        }

                        node.dispatchEvent(event);
                    }

                    function dispatchConstant(type, params) {
                        return function() {
                            return dispatchEvent(this, type, params);
                        };
                    }

                    function dispatchFunction(type, params) {
                        return function() {
                            return dispatchEvent(this, type, params.apply(this, arguments));
                        };
                    }

                    var selection_dispatch = function(type, params) {
                        return this.each((typeof params === "function" ?
                            dispatchFunction :
                            dispatchConstant)(type, params));
                    };

                    var root = [null];

                    function Selection(groups, parents) {
                        this._groups = groups;
                        this._parents = parents;
                    }

                    function selection() {
                        return new Selection([
                            [document.documentElement]
                        ], root);
                    }

                    Selection.prototype = selection.prototype = {
                        constructor: Selection,
                        select: selection_select,
                        selectAll: selection_selectAll,
                        filter: selection_filter,
                        data: selection_data,
                        enter: selection_enter,
                        exit: selection_exit,
                        merge: selection_merge,
                        order: selection_order,
                        sort: selection_sort,
                        call: selection_call,
                        nodes: selection_nodes,
                        node: selection_node,
                        size: selection_size,
                        empty: selection_empty,
                        each: selection_each,
                        attr: selection_attr,
                        style: selection_style,
                        property: selection_property,
                        classed: selection_classed,
                        text: selection_text,
                        html: selection_html,
                        raise: selection_raise,
                        lower: selection_lower,
                        append: selection_append,
                        insert: selection_insert,
                        remove: selection_remove,
                        datum: selection_datum,
                        on: selection_on,
                        dispatch: selection_dispatch
                    };

                    var select = function(selector) {
                        return typeof selector === "string" ?
                            new Selection([
                                [document.querySelector(selector)]
                            ], [document.documentElement]) :
                            new Selection([
                                [selector]
                            ], root);
                    };

                    var selectAll = function(selector) {
                        return typeof selector === "string" ?
                            new Selection([document.querySelectorAll(selector)], [document.documentElement]) :
                            new Selection([selector == null ? [] : selector], root);
                    };

                    var touch = function(node, touches, identifier) {
                        if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;

                        for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
                            if ((touch = touches[i]).identifier === identifier) {
                                return point(node, touch);
                            }
                        }

                        return null;
                    };

                    var touches = function(node, touches) {
                        if (touches == null) touches = sourceEvent().touches;

                        for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {
                            points[i] = point(node, touches[i]);
                        }

                        return points;
                    };

                    function nopropagation() {
                        exports.event.stopImmediatePropagation();
                    }

                    var noevent = function() {
                        exports.event.preventDefault();
                        exports.event.stopImmediatePropagation();
                    };

                    var dragDisable = function(view) {
                        var root = view.document.documentElement,
                            selection$$1 = select(view).on("dragstart.drag", noevent, true);
                        if ("onselectstart" in root) {
                            selection$$1.on("selectstart.drag", noevent, true);
                        } else {
                            root.__noselect = root.style.MozUserSelect;
                            root.style.MozUserSelect = "none";
                        }
                    };

                    function yesdrag(view, noclick) {
                        var root = view.document.documentElement,
                            selection$$1 = select(view).on("dragstart.drag", null);
                        if (noclick) {
                            selection$$1.on("click.drag", noevent, true);
                            setTimeout(function() { selection$$1.on("click.drag", null); }, 0);
                        }
                        if ("onselectstart" in root) {
                            selection$$1.on("selectstart.drag", null);
                        } else {
                            root.style.MozUserSelect = root.__noselect;
                            delete root.__noselect;
                        }
                    }

                    var constant$2 = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
                        this.target = target;
                        this.type = type;
                        this.subject = subject;
                        this.identifier = id;
                        this.active = active;
                        this.x = x;
                        this.y = y;
                        this.dx = dx;
                        this.dy = dy;
                        this._ = dispatch;
                    }

                    DragEvent.prototype.on = function() {
                        var value = this._.on.apply(this._, arguments);
                        return value === this._ ? this : value;
                    };

                    // Ignore right-click, since that should open the context menu.
                    function defaultFilter$1() {
                        return !exports.event.button;
                    }

                    function defaultContainer() {
                        return this.parentNode;
                    }

                    function defaultSubject(d) {
                        return d == null ? { x: exports.event.x, y: exports.event.y } : d;
                    }

                    var drag = function() {
                        var filter = defaultFilter$1,
                            container = defaultContainer,
                            subject = defaultSubject,
                            gestures = {},
                            listeners = dispatch("start", "drag", "end"),
                            active = 0,
                            mousemoving,
                            touchending;

                        function drag(selection$$1) {
                            selection$$1
                                .on("mousedown.drag", mousedowned)
                                .on("touchstart.drag", touchstarted)
                                .on("touchmove.drag", touchmoved)
                                .on("touchend.drag touchcancel.drag", touchended)
                                .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
                        }

                        function mousedowned() {
                            if (touchending || !filter.apply(this, arguments)) return;
                            var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments);
                            if (!gesture) return;
                            select(exports.event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
                            dragDisable(exports.event.view);
                            nopropagation();
                            mousemoving = false;
                            gesture("start");
                        }

                        function mousemoved() {
                            noevent();
                            mousemoving = true;
                            gestures.mouse("drag");
                        }

                        function mouseupped() {
                            select(exports.event.view).on("mousemove.drag mouseup.drag", null);
                            yesdrag(exports.event.view, mousemoving);
                            noevent();
                            gestures.mouse("end");
                        }

                        function touchstarted() {
                            if (!filter.apply(this, arguments)) return;
                            var touches$$1 = exports.event.changedTouches,
                                c = container.apply(this, arguments),
                                n = touches$$1.length,
                                i, gesture;

                            for (i = 0; i < n; ++i) {
                                if (gesture = beforestart(touches$$1[i].identifier, c, touch, this, arguments)) {
                                    nopropagation();
                                    gesture("start");
                                }
                            }
                        }

                        function touchmoved() {
                            var touches$$1 = exports.event.changedTouches,
                                n = touches$$1.length,
                                i, gesture;

                            for (i = 0; i < n; ++i) {
                                if (gesture = gestures[touches$$1[i].identifier]) {
                                    noevent();
                                    gesture("drag");
                                }
                            }
                        }

                        function touchended() {
                            var touches$$1 = exports.event.changedTouches,
                                n = touches$$1.length,
                                i, gesture;

                            if (touchending) clearTimeout(touchending);
                            touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
                            for (i = 0; i < n; ++i) {
                                if (gesture = gestures[touches$$1[i].identifier]) {
                                    nopropagation();
                                    gesture("end");
                                }
                            }
                        }

                        function beforestart(id, container, point, that, args) {
                            var p = point(container, id),
                                s, dx, dy,
                                sublisteners = listeners.copy();

                            if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
                                    if ((exports.event.subject = s = subject.apply(that, args)) == null) return false;
                                    dx = s.x - p[0] || 0;
                                    dy = s.y - p[1] || 0;
                                    return true;
                                })) return;

                            return function gesture(type) {
                                var p0 = p,
                                    n;
                                switch (type) {
                                    case "start":
                                        gestures[id] = gesture, n = active++;
                                        break;
                                    case "end":
                                        delete gestures[id], --active; // nobreak
                                    case "drag":
                                        p = point(container, id), n = active;
                                        break;
                                }
                                customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
                            };
                        }

                        drag.filter = function(_) {
                            return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter;
                        };

                        drag.container = function(_) {
                            return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container;
                        };

                        drag.subject = function(_) {
                            return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject;
                        };

                        drag.on = function() {
                            var value = listeners.on.apply(listeners, arguments);
                            return value === listeners ? drag : value;
                        };

                        return drag;
                    };

                    var define = function(constructor, factory, prototype) {
                        constructor.prototype = factory.prototype = prototype;
                        prototype.constructor = constructor;
                    };

                    function extend(parent, definition) {
                        var prototype = Object.create(parent.prototype);
                        for (var key in definition) prototype[key] = definition[key];
                        return prototype;
                    }

                    function Color() {}

                    var darker = 0.7;
                    var brighter = 1 / darker;

                    var reI = "\\s*([+-]?\\d+)\\s*";
                    var reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*";
                    var reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*";
                    var reHex3 = /^#([0-9a-f]{3})$/;
                    var reHex6 = /^#([0-9a-f]{6})$/;
                    var reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$");
                    var reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$");
                    var reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$");
                    var reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$");
                    var reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$");
                    var reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");

                    var named = {
                        aliceblue: 0xf0f8ff,
                        antiquewhite: 0xfaebd7,
                        aqua: 0x00ffff,
                        aquamarine: 0x7fffd4,
                        azure: 0xf0ffff,
                        beige: 0xf5f5dc,
                        bisque: 0xffe4c4,
                        black: 0x000000,
                        blanchedalmond: 0xffebcd,
                        blue: 0x0000ff,
                        blueviolet: 0x8a2be2,
                        brown: 0xa52a2a,
                        burlywood: 0xdeb887,
                        cadetblue: 0x5f9ea0,
                        chartreuse: 0x7fff00,
                        chocolate: 0xd2691e,
                        coral: 0xff7f50,
                        cornflowerblue: 0x6495ed,
                        cornsilk: 0xfff8dc,
                        crimson: 0xdc143c,
                        cyan: 0x00ffff,
                        darkblue: 0x00008b,
                        darkcyan: 0x008b8b,
                        darkgoldenrod: 0xb8860b,
                        darkgray: 0xa9a9a9,
                        darkgreen: 0x006400,
                        darkgrey: 0xa9a9a9,
                        darkkhaki: 0xbdb76b,
                        darkmagenta: 0x8b008b,
                        darkolivegreen: 0x556b2f,
                        darkorange: 0xff8c00,
                        darkorchid: 0x9932cc,
                        darkred: 0x8b0000,
                        darksalmon: 0xe9967a,
                        darkseagreen: 0x8fbc8f,
                        darkslateblue: 0x483d8b,
                        darkslategray: 0x2f4f4f,
                        darkslategrey: 0x2f4f4f,
                        darkturquoise: 0x00ced1,
                        darkviolet: 0x9400d3,
                        deeppink: 0xff1493,
                        deepskyblue: 0x00bfff,
                        dimgray: 0x696969,
                        dimgrey: 0x696969,
                        dodgerblue: 0x1e90ff,
                        firebrick: 0xb22222,
                        floralwhite: 0xfffaf0,
                        forestgreen: 0x228b22,
                        fuchsia: 0xff00ff,
                        gainsboro: 0xdcdcdc,
                        ghostwhite: 0xf8f8ff,
                        gold: 0xffd700,
                        goldenrod: 0xdaa520,
                        gray: 0x808080,
                        green: 0x008000,
                        greenyellow: 0xadff2f,
                        grey: 0x808080,
                        honeydew: 0xf0fff0,
                        hotpink: 0xff69b4,
                        indianred: 0xcd5c5c,
                        indigo: 0x4b0082,
                        ivory: 0xfffff0,
                        khaki: 0xf0e68c,
                        lavender: 0xe6e6fa,
                        lavenderblush: 0xfff0f5,
                        lawngreen: 0x7cfc00,
                        lemonchiffon: 0xfffacd,
                        lightblue: 0xadd8e6,
                        lightcoral: 0xf08080,
                        lightcyan: 0xe0ffff,
                        lightgoldenrodyellow: 0xfafad2,
                        lightgray: 0xd3d3d3,
                        lightgreen: 0x90ee90,
                        lightgrey: 0xd3d3d3,
                        lightpink: 0xffb6c1,
                        lightsalmon: 0xffa07a,
                        lightseagreen: 0x20b2aa,
                        lightskyblue: 0x87cefa,
                        lightslategray: 0x778899,
                        lightslategrey: 0x778899,
                        lightsteelblue: 0xb0c4de,
                        lightyellow: 0xffffe0,
                        lime: 0x00ff00,
                        limegreen: 0x32cd32,
                        linen: 0xfaf0e6,
                        magenta: 0xff00ff,
                        maroon: 0x800000,
                        mediumaquamarine: 0x66cdaa,
                        mediumblue: 0x0000cd,
                        mediumorchid: 0xba55d3,
                        mediumpurple: 0x9370db,
                        mediumseagreen: 0x3cb371,
                        mediumslateblue: 0x7b68ee,
                        mediumspringgreen: 0x00fa9a,
                        mediumturquoise: 0x48d1cc,
                        mediumvioletred: 0xc71585,
                        midnightblue: 0x191970,
                        mintcream: 0xf5fffa,
                        mistyrose: 0xffe4e1,
                        moccasin: 0xffe4b5,
                        navajowhite: 0xffdead,
                        navy: 0x000080,
                        oldlace: 0xfdf5e6,
                        olive: 0x808000,
                        olivedrab: 0x6b8e23,
                        orange: 0xffa500,
                        orangered: 0xff4500,
                        orchid: 0xda70d6,
                        palegoldenrod: 0xeee8aa,
                        palegreen: 0x98fb98,
                        paleturquoise: 0xafeeee,
                        palevioletred: 0xdb7093,
                        papayawhip: 0xffefd5,
                        peachpuff: 0xffdab9,
                        peru: 0xcd853f,
                        pink: 0xffc0cb,
                        plum: 0xdda0dd,
                        powderblue: 0xb0e0e6,
                        purple: 0x800080,
                        rebeccapurple: 0x663399,
                        red: 0xff0000,
                        rosybrown: 0xbc8f8f,
                        royalblue: 0x4169e1,
                        saddlebrown: 0x8b4513,
                        salmon: 0xfa8072,
                        sandybrown: 0xf4a460,
                        seagreen: 0x2e8b57,
                        seashell: 0xfff5ee,
                        sienna: 0xa0522d,
                        silver: 0xc0c0c0,
                        skyblue: 0x87ceeb,
                        slateblue: 0x6a5acd,
                        slategray: 0x708090,
                        slategrey: 0x708090,
                        snow: 0xfffafa,
                        springgreen: 0x00ff7f,
                        steelblue: 0x4682b4,
                        tan: 0xd2b48c,
                        teal: 0x008080,
                        thistle: 0xd8bfd8,
                        tomato: 0xff6347,
                        turquoise: 0x40e0d0,
                        violet: 0xee82ee,
                        wheat: 0xf5deb3,
                        white: 0xffffff,
                        whitesmoke: 0xf5f5f5,
                        yellow: 0xffff00,
                        yellowgreen: 0x9acd32
                    };

                    define(Color, color, {
                        displayable: function() {
                            return this.rgb().displayable();
                        },
                        toString: function() {
                            return this.rgb() + "";
                        }
                    });

                    function color(format) {
                        var m;
                        format = (format + "").trim().toLowerCase();
                        return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00
                            :
                            (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
                            :
                            (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
                            :
                            (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
                            :
                            (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
                            :
                            (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
                            :
                            (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
                            :
                            (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
                            :
                            named.hasOwnProperty(format) ? rgbn(named[format]) :
                            format === "transparent" ? new Rgb(NaN, NaN, NaN, 0) :
                            null;
                    }

                    function rgbn(n) {
                        return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
                    }

                    function rgba(r, g, b, a) {
                        if (a <= 0) r = g = b = NaN;
                        return new Rgb(r, g, b, a);
                    }

                    function rgbConvert(o) {
                        if (!(o instanceof Color)) o = color(o);
                        if (!o) return new Rgb;
                        o = o.rgb();
                        return new Rgb(o.r, o.g, o.b, o.opacity);
                    }

                    function rgb(r, g, b, opacity) {
                        return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
                    }

                    function Rgb(r, g, b, opacity) {
                        this.r = +r;
                        this.g = +g;
                        this.b = +b;
                        this.opacity = +opacity;
                    }

                    define(Rgb, rgb, extend(Color, {
                        brighter: function(k) {
                            k = k == null ? brighter : Math.pow(brighter, k);
                            return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
                        },
                        darker: function(k) {
                            k = k == null ? darker : Math.pow(darker, k);
                            return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
                        },
                        rgb: function() {
                            return this;
                        },
                        displayable: function() {
                            return (0 <= this.r && this.r <= 255) &&
                                (0 <= this.g && this.g <= 255) &&
                                (0 <= this.b && this.b <= 255) &&
                                (0 <= this.opacity && this.opacity <= 1);
                        },
                        toString: function() {
                            var a = this.opacity;
                            a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
                            return (a === 1 ? "rgb(" : "rgba(") +
                                Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", " +
                                Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", " +
                                Math.max(0, Math.min(255, Math.round(this.b) || 0)) +
                                (a === 1 ? ")" : ", " + a + ")");
                        }
                    }));

                    function hsla(h, s, l, a) {
                        if (a <= 0) h = s = l = NaN;
                        else if (l <= 0 || l >= 1) h = s = NaN;
                        else if (s <= 0) h = NaN;
                        return new Hsl(h, s, l, a);
                    }

                    function hslConvert(o) {
                        if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
                        if (!(o instanceof Color)) o = color(o);
                        if (!o) return new Hsl;
                        if (o instanceof Hsl) return o;
                        o = o.rgb();
                        var r = o.r / 255,
                            g = o.g / 255,
                            b = o.b / 255,
                            min = Math.min(r, g, b),
                            max = Math.max(r, g, b),
                            h = NaN,
                            s = max - min,
                            l = (max + min) / 2;
                        if (s) {
                            if (r === max) h = (g - b) / s + (g < b) * 6;
                            else if (g === max) h = (b - r) / s + 2;
                            else h = (r - g) / s + 4;
                            s /= l < 0.5 ? max + min : 2 - max - min;
                            h *= 60;
                        } else {
                            s = l > 0 && l < 1 ? 0 : h;
                        }
                        return new Hsl(h, s, l, o.opacity);
                    }

                    function hsl(h, s, l, opacity) {
                        return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
                    }

                    function Hsl(h, s, l, opacity) {
                        this.h = +h;
                        this.s = +s;
                        this.l = +l;
                        this.opacity = +opacity;
                    }

                    define(Hsl, hsl, extend(Color, {
                        brighter: function(k) {
                            k = k == null ? brighter : Math.pow(brighter, k);
                            return new Hsl(this.h, this.s, this.l * k, this.opacity);
                        },
                        darker: function(k) {
                            k = k == null ? darker : Math.pow(darker, k);
                            return new Hsl(this.h, this.s, this.l * k, this.opacity);
                        },
                        rgb: function() {
                            var h = this.h % 360 + (this.h < 0) * 360,
                                s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
                                l = this.l,
                                m2 = l + (l < 0.5 ? l : 1 - l) * s,
                                m1 = 2 * l - m2;
                            return new Rgb(
                                hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
                                hsl2rgb(h, m1, m2),
                                hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
                                this.opacity
                            );
                        },
                        displayable: function() {
                            return (0 <= this.s && this.s <= 1 || isNaN(this.s)) &&
                                (0 <= this.l && this.l <= 1) &&
                                (0 <= this.opacity && this.opacity <= 1);
                        }
                    }));

                    /* From FvD 13.37, CSS Color Module Level 3 */
                    function hsl2rgb(h, m1, m2) {
                        return (h < 60 ? m1 + (m2 - m1) * h / 60 :
                            h < 180 ? m2 :
                            h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 :
                            m1) * 255;
                    }

                    var deg2rad = Math.PI / 180;
                    var rad2deg = 180 / Math.PI;

                    var Kn = 18;
                    var Xn = 0.950470;
                    var Yn = 1;
                    var Zn = 1.088830;
                    var t0 = 4 / 29;
                    var t1 = 6 / 29;
                    var t2 = 3 * t1 * t1;
                    var t3 = t1 * t1 * t1;

                    function labConvert(o) {
                        if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
                        if (o instanceof Hcl) {
                            var h = o.h * deg2rad;
                            return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
                        }
                        if (!(o instanceof Rgb)) o = rgbConvert(o);
                        var b = rgb2xyz(o.r),
                            a = rgb2xyz(o.g),
                            l = rgb2xyz(o.b),
                            x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn),
                            y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn),
                            z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn);
                        return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
                    }

                    function lab(l, a, b, opacity) {
                        return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);
                    }

                    function Lab(l, a, b, opacity) {
                        this.l = +l;
                        this.a = +a;
                        this.b = +b;
                        this.opacity = +opacity;
                    }

                    define(Lab, lab, extend(Color, {
                        brighter: function(k) {
                            return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
                        },
                        darker: function(k) {
                            return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
                        },
                        rgb: function() {
                            var y = (this.l + 16) / 116,
                                x = isNaN(this.a) ? y : y + this.a / 500,
                                z = isNaN(this.b) ? y : y - this.b / 200;
                            y = Yn * lab2xyz(y);
                            x = Xn * lab2xyz(x);
                            z = Zn * lab2xyz(z);
                            return new Rgb(
                                xyz2rgb(3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB
                                xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z),
                                xyz2rgb(0.0556434 * x - 0.2040259 * y + 1.0572252 * z),
                                this.opacity
                            );
                        }
                    }));

                    function xyz2lab(t) {
                        return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;
                    }

                    function lab2xyz(t) {
                        return t > t1 ? t * t * t : t2 * (t - t0);
                    }

                    function xyz2rgb(x) {
                        return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
                    }

                    function rgb2xyz(x) {
                        return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
                    }

                    function hclConvert(o) {
                        if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
                        if (!(o instanceof Lab)) o = labConvert(o);
                        var h = Math.atan2(o.b, o.a) * rad2deg;
                        return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
                    }

                    function hcl(h, c, l, opacity) {
                        return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
                    }

                    function Hcl(h, c, l, opacity) {
                        this.h = +h;
                        this.c = +c;
                        this.l = +l;
                        this.opacity = +opacity;
                    }

                    define(Hcl, hcl, extend(Color, {
                        brighter: function(k) {
                            return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity);
                        },
                        darker: function(k) {
                            return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity);
                        },
                        rgb: function() {
                            return labConvert(this).rgb();
                        }
                    }));

                    var A = -0.14861;
                    var B = +1.78277;
                    var C = -0.29227;
                    var D = -0.90649;
                    var E = +1.97294;
                    var ED = E * D;
                    var EB = E * B;
                    var BC_DA = B * C - D * A;

                    function cubehelixConvert(o) {
                        if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
                        if (!(o instanceof Rgb)) o = rgbConvert(o);
                        var r = o.r / 255,
                            g = o.g / 255,
                            b = o.b / 255,
                            l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),
                            bl = b - l,
                            k = (E * (g - l) - C * bl) / D,
                            s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1
                            h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;
                        return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);
                    }

                    function cubehelix(h, s, l, opacity) {
                        return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);
                    }

                    function Cubehelix(h, s, l, opacity) {
                        this.h = +h;
                        this.s = +s;
                        this.l = +l;
                        this.opacity = +opacity;
                    }

                    define(Cubehelix, cubehelix, extend(Color, {
                        brighter: function(k) {
                            k = k == null ? brighter : Math.pow(brighter, k);
                            return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
                        },
                        darker: function(k) {
                            k = k == null ? darker : Math.pow(darker, k);
                            return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
                        },
                        rgb: function() {
                            var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,
                                l = +this.l,
                                a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
                                cosh = Math.cos(h),
                                sinh = Math.sin(h);
                            return new Rgb(
                                255 * (l + a * (A * cosh + B * sinh)),
                                255 * (l + a * (C * cosh + D * sinh)),
                                255 * (l + a * (E * cosh)),
                                this.opacity
                            );
                        }
                    }));

                    function basis(t1, v0, v1, v2, v3) {
                        var t2 = t1 * t1,
                            t3 = t2 * t1;
                        return ((1 - 3 * t1 + 3 * t2 - t3) * v0 +
                            (4 - 6 * t2 + 3 * t3) * v1 +
                            (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2 +
                            t3 * v3) / 6;
                    }

                    var basis$1 = function(values) {
                        var n = values.length - 1;
                        return function(t) {
                            var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
                                v1 = values[i],
                                v2 = values[i + 1],
                                v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
                                v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
                            return basis((t - i / n) * n, v0, v1, v2, v3);
                        };
                    };

                    var basisClosed = function(values) {
                        var n = values.length;
                        return function(t) {
                            var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
                                v0 = values[(i + n - 1) % n],
                                v1 = values[i % n],
                                v2 = values[(i + 1) % n],
                                v3 = values[(i + 2) % n];
                            return basis((t - i / n) * n, v0, v1, v2, v3);
                        };
                    };

                    var constant$3 = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    function linear(a, d) {
                        return function(t) {
                            return a + t * d;
                        };
                    }

                    function exponential(a, b, y) {
                        return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y,
                            function(t) {
                                return Math.pow(a + t * b, y);
                            };
                    }

                    function hue(a, b) {
                        var d = b - a;
                        return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$3(isNaN(a) ? b : a);
                    }

                    function gamma(y) {
                        return (y = +y) === 1 ? nogamma : function(a, b) {
                            return b - a ? exponential(a, b, y) : constant$3(isNaN(a) ? b : a);
                        };
                    }

                    function nogamma(a, b) {
                        var d = b - a;
                        return d ? linear(a, d) : constant$3(isNaN(a) ? b : a);
                    }

                    var interpolateRgb = ((function rgbGamma(y) {
                        var color$$1 = gamma(y);

                        function rgb$$1(start, end) {
                            var r = color$$1((start = rgb(start)).r, (end = rgb(end)).r),
                                g = color$$1(start.g, end.g),
                                b = color$$1(start.b, end.b),
                                opacity = nogamma(start.opacity, end.opacity);
                            return function(t) {
                                start.r = r(t);
                                start.g = g(t);
                                start.b = b(t);
                                start.opacity = opacity(t);
                                return start + "";
                            };
                        }

                        rgb$$1.gamma = rgbGamma;

                        return rgb$$1;
                    }))(1);

                    function rgbSpline(spline) {
                        return function(colors) {
                            var n = colors.length,
                                r = new Array(n),
                                g = new Array(n),
                                b = new Array(n),
                                i, color$$1;
                            for (i = 0; i < n; ++i) {
                                color$$1 = rgb(colors[i]);
                                r[i] = color$$1.r || 0;
                                g[i] = color$$1.g || 0;
                                b[i] = color$$1.b || 0;
                            }
                            r = spline(r);
                            g = spline(g);
                            b = spline(b);
                            color$$1.opacity = 1;
                            return function(t) {
                                color$$1.r = r(t);
                                color$$1.g = g(t);
                                color$$1.b = b(t);
                                return color$$1 + "";
                            };
                        };
                    }

                    var rgbBasis = rgbSpline(basis$1);
                    var rgbBasisClosed = rgbSpline(basisClosed);

                    var array$1 = function(a, b) {
                        var nb = b ? b.length : 0,
                            na = a ? Math.min(nb, a.length) : 0,
                            x = new Array(nb),
                            c = new Array(nb),
                            i;

                        for (i = 0; i < na; ++i) x[i] = interpolateValue(a[i], b[i]);
                        for (; i < nb; ++i) c[i] = b[i];

                        return function(t) {
                            for (i = 0; i < na; ++i) c[i] = x[i](t);
                            return c;
                        };
                    };

                    var date = function(a, b) {
                        var d = new Date;
                        return a = +a, b -= a,
                            function(t) {
                                return d.setTime(a + b * t), d;
                            };
                    };

                    var reinterpolate = function(a, b) {
                        return a = +a, b -= a,
                            function(t) {
                                return a + b * t;
                            };
                    };

                    var object = function(a, b) {
                        var i = {},
                            c = {},
                            k;

                        if (a === null || typeof a !== "object") a = {};
                        if (b === null || typeof b !== "object") b = {};

                        for (k in b) {
                            if (k in a) {
                                i[k] = interpolateValue(a[k], b[k]);
                            } else {
                                c[k] = b[k];
                            }
                        }

                        return function(t) {
                            for (k in i) c[k] = i[k](t);
                            return c;
                        };
                    };

                    var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g;
                    var reB = new RegExp(reA.source, "g");

                    function zero(b) {
                        return function() {
                            return b;
                        };
                    }

                    function one(b) {
                        return function(t) {
                            return b(t) + "";
                        };
                    }

                    var interpolateString = function(a, b) {
                        var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
                            am, // current match in a
                            bm, // current match in b
                            bs, // string preceding current number in b, if any
                            i = -1, // index in s
                            s = [], // string constants and placeholders
                            q = []; // number interpolators

                        // Coerce inputs to strings.
                        a = a + "", b = b + "";

                        // Interpolate pairs of numbers in a & b.
                        while ((am = reA.exec(a)) &&
                            (bm = reB.exec(b))) {
                            if ((bs = bm.index) > bi) { // a string precedes the next number in b
                                bs = b.slice(bi, bs);
                                if (s[i]) s[i] += bs; // coalesce with previous string
                                else s[++i] = bs;
                            }
                            if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
                                if (s[i]) s[i] += bm; // coalesce with previous string
                                else s[++i] = bm;
                            } else { // interpolate non-matching numbers
                                s[++i] = null;
                                q.push({ i: i, x: reinterpolate(am, bm) });
                            }
                            bi = reB.lastIndex;
                        }

                        // Add remains of b.
                        if (bi < b.length) {
                            bs = b.slice(bi);
                            if (s[i]) s[i] += bs; // coalesce with previous string
                            else s[++i] = bs;
                        }

                        // Special optimization for only a single match.
                        // Otherwise, interpolate each of the numbers and rejoin the string.
                        return s.length < 2 ? (q[0] ?
                                one(q[0].x) :
                                zero(b)) :
                            (b = q.length, function(t) {
                                for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
                                return s.join("");
                            });
                    };

                    var interpolateValue = function(a, b) {
                        var t = typeof b,
                            c;
                        return b == null || t === "boolean" ? constant$3(b) :
                            (t === "number" ? reinterpolate :
                                t === "string" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString) :
                                b instanceof color ? interpolateRgb :
                                b instanceof Date ? date :
                                Array.isArray(b) ? array$1 :
                                isNaN(b) ? object :
                                reinterpolate)(a, b);
                    };

                    var interpolateRound = function(a, b) {
                        return a = +a, b -= a,
                            function(t) {
                                return Math.round(a + b * t);
                            };
                    };

                    var degrees = 180 / Math.PI;

                    var identity$2 = {
                        translateX: 0,
                        translateY: 0,
                        rotate: 0,
                        skewX: 0,
                        scaleX: 1,
                        scaleY: 1
                    };

                    var decompose = function(a, b, c, d, e, f) {
                        var scaleX, scaleY, skewX;
                        if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
                        if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
                        if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
                        if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
                        return {
                            translateX: e,
                            translateY: f,
                            rotate: Math.atan2(b, a) * degrees,
                            skewX: Math.atan(skewX) * degrees,
                            scaleX: scaleX,
                            scaleY: scaleY
                        };
                    };

                    var cssNode;
                    var cssRoot;
                    var cssView;
                    var svgNode;

                    function parseCss(value) {
                        if (value === "none") return identity$2;
                        if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView;
                        cssNode.style.transform = value;
                        value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
                        cssRoot.removeChild(cssNode);
                        value = value.slice(7, -1).split(",");
                        return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
                    }

                    function parseSvg(value) {
                        if (value == null) return identity$2;
                        if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
                        svgNode.setAttribute("transform", value);
                        if (!(value = svgNode.transform.baseVal.consolidate())) return identity$2;
                        value = value.matrix;
                        return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
                    }

                    function interpolateTransform(parse, pxComma, pxParen, degParen) {

                        function pop(s) {
                            return s.length ? s.pop() + " " : "";
                        }

                        function translate(xa, ya, xb, yb, s, q) {
                            if (xa !== xb || ya !== yb) {
                                var i = s.push("translate(", null, pxComma, null, pxParen);
                                q.push({ i: i - 4, x: reinterpolate(xa, xb) }, { i: i - 2, x: reinterpolate(ya, yb) });
                            } else if (xb || yb) {
                                s.push("translate(" + xb + pxComma + yb + pxParen);
                            }
                        }

                        function rotate(a, b, s, q) {
                            if (a !== b) {
                                if (a - b > 180) b += 360;
                                else if (b - a > 180) a += 360; // shortest path
                                q.push({ i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: reinterpolate(a, b) });
                            } else if (b) {
                                s.push(pop(s) + "rotate(" + b + degParen);
                            }
                        }

                        function skewX(a, b, s, q) {
                            if (a !== b) {
                                q.push({ i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: reinterpolate(a, b) });
                            } else if (b) {
                                s.push(pop(s) + "skewX(" + b + degParen);
                            }
                        }

                        function scale(xa, ya, xb, yb, s, q) {
                            if (xa !== xb || ya !== yb) {
                                var i = s.push(pop(s) + "scale(", null, ",", null, ")");
                                q.push({ i: i - 4, x: reinterpolate(xa, xb) }, { i: i - 2, x: reinterpolate(ya, yb) });
                            } else if (xb !== 1 || yb !== 1) {
                                s.push(pop(s) + "scale(" + xb + "," + yb + ")");
                            }
                        }

                        return function(a, b) {
                            var s = [], // string constants and placeholders
                                q = []; // number interpolators
                            a = parse(a), b = parse(b);
                            translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
                            rotate(a.rotate, b.rotate, s, q);
                            skewX(a.skewX, b.skewX, s, q);
                            scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
                            a = b = null; // gc
                            return function(t) {
                                var i = -1,
                                    n = q.length,
                                    o;
                                while (++i < n) s[(o = q[i]).i] = o.x(t);
                                return s.join("");
                            };
                        };
                    }

                    var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
                    var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");

                    var rho = Math.SQRT2;
                    var rho2 = 2;
                    var rho4 = 4;
                    var epsilon2 = 1e-12;

                    function cosh(x) {
                        return ((x = Math.exp(x)) + 1 / x) / 2;
                    }

                    function sinh(x) {
                        return ((x = Math.exp(x)) - 1 / x) / 2;
                    }

                    function tanh(x) {
                        return ((x = Math.exp(2 * x)) - 1) / (x + 1);
                    }

                    // p0 = [ux0, uy0, w0]
                    // p1 = [ux1, uy1, w1]
                    var interpolateZoom = function(p0, p1) {
                        var ux0 = p0[0],
                            uy0 = p0[1],
                            w0 = p0[2],
                            ux1 = p1[0],
                            uy1 = p1[1],
                            w1 = p1[2],
                            dx = ux1 - ux0,
                            dy = uy1 - uy0,
                            d2 = dx * dx + dy * dy,
                            i,
                            S;

                        // Special case for u0 ≅ u1.
                        if (d2 < epsilon2) {
                            S = Math.log(w1 / w0) / rho;
                            i = function(t) {
                                return [
                                    ux0 + t * dx,
                                    uy0 + t * dy,
                                    w0 * Math.exp(rho * t * S)
                                ];
                            };
                        }

                        // General case.
                        else {
                            var d1 = Math.sqrt(d2),
                                b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
                                b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
                                r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
                                r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
                            S = (r1 - r0) / rho;
                            i = function(t) {
                                var s = t * S,
                                    coshr0 = cosh(r0),
                                    u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
                                return [
                                    ux0 + u * dx,
                                    uy0 + u * dy,
                                    w0 * coshr0 / cosh(rho * s + r0)
                                ];
                            };
                        }

                        i.duration = S * 1000;

                        return i;
                    };

                    function hsl$1(hue$$1) {
                        return function(start, end) {
                            var h = hue$$1((start = hsl(start)).h, (end = hsl(end)).h),
                                s = nogamma(start.s, end.s),
                                l = nogamma(start.l, end.l),
                                opacity = nogamma(start.opacity, end.opacity);
                            return function(t) {
                                start.h = h(t);
                                start.s = s(t);
                                start.l = l(t);
                                start.opacity = opacity(t);
                                return start + "";
                            };
                        }
                    }

                    var hsl$2 = hsl$1(hue);
                    var hslLong = hsl$1(nogamma);

                    function lab$1(start, end) {
                        var l = nogamma((start = lab(start)).l, (end = lab(end)).l),
                            a = nogamma(start.a, end.a),
                            b = nogamma(start.b, end.b),
                            opacity = nogamma(start.opacity, end.opacity);
                        return function(t) {
                            start.l = l(t);
                            start.a = a(t);
                            start.b = b(t);
                            start.opacity = opacity(t);
                            return start + "";
                        };
                    }

                    function hcl$1(hue$$1) {
                        return function(start, end) {
                            var h = hue$$1((start = hcl(start)).h, (end = hcl(end)).h),
                                c = nogamma(start.c, end.c),
                                l = nogamma(start.l, end.l),
                                opacity = nogamma(start.opacity, end.opacity);
                            return function(t) {
                                start.h = h(t);
                                start.c = c(t);
                                start.l = l(t);
                                start.opacity = opacity(t);
                                return start + "";
                            };
                        }
                    }

                    var hcl$2 = hcl$1(hue);
                    var hclLong = hcl$1(nogamma);

                    function cubehelix$1(hue$$1) {
                        return (function cubehelixGamma(y) {
                            y = +y;

                            function cubehelix$$1(start, end) {
                                var h = hue$$1((start = cubehelix(start)).h, (end = cubehelix(end)).h),
                                    s = nogamma(start.s, end.s),
                                    l = nogamma(start.l, end.l),
                                    opacity = nogamma(start.opacity, end.opacity);
                                return function(t) {
                                    start.h = h(t);
                                    start.s = s(t);
                                    start.l = l(Math.pow(t, y));
                                    start.opacity = opacity(t);
                                    return start + "";
                                };
                            }

                            cubehelix$$1.gamma = cubehelixGamma;

                            return cubehelix$$1;
                        })(1);
                    }

                    var cubehelix$2 = cubehelix$1(hue);
                    var cubehelixLong = cubehelix$1(nogamma);

                    var quantize = function(interpolator, n) {
                        var samples = new Array(n);
                        for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
                        return samples;
                    };

                    var frame = 0;
                    var timeout = 0;
                    var interval = 0;
                    var pokeDelay = 1000;
                    var taskHead;
                    var taskTail;
                    var clockLast = 0;
                    var clockNow = 0;
                    var clockSkew = 0;
                    var clock = typeof performance === "object" && performance.now ? performance : Date;
                    var setFrame = typeof requestAnimationFrame === "function" ? requestAnimationFrame : function(f) { setTimeout(f, 17); };

                    function now() {
                        return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
                    }

                    function clearNow() {
                        clockNow = 0;
                    }

                    function Timer() {
                        this._call =
                            this._time =
                            this._next = null;
                    }

                    Timer.prototype = timer.prototype = {
                        constructor: Timer,
                        restart: function(callback, delay, time) {
                            if (typeof callback !== "function") throw new TypeError("callback is not a function");
                            time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
                            if (!this._next && taskTail !== this) {
                                if (taskTail) taskTail._next = this;
                                else taskHead = this;
                                taskTail = this;
                            }
                            this._call = callback;
                            this._time = time;
                            sleep();
                        },
                        stop: function() {
                            if (this._call) {
                                this._call = null;
                                this._time = Infinity;
                                sleep();
                            }
                        }
                    };

                    function timer(callback, delay, time) {
                        var t = new Timer;
                        t.restart(callback, delay, time);
                        return t;
                    }

                    function timerFlush() {
                        now(); // Get the current time, if not already set.
                        ++frame; // Pretend we’ve set an alarm, if we haven’t already.
                        var t = taskHead,
                            e;
                        while (t) {
                            if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
                            t = t._next;
                        }
                        --frame;
                    }

                    function wake() {
                        clockNow = (clockLast = clock.now()) + clockSkew;
                        frame = timeout = 0;
                        try {
                            timerFlush();
                        } finally {
                            frame = 0;
                            nap();
                            clockNow = 0;
                        }
                    }

                    function poke() {
                        var now = clock.now(),
                            delay = now - clockLast;
                        if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
                    }

                    function nap() {
                        var t0, t1 = taskHead,
                            t2, time = Infinity;
                        while (t1) {
                            if (t1._call) {
                                if (time > t1._time) time = t1._time;
                                t0 = t1, t1 = t1._next;
                            } else {
                                t2 = t1._next, t1._next = null;
                                t1 = t0 ? t0._next = t2 : taskHead = t2;
                            }
                        }
                        taskTail = t0;
                        sleep(time);
                    }

                    function sleep(time) {
                        if (frame) return; // Soonest alarm already set, or will be.
                        if (timeout) timeout = clearTimeout(timeout);
                        var delay = time - clockNow;
                        if (delay > 24) {
                            if (time < Infinity) timeout = setTimeout(wake, delay);
                            if (interval) interval = clearInterval(interval);
                        } else {
                            if (!interval) clockLast = clockNow, interval = setInterval(poke, pokeDelay);
                            frame = 1, setFrame(wake);
                        }
                    }

                    var timeout$1 = function(callback, delay, time) {
                        var t = new Timer;
                        delay = delay == null ? 0 : +delay;
                        t.restart(function(elapsed) {
                            t.stop();
                            callback(elapsed + delay);
                        }, delay, time);
                        return t;
                    };

                    var interval$1 = function(callback, delay, time) {
                        var t = new Timer,
                            total = delay;
                        if (delay == null) return t.restart(callback, delay, time), t;
                        delay = +delay, time = time == null ? now() : +time;
                        t.restart(function tick(elapsed) {
                            elapsed += total;
                            t.restart(tick, total += delay, time);
                            callback(elapsed);
                        }, delay, time);
                        return t;
                    };

                    var emptyOn = dispatch("start", "end", "interrupt");
                    var emptyTween = [];

                    var CREATED = 0;
                    var SCHEDULED = 1;
                    var STARTING = 2;
                    var STARTED = 3;
                    var RUNNING = 4;
                    var ENDING = 5;
                    var ENDED = 6;

                    var schedule = function(node, name, id, index, group, timing) {
                        var schedules = node.__transition;
                        if (!schedules) node.__transition = {};
                        else if (id in schedules) return;
                        create(node, id, {
                            name: name,
                            index: index, // For context during callback.
                            group: group, // For context during callback.
                            on: emptyOn,
                            tween: emptyTween,
                            time: timing.time,
                            delay: timing.delay,
                            duration: timing.duration,
                            ease: timing.ease,
                            timer: null,
                            state: CREATED
                        });
                    };

                    function init(node, id) {
                        var schedule = node.__transition;
                        if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error("too late");
                        return schedule;
                    }

                    function set$1(node, id) {
                        var schedule = node.__transition;
                        if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error("too late");
                        return schedule;
                    }

                    function get$1(node, id) {
                        var schedule = node.__transition;
                        if (!schedule || !(schedule = schedule[id])) throw new Error("too late");
                        return schedule;
                    }

                    function create(node, id, self) {
                        var schedules = node.__transition,
                            tween;

                        // Initialize the self timer when the transition is created.
                        // Note the actual delay is not known until the first callback!
                        schedules[id] = self;
                        self.timer = timer(schedule, 0, self.time);

                        function schedule(elapsed) {
                            self.state = SCHEDULED;
                            self.timer.restart(start, self.delay, self.time);

                            // If the elapsed delay is less than our first sleep, start immediately.
                            if (self.delay <= elapsed) start(elapsed - self.delay);
                        }

                        function start(elapsed) {
                            var i, j, n, o;

                            // If the state is not SCHEDULED, then we previously errored on start.
                            if (self.state !== SCHEDULED) return stop();

                            for (i in schedules) {
                                o = schedules[i];
                                if (o.name !== self.name) continue;

                                // While this element already has a starting transition during this frame,
                                // defer starting an interrupting transition until that transition has a
                                // chance to tick (and possibly end); see d3/d3-transition#54!
                                if (o.state === STARTED) return timeout$1(start);

                                // Interrupt the active transition, if any.
                                // Dispatch the interrupt event.
                                if (o.state === RUNNING) {
                                    o.state = ENDED;
                                    o.timer.stop();
                                    o.on.call("interrupt", node, node.__data__, o.index, o.group);
                                    delete schedules[i];
                                }

                                // Cancel any pre-empted transitions. No interrupt event is dispatched
                                // because the cancelled transitions never started. Note that this also
                                // removes this transition from the pending list!
                                else if (+i < id) {
                                    o.state = ENDED;
                                    o.timer.stop();
                                    delete schedules[i];
                                }
                            }

                            // Defer the first tick to end of the current frame; see d3/d3#1576.
                            // Note the transition may be canceled after start and before the first tick!
                            // Note this must be scheduled before the start event; see d3/d3-transition#16!
                            // Assuming this is successful, subsequent callbacks go straight to tick.
                            timeout$1(function() {
                                if (self.state === STARTED) {
                                    self.state = RUNNING;
                                    self.timer.restart(tick, self.delay, self.time);
                                    tick(elapsed);
                                }
                            });

                            // Dispatch the start event.
                            // Note this must be done before the tween are initialized.
                            self.state = STARTING;
                            self.on.call("start", node, node.__data__, self.index, self.group);
                            if (self.state !== STARTING) return; // interrupted
                            self.state = STARTED;

                            // Initialize the tween, deleting null tween.
                            tween = new Array(n = self.tween.length);
                            for (i = 0, j = -1; i < n; ++i) {
                                if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
                                    tween[++j] = o;
                                }
                            }
                            tween.length = j + 1;
                        }

                        function tick(elapsed) {
                            var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
                                i = -1,
                                n = tween.length;

                            while (++i < n) {
                                tween[i].call(null, t);
                            }

                            // Dispatch the end event.
                            if (self.state === ENDING) {
                                self.on.call("end", node, node.__data__, self.index, self.group);
                                stop();
                            }
                        }

                        function stop() {
                            self.state = ENDED;
                            self.timer.stop();
                            delete schedules[id];
                            for (var i in schedules) return; // eslint-disable-line no-unused-vars
                            delete node.__transition;
                        }
                    }

                    var interrupt = function(node, name) {
                        var schedules = node.__transition,
                            schedule,
                            active,
                            empty = true,
                            i;

                        if (!schedules) return;

                        name = name == null ? null : name + "";

                        for (i in schedules) {
                            if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
                            active = schedule.state > STARTING && schedule.state < ENDING;
                            schedule.state = ENDED;
                            schedule.timer.stop();
                            if (active) schedule.on.call("interrupt", node, node.__data__, schedule.index, schedule.group);
                            delete schedules[i];
                        }

                        if (empty) delete node.__transition;
                    };

                    var selection_interrupt = function(name) {
                        return this.each(function() {
                            interrupt(this, name);
                        });
                    };

                    function tweenRemove(id, name) {
                        var tween0, tween1;
                        return function() {
                            var schedule = set$1(this, id),
                                tween = schedule.tween;

                            // If this node shared tween with the previous node,
                            // just assign the updated shared tween and we’re done!
                            // Otherwise, copy-on-write.
                            if (tween !== tween0) {
                                tween1 = tween0 = tween;
                                for (var i = 0, n = tween1.length; i < n; ++i) {
                                    if (tween1[i].name === name) {
                                        tween1 = tween1.slice();
                                        tween1.splice(i, 1);
                                        break;
                                    }
                                }
                            }

                            schedule.tween = tween1;
                        };
                    }

                    function tweenFunction(id, name, value) {
                        var tween0, tween1;
                        if (typeof value !== "function") throw new Error;
                        return function() {
                            var schedule = set$1(this, id),
                                tween = schedule.tween;

                            // If this node shared tween with the previous node,
                            // just assign the updated shared tween and we’re done!
                            // Otherwise, copy-on-write.
                            if (tween !== tween0) {
                                tween1 = (tween0 = tween).slice();
                                for (var t = { name: name, value: value }, i = 0, n = tween1.length; i < n; ++i) {
                                    if (tween1[i].name === name) {
                                        tween1[i] = t;
                                        break;
                                    }
                                }
                                if (i === n) tween1.push(t);
                            }

                            schedule.tween = tween1;
                        };
                    }

                    var transition_tween = function(name, value) {
                        var id = this._id;

                        name += "";

                        if (arguments.length < 2) {
                            var tween = get$1(this.node(), id).tween;
                            for (var i = 0, n = tween.length, t; i < n; ++i) {
                                if ((t = tween[i]).name === name) {
                                    return t.value;
                                }
                            }
                            return null;
                        }

                        return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
                    };

                    function tweenValue(transition, name, value) {
                        var id = transition._id;

                        transition.each(function() {
                            var schedule = set$1(this, id);
                            (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
                        });

                        return function(node) {
                            return get$1(node, id).value[name];
                        };
                    }

                    var interpolate$$1 = function(a, b) {
                        var c;
                        return (typeof b === "number" ? reinterpolate :
                            b instanceof color ? interpolateRgb :
                            (c = color(b)) ? (b = c, interpolateRgb) :
                            interpolateString)(a, b);
                    };

                    function attrRemove$1(name) {
                        return function() {
                            this.removeAttribute(name);
                        };
                    }

                    function attrRemoveNS$1(fullname) {
                        return function() {
                            this.removeAttributeNS(fullname.space, fullname.local);
                        };
                    }

                    function attrConstant$1(name, interpolate$$1, value1) {
                        var value00,
                            interpolate0;
                        return function() {
                            var value0 = this.getAttribute(name);
                            return value0 === value1 ? null :
                                value0 === value00 ? interpolate0 :
                                interpolate0 = interpolate$$1(value00 = value0, value1);
                        };
                    }

                    function attrConstantNS$1(fullname, interpolate$$1, value1) {
                        var value00,
                            interpolate0;
                        return function() {
                            var value0 = this.getAttributeNS(fullname.space, fullname.local);
                            return value0 === value1 ? null :
                                value0 === value00 ? interpolate0 :
                                interpolate0 = interpolate$$1(value00 = value0, value1);
                        };
                    }

                    function attrFunction$1(name, interpolate$$1, value) {
                        var value00,
                            value10,
                            interpolate0;
                        return function() {
                            var value0, value1 = value(this);
                            if (value1 == null) return void this.removeAttribute(name);
                            value0 = this.getAttribute(name);
                            return value0 === value1 ? null :
                                value0 === value00 && value1 === value10 ? interpolate0 :
                                interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
                        };
                    }

                    function attrFunctionNS$1(fullname, interpolate$$1, value) {
                        var value00,
                            value10,
                            interpolate0;
                        return function() {
                            var value0, value1 = value(this);
                            if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
                            value0 = this.getAttributeNS(fullname.space, fullname.local);
                            return value0 === value1 ? null :
                                value0 === value00 && value1 === value10 ? interpolate0 :
                                interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
                        };
                    }

                    var transition_attr = function(name, value) {
                        var fullname = namespace(name),
                            i = fullname === "transform" ? interpolateTransformSvg : interpolate$$1;
                        return this.attrTween(name, typeof value === "function" ?
                            (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value)) :
                            value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname) :
                            (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value));
                    };

                    function attrTweenNS(fullname, value) {
                        function tween() {
                            var node = this,
                                i = value.apply(node, arguments);
                            return i && function(t) {
                                node.setAttributeNS(fullname.space, fullname.local, i(t));
                            };
                        }
                        tween._value = value;
                        return tween;
                    }

                    function attrTween(name, value) {
                        function tween() {
                            var node = this,
                                i = value.apply(node, arguments);
                            return i && function(t) {
                                node.setAttribute(name, i(t));
                            };
                        }
                        tween._value = value;
                        return tween;
                    }

                    var transition_attrTween = function(name, value) {
                        var key = "attr." + name;
                        if (arguments.length < 2) return (key = this.tween(key)) && key._value;
                        if (value == null) return this.tween(key, null);
                        if (typeof value !== "function") throw new Error;
                        var fullname = namespace(name);
                        return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
                    };

                    function delayFunction(id, value) {
                        return function() {
                            init(this, id).delay = +value.apply(this, arguments);
                        };
                    }

                    function delayConstant(id, value) {
                        return value = +value,
                            function() {
                                init(this, id).delay = value;
                            };
                    }

                    var transition_delay = function(value) {
                        var id = this._id;

                        return arguments.length ?
                            this.each((typeof value === "function" ?
                                delayFunction :
                                delayConstant)(id, value)) :
                            get$1(this.node(), id).delay;
                    };

                    function durationFunction(id, value) {
                        return function() {
                            set$1(this, id).duration = +value.apply(this, arguments);
                        };
                    }

                    function durationConstant(id, value) {
                        return value = +value,
                            function() {
                                set$1(this, id).duration = value;
                            };
                    }

                    var transition_duration = function(value) {
                        var id = this._id;

                        return arguments.length ?
                            this.each((typeof value === "function" ?
                                durationFunction :
                                durationConstant)(id, value)) :
                            get$1(this.node(), id).duration;
                    };

                    function easeConstant(id, value) {
                        if (typeof value !== "function") throw new Error;
                        return function() {
                            set$1(this, id).ease = value;
                        };
                    }

                    var transition_ease = function(value) {
                        var id = this._id;

                        return arguments.length ?
                            this.each(easeConstant(id, value)) :
                            get$1(this.node(), id).ease;
                    };

                    var transition_filter = function(match) {
                        if (typeof match !== "function") match = matcher$1(match);

                        for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
                            for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
                                if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
                                    subgroup.push(node);
                                }
                            }
                        }

                        return new Transition(subgroups, this._parents, this._name, this._id);
                    };

                    var transition_merge = function(transition) {
                        if (transition._id !== this._id) throw new Error;

                        for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
                            for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
                                if (node = group0[i] || group1[i]) {
                                    merge[i] = node;
                                }
                            }
                        }

                        for (; j < m0; ++j) {
                            merges[j] = groups0[j];
                        }

                        return new Transition(merges, this._parents, this._name, this._id);
                    };

                    function start(name) {
                        return (name + "").trim().split(/^|\s+/).every(function(t) {
                            var i = t.indexOf(".");
                            if (i >= 0) t = t.slice(0, i);
                            return !t || t === "start";
                        });
                    }

                    function onFunction(id, name, listener) {
                        var on0, on1, sit = start(name) ? init : set$1;
                        return function() {
                            var schedule = sit(this, id),
                                on = schedule.on;

                            // If this node shared a dispatch with the previous node,
                            // just assign the updated shared dispatch and we’re done!
                            // Otherwise, copy-on-write.
                            if (on !== on0)(on1 = (on0 = on).copy()).on(name, listener);

                            schedule.on = on1;
                        };
                    }

                    var transition_on = function(name, listener) {
                        var id = this._id;

                        return arguments.length < 2 ?
                            get$1(this.node(), id).on.on(name) :
                            this.each(onFunction(id, name, listener));
                    };

                    function removeFunction(id) {
                        return function() {
                            var parent = this.parentNode;
                            for (var i in this.__transition)
                                if (+i !== id) return;
                            if (parent) parent.removeChild(this);
                        };
                    }

                    var transition_remove = function() {
                        return this.on("end.remove", removeFunction(this._id));
                    };

                    var transition_select = function(select$$1) {
                        var name = this._name,
                            id = this._id;

                        if (typeof select$$1 !== "function") select$$1 = selector(select$$1);

                        for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
                            for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
                                if ((node = group[i]) && (subnode = select$$1.call(node, node.__data__, i, group))) {
                                    if ("__data__" in node) subnode.__data__ = node.__data__;
                                    subgroup[i] = subnode;
                                    schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
                                }
                            }
                        }

                        return new Transition(subgroups, this._parents, name, id);
                    };

                    var transition_selectAll = function(select$$1) {
                        var name = this._name,
                            id = this._id;

                        if (typeof select$$1 !== "function") select$$1 = selectorAll(select$$1);

                        for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
                            for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
                                if (node = group[i]) {
                                    for (var children = select$$1.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
                                        if (child = children[k]) {
                                            schedule(child, name, id, k, children, inherit);
                                        }
                                    }
                                    subgroups.push(children);
                                    parents.push(node);
                                }
                            }
                        }

                        return new Transition(subgroups, parents, name, id);
                    };

                    var Selection$1 = selection.prototype.constructor;

                    var transition_selection = function() {
                        return new Selection$1(this._groups, this._parents);
                    };

                    function styleRemove$1(name, interpolate$$2) {
                        var value00,
                            value10,
                            interpolate0;
                        return function() {
                            var style = window(this).getComputedStyle(this, null),
                                value0 = style.getPropertyValue(name),
                                value1 = (this.style.removeProperty(name), style.getPropertyValue(name));
                            return value0 === value1 ? null :
                                value0 === value00 && value1 === value10 ? interpolate0 :
                                interpolate0 = interpolate$$2(value00 = value0, value10 = value1);
                        };
                    }

                    function styleRemoveEnd(name) {
                        return function() {
                            this.style.removeProperty(name);
                        };
                    }

                    function styleConstant$1(name, interpolate$$2, value1) {
                        var value00,
                            interpolate0;
                        return function() {
                            var value0 = window(this).getComputedStyle(this, null).getPropertyValue(name);
                            return value0 === value1 ? null :
                                value0 === value00 ? interpolate0 :
                                interpolate0 = interpolate$$2(value00 = value0, value1);
                        };
                    }

                    function styleFunction$1(name, interpolate$$2, value) {
                        var value00,
                            value10,
                            interpolate0;
                        return function() {
                            var style = window(this).getComputedStyle(this, null),
                                value0 = style.getPropertyValue(name),
                                value1 = value(this);
                            if (value1 == null) value1 = (this.style.removeProperty(name), style.getPropertyValue(name));
                            return value0 === value1 ? null :
                                value0 === value00 && value1 === value10 ? interpolate0 :
                                interpolate0 = interpolate$$2(value00 = value0, value10 = value1);
                        };
                    }

                    var transition_style = function(name, value, priority) {
                        var i = (name += "") === "transform" ? interpolateTransformCss : interpolate$$1;
                        return value == null ? this
                            .styleTween(name, styleRemove$1(name, i))
                            .on("end.style." + name, styleRemoveEnd(name)) :
                            this.styleTween(name, typeof value === "function" ?
                                styleFunction$1(name, i, tweenValue(this, "style." + name, value)) :
                                styleConstant$1(name, i, value), priority);
                    };

                    function styleTween(name, value, priority) {
                        function tween() {
                            var node = this,
                                i = value.apply(node, arguments);
                            return i && function(t) {
                                node.style.setProperty(name, i(t), priority);
                            };
                        }
                        tween._value = value;
                        return tween;
                    }

                    var transition_styleTween = function(name, value, priority) {
                        var key = "style." + (name += "");
                        if (arguments.length < 2) return (key = this.tween(key)) && key._value;
                        if (value == null) return this.tween(key, null);
                        if (typeof value !== "function") throw new Error;
                        return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
                    };

                    function textConstant$1(value) {
                        return function() {
                            this.textContent = value;
                        };
                    }

                    function textFunction$1(value) {
                        return function() {
                            var value1 = value(this);
                            this.textContent = value1 == null ? "" : value1;
                        };
                    }

                    var transition_text = function(value) {
                        return this.tween("text", typeof value === "function" ?
                            textFunction$1(tweenValue(this, "text", value)) :
                            textConstant$1(value == null ? "" : value + ""));
                    };

                    var transition_transition = function() {
                        var name = this._name,
                            id0 = this._id,
                            id1 = newId();

                        for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
                            for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
                                if (node = group[i]) {
                                    var inherit = get$1(node, id0);
                                    schedule(node, name, id1, i, group, {
                                        time: inherit.time + inherit.delay + inherit.duration,
                                        delay: 0,
                                        duration: inherit.duration,
                                        ease: inherit.ease
                                    });
                                }
                            }
                        }

                        return new Transition(groups, this._parents, name, id1);
                    };

                    var id = 0;

                    function Transition(groups, parents, name, id) {
                        this._groups = groups;
                        this._parents = parents;
                        this._name = name;
                        this._id = id;
                    }

                    function transition(name) {
                        return selection().transition(name);
                    }

                    function newId() {
                        return ++id;
                    }

                    var selection_prototype = selection.prototype;

                    Transition.prototype = transition.prototype = {
                        constructor: Transition,
                        select: transition_select,
                        selectAll: transition_selectAll,
                        filter: transition_filter,
                        merge: transition_merge,
                        selection: transition_selection,
                        transition: transition_transition,
                        call: selection_prototype.call,
                        nodes: selection_prototype.nodes,
                        node: selection_prototype.node,
                        size: selection_prototype.size,
                        empty: selection_prototype.empty,
                        each: selection_prototype.each,
                        on: transition_on,
                        attr: transition_attr,
                        attrTween: transition_attrTween,
                        style: transition_style,
                        styleTween: transition_styleTween,
                        text: transition_text,
                        remove: transition_remove,
                        tween: transition_tween,
                        delay: transition_delay,
                        duration: transition_duration,
                        ease: transition_ease
                    };

                    function linear$1(t) {
                        return +t;
                    }

                    function quadIn(t) {
                        return t * t;
                    }

                    function quadOut(t) {
                        return t * (2 - t);
                    }

                    function quadInOut(t) {
                        return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;
                    }

                    function cubicIn(t) {
                        return t * t * t;
                    }

                    function cubicOut(t) {
                        return --t * t * t + 1;
                    }

                    function cubicInOut(t) {
                        return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
                    }

                    var exponent = 3;

                    var polyIn = (function custom(e) {
                        e = +e;

                        function polyIn(t) {
                            return Math.pow(t, e);
                        }

                        polyIn.exponent = custom;

                        return polyIn;
                    })(exponent);

                    var polyOut = (function custom(e) {
                        e = +e;

                        function polyOut(t) {
                            return 1 - Math.pow(1 - t, e);
                        }

                        polyOut.exponent = custom;

                        return polyOut;
                    })(exponent);

                    var polyInOut = (function custom(e) {
                        e = +e;

                        function polyInOut(t) {
                            return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;
                        }

                        polyInOut.exponent = custom;

                        return polyInOut;
                    })(exponent);

                    var pi = Math.PI;
                    var halfPi = pi / 2;

                    function sinIn(t) {
                        return 1 - Math.cos(t * halfPi);
                    }

                    function sinOut(t) {
                        return Math.sin(t * halfPi);
                    }

                    function sinInOut(t) {
                        return (1 - Math.cos(pi * t)) / 2;
                    }

                    function expIn(t) {
                        return Math.pow(2, 10 * t - 10);
                    }

                    function expOut(t) {
                        return 1 - Math.pow(2, -10 * t);
                    }

                    function expInOut(t) {
                        return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;
                    }

                    function circleIn(t) {
                        return 1 - Math.sqrt(1 - t * t);
                    }

                    function circleOut(t) {
                        return Math.sqrt(1 - --t * t);
                    }

                    function circleInOut(t) {
                        return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;
                    }

                    var b1 = 4 / 11;
                    var b2 = 6 / 11;
                    var b3 = 8 / 11;
                    var b4 = 3 / 4;
                    var b5 = 9 / 11;
                    var b6 = 10 / 11;
                    var b7 = 15 / 16;
                    var b8 = 21 / 22;
                    var b9 = 63 / 64;
                    var b0 = 1 / b1 / b1;

                    function bounceIn(t) {
                        return 1 - bounceOut(1 - t);
                    }

                    function bounceOut(t) {
                        return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;
                    }

                    function bounceInOut(t) {
                        return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;
                    }

                    var overshoot = 1.70158;

                    var backIn = (function custom(s) {
                        s = +s;

                        function backIn(t) {
                            return t * t * ((s + 1) * t - s);
                        }

                        backIn.overshoot = custom;

                        return backIn;
                    })(overshoot);

                    var backOut = (function custom(s) {
                        s = +s;

                        function backOut(t) {
                            return --t * t * ((s + 1) * t + s) + 1;
                        }

                        backOut.overshoot = custom;

                        return backOut;
                    })(overshoot);

                    var backInOut = (function custom(s) {
                        s = +s;

                        function backInOut(t) {
                            return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;
                        }

                        backInOut.overshoot = custom;

                        return backInOut;
                    })(overshoot);

                    var tau = 2 * Math.PI;
                    var amplitude = 1;
                    var period = 0.3;

                    var elasticIn = (function custom(a, p) {
                        var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

                        function elasticIn(t) {
                            return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);
                        }

                        elasticIn.amplitude = function(a) { return custom(a, p * tau); };
                        elasticIn.period = function(p) { return custom(a, p); };

                        return elasticIn;
                    })(amplitude, period);

                    var elasticOut = (function custom(a, p) {
                        var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

                        function elasticOut(t) {
                            return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);
                        }

                        elasticOut.amplitude = function(a) { return custom(a, p * tau); };
                        elasticOut.period = function(p) { return custom(a, p); };

                        return elasticOut;
                    })(amplitude, period);

                    var elasticInOut = (function custom(a, p) {
                        var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

                        function elasticInOut(t) {
                            return ((t = t * 2 - 1) < 0 ?
                                a * Math.pow(2, 10 * t) * Math.sin((s - t) / p) :
                                2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;
                        }

                        elasticInOut.amplitude = function(a) { return custom(a, p * tau); };
                        elasticInOut.period = function(p) { return custom(a, p); };

                        return elasticInOut;
                    })(amplitude, period);

                    var defaultTiming = {
                        time: null, // Set on use.
                        delay: 0,
                        duration: 250,
                        ease: cubicInOut
                    };

                    function inherit(node, id) {
                        var timing;
                        while (!(timing = node.__transition) || !(timing = timing[id])) {
                            if (!(node = node.parentNode)) {
                                return defaultTiming.time = now(), defaultTiming;
                            }
                        }
                        return timing;
                    }

                    var selection_transition = function(name) {
                        var id,
                            timing;

                        if (name instanceof Transition) {
                            id = name._id, name = name._name;
                        } else {
                            id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
                        }

                        for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
                            for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
                                if (node = group[i]) {
                                    schedule(node, name, id, i, group, timing || inherit(node, id));
                                }
                            }
                        }

                        return new Transition(groups, this._parents, name, id);
                    };

                    selection.prototype.interrupt = selection_interrupt;
                    selection.prototype.transition = selection_transition;

                    var root$1 = [null];

                    var active = function(node, name) {
                        var schedules = node.__transition,
                            schedule,
                            i;

                        if (schedules) {
                            name = name == null ? null : name + "";
                            for (i in schedules) {
                                if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {
                                    return new Transition([
                                        [node]
                                    ], root$1, name, +i);
                                }
                            }
                        }

                        return null;
                    };

                    var constant$4 = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    var BrushEvent = function(target, type, selection) {
                        this.target = target;
                        this.type = type;
                        this.selection = selection;
                    };

                    function nopropagation$1() {
                        exports.event.stopImmediatePropagation();
                    }

                    var noevent$1 = function() {
                        exports.event.preventDefault();
                        exports.event.stopImmediatePropagation();
                    };

                    var MODE_DRAG = { name: "drag" };
                    var MODE_SPACE = { name: "space" };
                    var MODE_HANDLE = { name: "handle" };
                    var MODE_CENTER = { name: "center" };

                    var X = {
                        name: "x",
                        handles: ["e", "w"].map(type),
                        input: function(x, e) {
                            return x && [
                                [x[0], e[0][1]],
                                [x[1], e[1][1]]
                            ];
                        },
                        output: function(xy) { return xy && [xy[0][0], xy[1][0]]; }
                    };

                    var Y = {
                        name: "y",
                        handles: ["n", "s"].map(type),
                        input: function(y, e) {
                            return y && [
                                [e[0][0], y[0]],
                                [e[1][0], y[1]]
                            ];
                        },
                        output: function(xy) { return xy && [xy[0][1], xy[1][1]]; }
                    };

                    var XY = {
                        name: "xy",
                        handles: ["n", "e", "s", "w", "nw", "ne", "se", "sw"].map(type),
                        input: function(xy) { return xy; },
                        output: function(xy) { return xy; }
                    };

                    var cursors = {
                        overlay: "crosshair",
                        selection: "move",
                        n: "ns-resize",
                        e: "ew-resize",
                        s: "ns-resize",
                        w: "ew-resize",
                        nw: "nwse-resize",
                        ne: "nesw-resize",
                        se: "nwse-resize",
                        sw: "nesw-resize"
                    };

                    var flipX = {
                        e: "w",
                        w: "e",
                        nw: "ne",
                        ne: "nw",
                        se: "sw",
                        sw: "se"
                    };

                    var flipY = {
                        n: "s",
                        s: "n",
                        nw: "sw",
                        ne: "se",
                        se: "ne",
                        sw: "nw"
                    };

                    var signsX = {
                        overlay: +1,
                        selection: +1,
                        n: null,
                        e: +1,
                        s: null,
                        w: -1,
                        nw: -1,
                        ne: +1,
                        se: +1,
                        sw: -1
                    };

                    var signsY = {
                        overlay: +1,
                        selection: +1,
                        n: -1,
                        e: null,
                        s: +1,
                        w: null,
                        nw: -1,
                        ne: -1,
                        se: +1,
                        sw: +1
                    };

                    function type(t) {
                        return { type: t };
                    }

                    // Ignore right-click, since that should open the context menu.
                    function defaultFilter() {
                        return !exports.event.button;
                    }

                    function defaultExtent() {
                        var svg = this.ownerSVGElement || this;
                        return [
                            [0, 0],
                            [svg.width.baseVal.value, svg.height.baseVal.value]
                        ];
                    }

                    // Like d3.local, but with the name “__brush” rather than auto-generated.
                    function local$$1(node) {
                        while (!node.__brush)
                            if (!(node = node.parentNode)) return;
                        return node.__brush;
                    }

                    function empty(extent) {
                        return extent[0][0] === extent[1][0] ||
                            extent[0][1] === extent[1][1];
                    }

                    function brushSelection(node) {
                        var state = node.__brush;
                        return state ? state.dim.output(state.selection) : null;
                    }

                    function brushX() {
                        return brush$1(X);
                    }

                    function brushY() {
                        return brush$1(Y);
                    }

                    var brush = function() {
                        return brush$1(XY);
                    };

                    function brush$1(dim) {
                        var extent = defaultExtent,
                            filter = defaultFilter,
                            listeners = dispatch(brush, "start", "brush", "end"),
                            handleSize = 6,
                            touchending;

                        function brush(group) {
                            var overlay = group
                                .property("__brush", initialize)
                                .selectAll(".overlay")
                                .data([type("overlay")]);

                            overlay.enter().append("rect")
                                .attr("class", "overlay")
                                .attr("pointer-events", "all")
                                .attr("cursor", cursors.overlay)
                                .merge(overlay)
                                .each(function() {
                                    var extent = local$$1(this).extent;
                                    select(this)
                                        .attr("x", extent[0][0])
                                        .attr("y", extent[0][1])
                                        .attr("width", extent[1][0] - extent[0][0])
                                        .attr("height", extent[1][1] - extent[0][1]);
                                });

                            group.selectAll(".selection")
                                .data([type("selection")])
                                .enter().append("rect")
                                .attr("class", "selection")
                                .attr("cursor", cursors.selection)
                                .attr("fill", "#777")
                                .attr("fill-opacity", 0.3)
                                .attr("stroke", "#fff")
                                .attr("shape-rendering", "crispEdges");

                            var handle = group.selectAll(".handle")
                                .data(dim.handles, function(d) { return d.type; });

                            handle.exit().remove();

                            handle.enter().append("rect")
                                .attr("class", function(d) { return "handle handle--" + d.type; })
                                .attr("cursor", function(d) { return cursors[d.type]; });

                            group
                                .each(redraw)
                                .attr("fill", "none")
                                .attr("pointer-events", "all")
                                .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)")
                                .on("mousedown.brush touchstart.brush", started);
                        }

                        brush.move = function(group, selection$$1) {
                            if (group.selection) {
                                group
                                    .on("start.brush", function() { emitter(this, arguments).beforestart().start(); })
                                    .on("interrupt.brush end.brush", function() { emitter(this, arguments).end(); })
                                    .tween("brush", function() {
                                        var that = this,
                                            state = that.__brush,
                                            emit = emitter(that, arguments),
                                            selection0 = state.selection,
                                            selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(this, arguments) : selection$$1, state.extent),
                                            i = interpolateValue(selection0, selection1);

                                        function tween(t) {
                                            state.selection = t === 1 && empty(selection1) ? null : i(t);
                                            redraw.call(that);
                                            emit.brush();
                                        }

                                        return selection0 && selection1 ? tween : tween(1);
                                    });
                            } else {
                                group
                                    .each(function() {
                                        var that = this,
                                            args = arguments,
                                            state = that.__brush,
                                            selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(that, args) : selection$$1, state.extent),
                                            emit = emitter(that, args).beforestart();

                                        interrupt(that);
                                        state.selection = selection1 == null || empty(selection1) ? null : selection1;
                                        redraw.call(that);
                                        emit.start().brush().end();
                                    });
                            }
                        };

                        function redraw() {
                            var group = select(this),
                                selection$$1 = local$$1(this).selection;

                            if (selection$$1) {
                                group.selectAll(".selection")
                                    .style("display", null)
                                    .attr("x", selection$$1[0][0])
                                    .attr("y", selection$$1[0][1])
                                    .attr("width", selection$$1[1][0] - selection$$1[0][0])
                                    .attr("height", selection$$1[1][1] - selection$$1[0][1]);

                                group.selectAll(".handle")
                                    .style("display", null)
                                    .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection$$1[1][0] - handleSize / 2 : selection$$1[0][0] - handleSize / 2; })
                                    .attr("y", function(d) { return d.type[0] === "s" ? selection$$1[1][1] - handleSize / 2 : selection$$1[0][1] - handleSize / 2; })
                                    .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection$$1[1][0] - selection$$1[0][0] + handleSize : handleSize; })
                                    .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection$$1[1][1] - selection$$1[0][1] + handleSize : handleSize; });
                            } else {
                                group.selectAll(".selection,.handle")
                                    .style("display", "none")
                                    .attr("x", null)
                                    .attr("y", null)
                                    .attr("width", null)
                                    .attr("height", null);
                            }
                        }

                        function emitter(that, args) {
                            return that.__brush.emitter || new Emitter(that, args);
                        }

                        function Emitter(that, args) {
                            this.that = that;
                            this.args = args;
                            this.state = that.__brush;
                            this.active = 0;
                        }

                        Emitter.prototype = {
                            beforestart: function() {
                                if (++this.active === 1) this.state.emitter = this, this.starting = true;
                                return this;
                            },
                            start: function() {
                                if (this.starting) this.starting = false, this.emit("start");
                                return this;
                            },
                            brush: function() {
                                this.emit("brush");
                                return this;
                            },
                            end: function() {
                                if (--this.active === 0) delete this.state.emitter, this.emit("end");
                                return this;
                            },
                            emit: function(type) {
                                customEvent(new BrushEvent(brush, type, dim.output(this.state.selection)), listeners.apply, listeners, [type, this.that, this.args]);
                            }
                        };

                        function started() {
                            if (exports.event.touches) { if (exports.event.changedTouches.length < exports.event.touches.length) return noevent$1(); } else if (touchending) return;
                            if (!filter.apply(this, arguments)) return;

                            var that = this,
                                type = exports.event.target.__data__.type,
                                mode = (exports.event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (exports.event.altKey ? MODE_CENTER : MODE_HANDLE),
                                signX = dim === Y ? null : signsX[type],
                                signY = dim === X ? null : signsY[type],
                                state = local$$1(that),
                                extent = state.extent,
                                selection$$1 = state.selection,
                                W = extent[0][0],
                                w0, w1,
                                N = extent[0][1],
                                n0, n1,
                                E = extent[1][0],
                                e0, e1,
                                S = extent[1][1],
                                s0, s1,
                                dx,
                                dy,
                                moving,
                                shifting = signX && signY && exports.event.shiftKey,
                                lockX,
                                lockY,
                                point0 = mouse(that),
                                point = point0,
                                emit = emitter(that, arguments).beforestart();

                            if (type === "overlay") {
                                state.selection = selection$$1 = [
                                    [w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]],
                                    [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0]
                                ];
                            } else {
                                w0 = selection$$1[0][0];
                                n0 = selection$$1[0][1];
                                e0 = selection$$1[1][0];
                                s0 = selection$$1[1][1];
                            }

                            w1 = w0;
                            n1 = n0;
                            e1 = e0;
                            s1 = s0;

                            var group = select(that)
                                .attr("pointer-events", "none");

                            var overlay = group.selectAll(".overlay")
                                .attr("cursor", cursors[type]);

                            if (exports.event.touches) {
                                group
                                    .on("touchmove.brush", moved, true)
                                    .on("touchend.brush touchcancel.brush", ended, true);
                            } else {
                                var view = select(exports.event.view)
                                    .on("keydown.brush", keydowned, true)
                                    .on("keyup.brush", keyupped, true)
                                    .on("mousemove.brush", moved, true)
                                    .on("mouseup.brush", ended, true);

                                dragDisable(exports.event.view);
                            }

                            nopropagation$1();
                            interrupt(that);
                            redraw.call(that);
                            emit.start();

                            function moved() {
                                var point1 = mouse(that);
                                if (shifting && !lockX && !lockY) {
                                    if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true;
                                    else lockX = true;
                                }
                                point = point1;
                                moving = true;
                                noevent$1();
                                move();
                            }

                            function move() {
                                var t;

                                dx = point[0] - point0[0];
                                dy = point[1] - point0[1];

                                switch (mode) {
                                    case MODE_SPACE:
                                    case MODE_DRAG:
                                        {
                                            if (signX) dx = Math.max(W - w0, Math.min(E - e0, dx)),
                                            w1 = w0 + dx,
                                            e1 = e0 + dx;
                                            if (signY) dy = Math.max(N - n0, Math.min(S - s0, dy)),
                                            n1 = n0 + dy,
                                            s1 = s0 + dy;
                                            break;
                                        }
                                    case MODE_HANDLE:
                                        {
                                            if (signX < 0) dx = Math.max(W - w0, Math.min(E - w0, dx)),
                                            w1 = w0 + dx,
                                            e1 = e0;
                                            else if (signX > 0) dx = Math.max(W - e0, Math.min(E - e0, dx)),
                                            w1 = w0,
                                            e1 = e0 + dx;
                                            if (signY < 0) dy = Math.max(N - n0, Math.min(S - n0, dy)),
                                            n1 = n0 + dy,
                                            s1 = s0;
                                            else if (signY > 0) dy = Math.max(N - s0, Math.min(S - s0, dy)),
                                            n1 = n0,
                                            s1 = s0 + dy;
                                            break;
                                        }
                                    case MODE_CENTER:
                                        {
                                            if (signX) w1 = Math.max(W, Math.min(E, w0 - dx * signX)),
                                            e1 = Math.max(W, Math.min(E, e0 + dx * signX));
                                            if (signY) n1 = Math.max(N, Math.min(S, n0 - dy * signY)),
                                            s1 = Math.max(N, Math.min(S, s0 + dy * signY));
                                            break;
                                        }
                                }

                                if (e1 < w1) {
                                    signX *= -1;
                                    t = w0, w0 = e0, e0 = t;
                                    t = w1, w1 = e1, e1 = t;
                                    if (type in flipX) overlay.attr("cursor", cursors[type = flipX[type]]);
                                }

                                if (s1 < n1) {
                                    signY *= -1;
                                    t = n0, n0 = s0, s0 = t;
                                    t = n1, n1 = s1, s1 = t;
                                    if (type in flipY) overlay.attr("cursor", cursors[type = flipY[type]]);
                                }

                                if (state.selection) selection$$1 = state.selection; // May be set by brush.move!
                                if (lockX) w1 = selection$$1[0][0], e1 = selection$$1[1][0];
                                if (lockY) n1 = selection$$1[0][1], s1 = selection$$1[1][1];

                                if (selection$$1[0][0] !== w1 ||
                                    selection$$1[0][1] !== n1 ||
                                    selection$$1[1][0] !== e1 ||
                                    selection$$1[1][1] !== s1) {
                                    state.selection = [
                                        [w1, n1],
                                        [e1, s1]
                                    ];
                                    redraw.call(that);
                                    emit.brush();
                                }
                            }

                            function ended() {
                                nopropagation$1();
                                if (exports.event.touches) {
                                    if (exports.event.touches.length) return;
                                    if (touchending) clearTimeout(touchending);
                                    touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
                                    group.on("touchmove.brush touchend.brush touchcancel.brush", null);
                                } else {
                                    yesdrag(exports.event.view, moving);
                                    view.on("keydown.brush keyup.brush mousemove.brush mouseup.brush", null);
                                }
                                group.attr("pointer-events", "all");
                                overlay.attr("cursor", cursors.overlay);
                                if (state.selection) selection$$1 = state.selection; // May be set by brush.move (on start)!
                                if (empty(selection$$1)) state.selection = null, redraw.call(that);
                                emit.end();
                            }

                            function keydowned() {
                                switch (exports.event.keyCode) {
                                    case 16:
                                        { // SHIFT
                                            shifting = signX && signY;
                                            break;
                                        }
                                    case 18:
                                        { // ALT
                                            if (mode === MODE_HANDLE) {
                                                if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
                                                if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
                                                mode = MODE_CENTER;
                                                move();
                                            }
                                            break;
                                        }
                                    case 32:
                                        { // SPACE; takes priority over ALT
                                            if (mode === MODE_HANDLE || mode === MODE_CENTER) {
                                                if (signX < 0) e0 = e1 - dx;
                                                else if (signX > 0) w0 = w1 - dx;
                                                if (signY < 0) s0 = s1 - dy;
                                                else if (signY > 0) n0 = n1 - dy;
                                                mode = MODE_SPACE;
                                                overlay.attr("cursor", cursors.selection);
                                                move();
                                            }
                                            break;
                                        }
                                    default:
                                        return;
                                }
                                noevent$1();
                            }

                            function keyupped() {
                                switch (exports.event.keyCode) {
                                    case 16:
                                        { // SHIFT
                                            if (shifting) {
                                                lockX = lockY = shifting = false;
                                                move();
                                            }
                                            break;
                                        }
                                    case 18:
                                        { // ALT
                                            if (mode === MODE_CENTER) {
                                                if (signX < 0) e0 = e1;
                                                else if (signX > 0) w0 = w1;
                                                if (signY < 0) s0 = s1;
                                                else if (signY > 0) n0 = n1;
                                                mode = MODE_HANDLE;
                                                move();
                                            }
                                            break;
                                        }
                                    case 32:
                                        { // SPACE
                                            if (mode === MODE_SPACE) {
                                                if (exports.event.altKey) {
                                                    if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
                                                    if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
                                                    mode = MODE_CENTER;
                                                } else {
                                                    if (signX < 0) e0 = e1;
                                                    else if (signX > 0) w0 = w1;
                                                    if (signY < 0) s0 = s1;
                                                    else if (signY > 0) n0 = n1;
                                                    mode = MODE_HANDLE;
                                                }
                                                overlay.attr("cursor", cursors[type]);
                                                move();
                                            }
                                            break;
                                        }
                                    default:
                                        return;
                                }
                                noevent$1();
                            }
                        }

                        function initialize() {
                            var state = this.__brush || { selection: null };
                            state.extent = extent.apply(this, arguments);
                            state.dim = dim;
                            return state;
                        }

                        brush.extent = function(_) {
                            return arguments.length ? (extent = typeof _ === "function" ? _ : constant$4([
                                [+_[0][0], +_[0][1]],
                                [+_[1][0], +_[1][1]]
                            ]), brush) : extent;
                        };

                        brush.filter = function(_) {
                            return arguments.length ? (filter = typeof _ === "function" ? _ : constant$4(!!_), brush) : filter;
                        };

                        brush.handleSize = function(_) {
                            return arguments.length ? (handleSize = +_, brush) : handleSize;
                        };

                        brush.on = function() {
                            var value = listeners.on.apply(listeners, arguments);
                            return value === listeners ? brush : value;
                        };

                        return brush;
                    }

                    var cos = Math.cos;
                    var sin = Math.sin;
                    var pi$1 = Math.PI;
                    var halfPi$1 = pi$1 / 2;
                    var tau$1 = pi$1 * 2;
                    var max$1 = Math.max;

                    function compareValue(compare) {
                        return function(a, b) {
                            return compare(
                                a.source.value + a.target.value,
                                b.source.value + b.target.value
                            );
                        };
                    }

                    var chord = function() {
                        var padAngle = 0,
                            sortGroups = null,
                            sortSubgroups = null,
                            sortChords = null;

                        function chord(matrix) {
                            var n = matrix.length,
                                groupSums = [],
                                groupIndex = sequence(n),
                                subgroupIndex = [],
                                chords = [],
                                groups = chords.groups = new Array(n),
                                subgroups = new Array(n * n),
                                k,
                                x,
                                x0,
                                dx,
                                i,
                                j;

                            // Compute the sum.
                            k = 0, i = -1;
                            while (++i < n) {
                                x = 0, j = -1;
                                while (++j < n) {
                                    x += matrix[i][j];
                                }
                                groupSums.push(x);
                                subgroupIndex.push(sequence(n));
                                k += x;
                            }

                            // Sort groups…
                            if (sortGroups) groupIndex.sort(function(a, b) {
                                return sortGroups(groupSums[a], groupSums[b]);
                            });

                            // Sort subgroups…
                            if (sortSubgroups) subgroupIndex.forEach(function(d, i) {
                                d.sort(function(a, b) {
                                    return sortSubgroups(matrix[i][a], matrix[i][b]);
                                });
                            });

                            // Convert the sum to scaling factor for [0, 2pi].
                            // TODO Allow start and end angle to be specified?
                            // TODO Allow padding to be specified as percentage?
                            k = max$1(0, tau$1 - padAngle * n) / k;
                            dx = k ? padAngle : tau$1 / n;

                            // Compute the start and end angle for each group and subgroup.
                            // Note: Opera has a bug reordering object literal properties!
                            x = 0, i = -1;
                            while (++i < n) {
                                x0 = x, j = -1;
                                while (++j < n) {
                                    var di = groupIndex[i],
                                        dj = subgroupIndex[di][j],
                                        v = matrix[di][dj],
                                        a0 = x,
                                        a1 = x += v * k;
                                    subgroups[dj * n + di] = {
                                        index: di,
                                        subindex: dj,
                                        startAngle: a0,
                                        endAngle: a1,
                                        value: v
                                    };
                                }
                                groups[di] = {
                                    index: di,
                                    startAngle: x0,
                                    endAngle: x,
                                    value: groupSums[di]
                                };
                                x += dx;
                            }

                            // Generate chords for each (non-empty) subgroup-subgroup link.
                            i = -1;
                            while (++i < n) {
                                j = i - 1;
                                while (++j < n) {
                                    var source = subgroups[j * n + i],
                                        target = subgroups[i * n + j];
                                    if (source.value || target.value) {
                                        chords.push(source.value < target.value ? { source: target, target: source } : { source: source, target: target });
                                    }
                                }
                            }

                            return sortChords ? chords.sort(sortChords) : chords;
                        }

                        chord.padAngle = function(_) {
                            return arguments.length ? (padAngle = max$1(0, _), chord) : padAngle;
                        };

                        chord.sortGroups = function(_) {
                            return arguments.length ? (sortGroups = _, chord) : sortGroups;
                        };

                        chord.sortSubgroups = function(_) {
                            return arguments.length ? (sortSubgroups = _, chord) : sortSubgroups;
                        };

                        chord.sortChords = function(_) {
                            return arguments.length ? (_ == null ? sortChords = null : (sortChords = compareValue(_))._ = _, chord) : sortChords && sortChords._;
                        };

                        return chord;
                    };

                    var slice$2 = Array.prototype.slice;

                    var constant$5 = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    var pi$2 = Math.PI;
                    var tau$2 = 2 * pi$2;
                    var epsilon$1 = 1e-6;
                    var tauEpsilon = tau$2 - epsilon$1;

                    function Path() {
                        this._x0 = this._y0 = // start of current subpath
                            this._x1 = this._y1 = null; // end of current subpath
                        this._ = "";
                    }

                    function path() {
                        return new Path;
                    }

                    Path.prototype = path.prototype = {
                        constructor: Path,
                        moveTo: function(x, y) {
                            this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y);
                        },
                        closePath: function() {
                            if (this._x1 !== null) {
                                this._x1 = this._x0, this._y1 = this._y0;
                                this._ += "Z";
                            }
                        },
                        lineTo: function(x, y) {
                            this._ += "L" + (this._x1 = +x) + "," + (this._y1 = +y);
                        },
                        quadraticCurveTo: function(x1, y1, x, y) {
                            this._ += "Q" + (+x1) + "," + (+y1) + "," + (this._x1 = +x) + "," + (this._y1 = +y);
                        },
                        bezierCurveTo: function(x1, y1, x2, y2, x, y) {
                            this._ += "C" + (+x1) + "," + (+y1) + "," + (+x2) + "," + (+y2) + "," + (this._x1 = +x) + "," + (this._y1 = +y);
                        },
                        arcTo: function(x1, y1, x2, y2, r) {
                            x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;
                            var x0 = this._x1,
                                y0 = this._y1,
                                x21 = x2 - x1,
                                y21 = y2 - y1,
                                x01 = x0 - x1,
                                y01 = y0 - y1,
                                l01_2 = x01 * x01 + y01 * y01;

                            // Is the radius negative? Error.
                            if (r < 0) throw new Error("negative radius: " + r);

                            // Is this path empty? Move to (x1,y1).
                            if (this._x1 === null) {
                                this._ += "M" + (this._x1 = x1) + "," + (this._y1 = y1);
                            }

                            // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.
                            else if (!(l01_2 > epsilon$1)) {}

                            // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?
                            // Equivalently, is (x1,y1) coincident with (x2,y2)?
                            // Or, is the radius zero? Line to (x1,y1).
                            else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon$1) || !r) {
                                this._ += "L" + (this._x1 = x1) + "," + (this._y1 = y1);
                            }

                            // Otherwise, draw an arc!
                            else {
                                var x20 = x2 - x0,
                                    y20 = y2 - y0,
                                    l21_2 = x21 * x21 + y21 * y21,
                                    l20_2 = x20 * x20 + y20 * y20,
                                    l21 = Math.sqrt(l21_2),
                                    l01 = Math.sqrt(l01_2),
                                    l = r * Math.tan((pi$2 - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),
                                    t01 = l / l01,
                                    t21 = l / l21;

                                // If the start tangent is not coincident with (x0,y0), line to.
                                if (Math.abs(t01 - 1) > epsilon$1) {
                                    this._ += "L" + (x1 + t01 * x01) + "," + (y1 + t01 * y01);
                                }

                                this._ += "A" + r + "," + r + ",0,0," + (+(y01 * x20 > x01 * y20)) + "," + (this._x1 = x1 + t21 * x21) + "," + (this._y1 = y1 + t21 * y21);
                            }
                        },
                        arc: function(x, y, r, a0, a1, ccw) {
                            x = +x, y = +y, r = +r;
                            var dx = r * Math.cos(a0),
                                dy = r * Math.sin(a0),
                                x0 = x + dx,
                                y0 = y + dy,
                                cw = 1 ^ ccw,
                                da = ccw ? a0 - a1 : a1 - a0;

                            // Is the radius negative? Error.
                            if (r < 0) throw new Error("negative radius: " + r);

                            // Is this path empty? Move to (x0,y0).
                            if (this._x1 === null) {
                                this._ += "M" + x0 + "," + y0;
                            }

                            // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).
                            else if (Math.abs(this._x1 - x0) > epsilon$1 || Math.abs(this._y1 - y0) > epsilon$1) {
                                this._ += "L" + x0 + "," + y0;
                            }

                            // Is this arc empty? We’re done.
                            if (!r) return;

                            // Is this a complete circle? Draw two arcs to complete the circle.
                            if (da > tauEpsilon) {
                                this._ += "A" + r + "," + r + ",0,1," + cw + "," + (x - dx) + "," + (y - dy) + "A" + r + "," + r + ",0,1," + cw + "," + (this._x1 = x0) + "," + (this._y1 = y0);
                            }

                            // Otherwise, draw an arc!
                            else {
                                if (da < 0) da = da % tau$2 + tau$2;
                                this._ += "A" + r + "," + r + ",0," + (+(da >= pi$2)) + "," + cw + "," + (this._x1 = x + r * Math.cos(a1)) + "," + (this._y1 = y + r * Math.sin(a1));
                            }
                        },
                        rect: function(x, y, w, h) {
                            this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y) + "h" + (+w) + "v" + (+h) + "h" + (-w) + "Z";
                        },
                        toString: function() {
                            return this._;
                        }
                    };

                    function defaultSource(d) {
                        return d.source;
                    }

                    function defaultTarget(d) {
                        return d.target;
                    }

                    function defaultRadius(d) {
                        return d.radius;
                    }

                    function defaultStartAngle(d) {
                        return d.startAngle;
                    }

                    function defaultEndAngle(d) {
                        return d.endAngle;
                    }

                    var ribbon = function() {
                        var source = defaultSource,
                            target = defaultTarget,
                            radius = defaultRadius,
                            startAngle = defaultStartAngle,
                            endAngle = defaultEndAngle,
                            context = null;

                        function ribbon() {
                            var buffer,
                                argv = slice$2.call(arguments),
                                s = source.apply(this, argv),
                                t = target.apply(this, argv),
                                sr = +radius.apply(this, (argv[0] = s, argv)),
                                sa0 = startAngle.apply(this, argv) - halfPi$1,
                                sa1 = endAngle.apply(this, argv) - halfPi$1,
                                sx0 = sr * cos(sa0),
                                sy0 = sr * sin(sa0),
                                tr = +radius.apply(this, (argv[0] = t, argv)),
                                ta0 = startAngle.apply(this, argv) - halfPi$1,
                                ta1 = endAngle.apply(this, argv) - halfPi$1;

                            if (!context) context = buffer = path();

                            context.moveTo(sx0, sy0);
                            context.arc(0, 0, sr, sa0, sa1);
                            if (sa0 !== ta0 || sa1 !== ta1) { // TODO sr !== tr?
                                context.quadraticCurveTo(0, 0, tr * cos(ta0), tr * sin(ta0));
                                context.arc(0, 0, tr, ta0, ta1);
                            }
                            context.quadraticCurveTo(0, 0, sx0, sy0);
                            context.closePath();

                            if (buffer) return context = null, buffer + "" || null;
                        }

                        ribbon.radius = function(_) {
                            return arguments.length ? (radius = typeof _ === "function" ? _ : constant$5(+_), ribbon) : radius;
                        };

                        ribbon.startAngle = function(_) {
                            return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$5(+_), ribbon) : startAngle;
                        };

                        ribbon.endAngle = function(_) {
                            return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$5(+_), ribbon) : endAngle;
                        };

                        ribbon.source = function(_) {
                            return arguments.length ? (source = _, ribbon) : source;
                        };

                        ribbon.target = function(_) {
                            return arguments.length ? (target = _, ribbon) : target;
                        };

                        ribbon.context = function(_) {
                            return arguments.length ? ((context = _ == null ? null : _), ribbon) : context;
                        };

                        return ribbon;
                    };

                    var prefix = "$";

                    function Map() {}

                    Map.prototype = map$1.prototype = {
                        constructor: Map,
                        has: function(key) {
                            return (prefix + key) in this;
                        },
                        get: function(key) {
                            return this[prefix + key];
                        },
                        set: function(key, value) {
                            this[prefix + key] = value;
                            return this;
                        },
                        remove: function(key) {
                            var property = prefix + key;
                            return property in this && delete this[property];
                        },
                        clear: function() {
                            for (var property in this)
                                if (property[0] === prefix) delete this[property];
                        },
                        keys: function() {
                            var keys = [];
                            for (var property in this)
                                if (property[0] === prefix) keys.push(property.slice(1));
                            return keys;
                        },
                        values: function() {
                            var values = [];
                            for (var property in this)
                                if (property[0] === prefix) values.push(this[property]);
                            return values;
                        },
                        entries: function() {
                            var entries = [];
                            for (var property in this)
                                if (property[0] === prefix) entries.push({ key: property.slice(1), value: this[property] });
                            return entries;
                        },
                        size: function() {
                            var size = 0;
                            for (var property in this)
                                if (property[0] === prefix) ++size;
                            return size;
                        },
                        empty: function() {
                            for (var property in this)
                                if (property[0] === prefix) return false;
                            return true;
                        },
                        each: function(f) {
                            for (var property in this)
                                if (property[0] === prefix) f(this[property], property.slice(1), this);
                        }
                    };

                    function map$1(object, f) {
                        var map = new Map;

                        // Copy constructor.
                        if (object instanceof Map) object.each(function(value, key) { map.set(key, value); });

                        // Index array by numeric index or specified key function.
                        else if (Array.isArray(object)) {
                            var i = -1,
                                n = object.length,
                                o;

                            if (f == null)
                                while (++i < n) map.set(i, object[i]);
                            else
                                while (++i < n) map.set(f(o = object[i], i, object), o);
                        }

                        // Convert object to map.
                        else if (object)
                            for (var key in object) map.set(key, object[key]);

                        return map;
                    }

                    var nest = function() {
                        var keys = [],
                            sortKeys = [],
                            sortValues,
                            rollup,
                            nest;

                        function apply(array, depth, createResult, setResult) {
                            if (depth >= keys.length) return rollup != null ?
                                rollup(array) : (sortValues != null ?
                                    array.sort(sortValues) :
                                    array);

                            var i = -1,
                                n = array.length,
                                key = keys[depth++],
                                keyValue,
                                value,
                                valuesByKey = map$1(),
                                values,
                                result = createResult();

                            while (++i < n) {
                                if (values = valuesByKey.get(keyValue = key(value = array[i]) + "")) {
                                    values.push(value);
                                } else {
                                    valuesByKey.set(keyValue, [value]);
                                }
                            }

                            valuesByKey.each(function(values, key) {
                                setResult(result, key, apply(values, depth, createResult, setResult));
                            });

                            return result;
                        }

                        function entries(map, depth) {
                            if (++depth > keys.length) return map;
                            var array, sortKey = sortKeys[depth - 1];
                            if (rollup != null && depth >= keys.length) array = map.entries();
                            else array = [], map.each(function(v, k) { array.push({ key: k, values: entries(v, depth) }); });
                            return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array;
                        }

                        return nest = {
                            object: function(array) { return apply(array, 0, createObject, setObject); },
                            map: function(array) { return apply(array, 0, createMap, setMap); },
                            entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); },
                            key: function(d) { keys.push(d); return nest; },
                            sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; },
                            sortValues: function(order) { sortValues = order; return nest; },
                            rollup: function(f) { rollup = f; return nest; }
                        };
                    };

                    function createObject() {
                        return {};
                    }

                    function setObject(object, key, value) {
                        object[key] = value;
                    }

                    function createMap() {
                        return map$1();
                    }

                    function setMap(map, key, value) {
                        map.set(key, value);
                    }

                    function Set() {}

                    var proto = map$1.prototype;

                    Set.prototype = set$2.prototype = {
                        constructor: Set,
                        has: proto.has,
                        add: function(value) {
                            value += "";
                            this[prefix + value] = value;
                            return this;
                        },
                        remove: proto.remove,
                        clear: proto.clear,
                        values: proto.keys,
                        size: proto.size,
                        empty: proto.empty,
                        each: proto.each
                    };

                    function set$2(object, f) {
                        var set = new Set;

                        // Copy constructor.
                        if (object instanceof Set) object.each(function(value) { set.add(value); });

                        // Otherwise, assume it’s an array.
                        else if (object) {
                            var i = -1,
                                n = object.length;
                            if (f == null)
                                while (++i < n) set.add(object[i]);
                            else
                                while (++i < n) set.add(f(object[i], i, object));
                        }

                        return set;
                    }

                    var keys = function(map) {
                        var keys = [];
                        for (var key in map) keys.push(key);
                        return keys;
                    };

                    var values = function(map) {
                        var values = [];
                        for (var key in map) values.push(map[key]);
                        return values;
                    };

                    var entries = function(map) {
                        var entries = [];
                        for (var key in map) entries.push({ key: key, value: map[key] });
                        return entries;
                    };

                    function objectConverter(columns) {
                        return new Function("d", "return {" + columns.map(function(name, i) {
                            return JSON.stringify(name) + ": d[" + i + "]";
                        }).join(",") + "}");
                    }

                    function customConverter(columns, f) {
                        var object = objectConverter(columns);
                        return function(row, i) {
                            return f(object(row), i, columns);
                        };
                    }

                    // Compute unique columns in order of discovery.
                    function inferColumns(rows) {
                        var columnSet = Object.create(null),
                            columns = [];

                        rows.forEach(function(row) {
                            for (var column in row) {
                                if (!(column in columnSet)) {
                                    columns.push(columnSet[column] = column);
                                }
                            }
                        });

                        return columns;
                    }

                    var dsv = function(delimiter) {
                        var reFormat = new RegExp("[\"" + delimiter + "\n]"),
                            delimiterCode = delimiter.charCodeAt(0);

                        function parse(text, f) {
                            var convert, columns, rows = parseRows(text, function(row, i) {
                                if (convert) return convert(row, i - 1);
                                columns = row, convert = f ? customConverter(row, f) : objectConverter(row);
                            });
                            rows.columns = columns;
                            return rows;
                        }

                        function parseRows(text, f) {
                            var EOL = {}, // sentinel value for end-of-line
                                EOF = {}, // sentinel value for end-of-file
                                rows = [], // output rows
                                N = text.length,
                                I = 0, // current character index
                                n = 0, // the current line number
                                t, // the current token
                                eol; // is the current token followed by EOL?

                            function token() {
                                if (I >= N) return EOF; // special case: end of file
                                if (eol) return eol = false, EOL; // special case: end of line

                                // special case: quotes
                                var j = I,
                                    c;
                                if (text.charCodeAt(j) === 34) {
                                    var i = j;
                                    while (i++ < N) {
                                        if (text.charCodeAt(i) === 34) {
                                            if (text.charCodeAt(i + 1) !== 34) break;
                                            ++i;
                                        }
                                    }
                                    I = i + 2;
                                    c = text.charCodeAt(i + 1);
                                    if (c === 13) {
                                        eol = true;
                                        if (text.charCodeAt(i + 2) === 10) ++I;
                                    } else if (c === 10) {
                                        eol = true;
                                    }
                                    return text.slice(j + 1, i).replace(/""/g, "\"");
                                }

                                // common case: find next delimiter or newline
                                while (I < N) {
                                    var k = 1;
                                    c = text.charCodeAt(I++);
                                    if (c === 10) eol = true; // \n
                                    else if (c === 13) { eol = true; if (text.charCodeAt(I) === 10) ++I, ++k; } // \r|\r\n
                                    else if (c !== delimiterCode) continue;
                                    return text.slice(j, I - k);
                                }

                                // special case: last token before EOF
                                return text.slice(j);
                            }

                            while ((t = token()) !== EOF) {
                                var a = [];
                                while (t !== EOL && t !== EOF) {
                                    a.push(t);
                                    t = token();
                                }
                                if (f && (a = f(a, n++)) == null) continue;
                                rows.push(a);
                            }

                            return rows;
                        }

                        function format(rows, columns) {
                            if (columns == null) columns = inferColumns(rows);
                            return [columns.map(formatValue).join(delimiter)].concat(rows.map(function(row) {
                                return columns.map(function(column) {
                                    return formatValue(row[column]);
                                }).join(delimiter);
                            })).join("\n");
                        }

                        function formatRows(rows) {
                            return rows.map(formatRow).join("\n");
                        }

                        function formatRow(row) {
                            return row.map(formatValue).join(delimiter);
                        }

                        function formatValue(text) {
                            return text == null ? "" :
                                reFormat.test(text += "") ? "\"" + text.replace(/\"/g, "\"\"") + "\"" :
                                text;
                        }

                        return {
                            parse: parse,
                            parseRows: parseRows,
                            format: format,
                            formatRows: formatRows
                        };
                    };

                    var csv = dsv(",");

                    var csvParse = csv.parse;
                    var csvParseRows = csv.parseRows;
                    var csvFormat = csv.format;
                    var csvFormatRows = csv.formatRows;

                    var tsv = dsv("\t");

                    var tsvParse = tsv.parse;
                    var tsvParseRows = tsv.parseRows;
                    var tsvFormat = tsv.format;
                    var tsvFormatRows = tsv.formatRows;

                    var center$1 = function(x, y) {
                        var nodes;

                        if (x == null) x = 0;
                        if (y == null) y = 0;

                        function force() {
                            var i,
                                n = nodes.length,
                                node,
                                sx = 0,
                                sy = 0;

                            for (i = 0; i < n; ++i) {
                                node = nodes[i], sx += node.x, sy += node.y;
                            }

                            for (sx = sx / n - x, sy = sy / n - y, i = 0; i < n; ++i) {
                                node = nodes[i], node.x -= sx, node.y -= sy;
                            }
                        }

                        force.initialize = function(_) {
                            nodes = _;
                        };

                        force.x = function(_) {
                            return arguments.length ? (x = +_, force) : x;
                        };

                        force.y = function(_) {
                            return arguments.length ? (y = +_, force) : y;
                        };

                        return force;
                    };

                    var constant$6 = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    var jiggle = function() {
                        return (Math.random() - 0.5) * 1e-6;
                    };

                    var tree_add = function(d) {
                        var x = +this._x.call(null, d),
                            y = +this._y.call(null, d);
                        return add(this.cover(x, y), x, y, d);
                    };

                    function add(tree, x, y, d) {
                        if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points

                        var parent,
                            node = tree._root,
                            leaf = { data: d },
                            x0 = tree._x0,
                            y0 = tree._y0,
                            x1 = tree._x1,
                            y1 = tree._y1,
                            xm,
                            ym,
                            xp,
                            yp,
                            right,
                            bottom,
                            i,
                            j;

                        // If the tree is empty, initialize the root as a leaf.
                        if (!node) return tree._root = leaf, tree;

                        // Find the existing leaf for the new point, or add it.
                        while (node.length) {
                            if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm;
                            else x1 = xm;
                            if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym;
                            else y1 = ym;
                            if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;
                        }

                        // Is the new point is exactly coincident with the existing point?
                        xp = +tree._x.call(null, node.data);
                        yp = +tree._y.call(null, node.data);
                        if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;

                        // Otherwise, split the leaf node until the old and new point are separated.
                        do {
                            parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);
                            if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm;
                            else x1 = xm;
                            if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym;
                            else y1 = ym;
                        } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));
                        return parent[j] = node, parent[i] = leaf, tree;
                    }

                    function addAll(data) {
                        var d, i, n = data.length,
                            x,
                            y,
                            xz = new Array(n),
                            yz = new Array(n),
                            x0 = Infinity,
                            y0 = Infinity,
                            x1 = -Infinity,
                            y1 = -Infinity;

                        // Compute the points and their extent.
                        for (i = 0; i < n; ++i) {
                            if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;
                            xz[i] = x;
                            yz[i] = y;
                            if (x < x0) x0 = x;
                            if (x > x1) x1 = x;
                            if (y < y0) y0 = y;
                            if (y > y1) y1 = y;
                        }

                        // If there were no (valid) points, inherit the existing extent.
                        if (x1 < x0) x0 = this._x0, x1 = this._x1;
                        if (y1 < y0) y0 = this._y0, y1 = this._y1;

                        // Expand the tree to cover the new points.
                        this.cover(x0, y0).cover(x1, y1);

                        // Add the new points.
                        for (i = 0; i < n; ++i) {
                            add(this, xz[i], yz[i], data[i]);
                        }

                        return this;
                    }

                    var tree_cover = function(x, y) {
                        if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points

                        var x0 = this._x0,
                            y0 = this._y0,
                            x1 = this._x1,
                            y1 = this._y1;

                        // If the quadtree has no extent, initialize them.
                        // Integer extent are necessary so that if we later double the extent,
                        // the existing quadrant boundaries don’t change due to floating point error!
                        if (isNaN(x0)) {
                            x1 = (x0 = Math.floor(x)) + 1;
                            y1 = (y0 = Math.floor(y)) + 1;
                        }

                        // Otherwise, double repeatedly to cover.
                        else if (x0 > x || x > x1 || y0 > y || y > y1) {
                            var z = x1 - x0,
                                node = this._root,
                                parent,
                                i;

                            switch (i = (y < (y0 + y1) / 2) << 1 | (x < (x0 + x1) / 2)) {
                                case 0:
                                    {
                                        do parent = new Array(4),
                                        parent[i] = node,
                                        node = parent;
                                        while (z *= 2, x1 = x0 + z, y1 = y0 + z, x > x1 || y > y1);
                                        break;
                                    }
                                case 1:
                                    {
                                        do parent = new Array(4),
                                        parent[i] = node,
                                        node = parent;
                                        while (z *= 2, x0 = x1 - z, y1 = y0 + z, x0 > x || y > y1);
                                        break;
                                    }
                                case 2:
                                    {
                                        do parent = new Array(4),
                                        parent[i] = node,
                                        node = parent;
                                        while (z *= 2, x1 = x0 + z, y0 = y1 - z, x > x1 || y0 > y);
                                        break;
                                    }
                                case 3:
                                    {
                                        do parent = new Array(4),
                                        parent[i] = node,
                                        node = parent;
                                        while (z *= 2, x0 = x1 - z, y0 = y1 - z, x0 > x || y0 > y);
                                        break;
                                    }
                            }

                            if (this._root && this._root.length) this._root = node;
                        }

                        // If the quadtree covers the point already, just return.
                        else return this;

                        this._x0 = x0;
                        this._y0 = y0;
                        this._x1 = x1;
                        this._y1 = y1;
                        return this;
                    };

                    var tree_data = function() {
                        var data = [];
                        this.visit(function(node) {
                            if (!node.length)
                                do data.push(node.data); while (node = node.next)
                        });
                        return data;
                    };

                    var tree_extent = function(_) {
                        return arguments.length ?
                            this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1]) :
                            isNaN(this._x0) ? undefined : [
                                [this._x0, this._y0],
                                [this._x1, this._y1]
                            ];
                    };

                    var Quad = function(node, x0, y0, x1, y1) {
                        this.node = node;
                        this.x0 = x0;
                        this.y0 = y0;
                        this.x1 = x1;
                        this.y1 = y1;
                    };

                    var tree_find = function(x, y, radius) {
                        var data,
                            x0 = this._x0,
                            y0 = this._y0,
                            x1,
                            y1,
                            x2,
                            y2,
                            x3 = this._x1,
                            y3 = this._y1,
                            quads = [],
                            node = this._root,
                            q,
                            i;

                        if (node) quads.push(new Quad(node, x0, y0, x3, y3));
                        if (radius == null) radius = Infinity;
                        else {
                            x0 = x - radius, y0 = y - radius;
                            x3 = x + radius, y3 = y + radius;
                            radius *= radius;
                        }

                        while (q = quads.pop()) {

                            // Stop searching if this quadrant can’t contain a closer node.
                            if (!(node = q.node) ||
                                (x1 = q.x0) > x3 ||
                                (y1 = q.y0) > y3 ||
                                (x2 = q.x1) < x0 ||
                                (y2 = q.y1) < y0) continue;

                            // Bisect the current quadrant.
                            if (node.length) {
                                var xm = (x1 + x2) / 2,
                                    ym = (y1 + y2) / 2;

                                quads.push(
                                    new Quad(node[3], xm, ym, x2, y2),
                                    new Quad(node[2], x1, ym, xm, y2),
                                    new Quad(node[1], xm, y1, x2, ym),
                                    new Quad(node[0], x1, y1, xm, ym)
                                );

                                // Visit the closest quadrant first.
                                if (i = (y >= ym) << 1 | (x >= xm)) {
                                    q = quads[quads.length - 1];
                                    quads[quads.length - 1] = quads[quads.length - 1 - i];
                                    quads[quads.length - 1 - i] = q;
                                }
                            }

                            // Visit this point. (Visiting coincident points isn’t necessary!)
                            else {
                                var dx = x - +this._x.call(null, node.data),
                                    dy = y - +this._y.call(null, node.data),
                                    d2 = dx * dx + dy * dy;
                                if (d2 < radius) {
                                    var d = Math.sqrt(radius = d2);
                                    x0 = x - d, y0 = y - d;
                                    x3 = x + d, y3 = y + d;
                                    data = node.data;
                                }
                            }
                        }

                        return data;
                    };

                    var tree_remove = function(d) {
                        if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points

                        var parent,
                            node = this._root,
                            retainer,
                            previous,
                            next,
                            x0 = this._x0,
                            y0 = this._y0,
                            x1 = this._x1,
                            y1 = this._y1,
                            x,
                            y,
                            xm,
                            ym,
                            right,
                            bottom,
                            i,
                            j;

                        // If the tree is empty, initialize the root as a leaf.
                        if (!node) return this;

                        // Find the leaf node for the point.
                        // While descending, also retain the deepest parent with a non-removed sibling.
                        if (node.length)
                            while (true) {
                                if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm;
                                else x1 = xm;
                                if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym;
                                else y1 = ym;
                                if (!(parent = node, node = node[i = bottom << 1 | right])) return this;
                                if (!node.length) break;
                                if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;
                            }

                        // Find the point to remove.
                        while (node.data !== d)
                            if (!(previous = node, node = node.next)) return this;
                        if (next = node.next) delete node.next;

                        // If there are multiple coincident points, remove just the point.
                        if (previous) return (next ? previous.next = next : delete previous.next), this;

                        // If this is the root point, remove it.
                        if (!parent) return this._root = next, this;

                        // Remove this leaf.
                        next ? parent[i] = next : delete parent[i];

                        // If the parent now contains exactly one leaf, collapse superfluous parents.
                        if ((node = parent[0] || parent[1] || parent[2] || parent[3]) &&
                            node === (parent[3] || parent[2] || parent[1] || parent[0]) &&
                            !node.length) {
                            if (retainer) retainer[j] = node;
                            else this._root = node;
                        }

                        return this;
                    };

                    function removeAll(data) {
                        for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);
                        return this;
                    }

                    var tree_root = function() {
                        return this._root;
                    };

                    var tree_size = function() {
                        var size = 0;
                        this.visit(function(node) {
                            if (!node.length)
                                do ++size; while (node = node.next)
                        });
                        return size;
                    };

                    var tree_visit = function(callback) {
                        var quads = [],
                            q, node = this._root,
                            child, x0, y0, x1, y1;
                        if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));
                        while (q = quads.pop()) {
                            if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {
                                var xm = (x0 + x1) / 2,
                                    ym = (y0 + y1) / 2;
                                if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
                                if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
                                if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
                                if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
                            }
                        }
                        return this;
                    };

                    var tree_visitAfter = function(callback) {
                        var quads = [],
                            next = [],
                            q;
                        if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));
                        while (q = quads.pop()) {
                            var node = q.node;
                            if (node.length) {
                                var child, x0 = q.x0,
                                    y0 = q.y0,
                                    x1 = q.x1,
                                    y1 = q.y1,
                                    xm = (x0 + x1) / 2,
                                    ym = (y0 + y1) / 2;
                                if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
                                if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
                                if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
                                if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
                            }
                            next.push(q);
                        }
                        while (q = next.pop()) {
                            callback(q.node, q.x0, q.y0, q.x1, q.y1);
                        }
                        return this;
                    };

                    function defaultX(d) {
                        return d[0];
                    }

                    var tree_x = function(_) {
                        return arguments.length ? (this._x = _, this) : this._x;
                    };

                    function defaultY(d) {
                        return d[1];
                    }

                    var tree_y = function(_) {
                        return arguments.length ? (this._y = _, this) : this._y;
                    };

                    function quadtree(nodes, x, y) {
                        var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN);
                        return nodes == null ? tree : tree.addAll(nodes);
                    }

                    function Quadtree(x, y, x0, y0, x1, y1) {
                        this._x = x;
                        this._y = y;
                        this._x0 = x0;
                        this._y0 = y0;
                        this._x1 = x1;
                        this._y1 = y1;
                        this._root = undefined;
                    }

                    function leaf_copy(leaf) {
                        var copy = { data: leaf.data },
                            next = copy;
                        while (leaf = leaf.next) next = next.next = { data: leaf.data };
                        return copy;
                    }

                    var treeProto = quadtree.prototype = Quadtree.prototype;

                    treeProto.copy = function() {
                        var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),
                            node = this._root,
                            nodes,
                            child;

                        if (!node) return copy;

                        if (!node.length) return copy._root = leaf_copy(node), copy;

                        nodes = [{ source: node, target: copy._root = new Array(4) }];
                        while (node = nodes.pop()) {
                            for (var i = 0; i < 4; ++i) {
                                if (child = node.source[i]) {
                                    if (child.length) nodes.push({ source: child, target: node.target[i] = new Array(4) });
                                    else node.target[i] = leaf_copy(child);
                                }
                            }
                        }

                        return copy;
                    };

                    treeProto.add = tree_add;
                    treeProto.addAll = addAll;
                    treeProto.cover = tree_cover;
                    treeProto.data = tree_data;
                    treeProto.extent = tree_extent;
                    treeProto.find = tree_find;
                    treeProto.remove = tree_remove;
                    treeProto.removeAll = removeAll;
                    treeProto.root = tree_root;
                    treeProto.size = tree_size;
                    treeProto.visit = tree_visit;
                    treeProto.visitAfter = tree_visitAfter;
                    treeProto.x = tree_x;
                    treeProto.y = tree_y;

                    function x(d) {
                        return d.x + d.vx;
                    }

                    function y(d) {
                        return d.y + d.vy;
                    }

                    var collide = function(radius) {
                        var nodes,
                            radii,
                            strength = 1,
                            iterations = 1;

                        if (typeof radius !== "function") radius = constant$6(radius == null ? 1 : +radius);

                        function force() {
                            var i, n = nodes.length,
                                tree,
                                node,
                                xi,
                                yi,
                                ri,
                                ri2;

                            for (var k = 0; k < iterations; ++k) {
                                tree = quadtree(nodes, x, y).visitAfter(prepare);
                                for (i = 0; i < n; ++i) {
                                    node = nodes[i];
                                    ri = radii[node.index], ri2 = ri * ri;
                                    xi = node.x + node.vx;
                                    yi = node.y + node.vy;
                                    tree.visit(apply);
                                }
                            }

                            function apply(quad, x0, y0, x1, y1) {
                                var data = quad.data,
                                    rj = quad.r,
                                    r = ri + rj;
                                if (data) {
                                    if (data.index > node.index) {
                                        var x = xi - data.x - data.vx,
                                            y = yi - data.y - data.vy,
                                            l = x * x + y * y;
                                        if (l < r * r) {
                                            if (x === 0) x = jiggle(), l += x * x;
                                            if (y === 0) y = jiggle(), l += y * y;
                                            l = (r - (l = Math.sqrt(l))) / l * strength;
                                            node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj));
                                            node.vy += (y *= l) * r;
                                            data.vx -= x * (r = 1 - r);
                                            data.vy -= y * r;
                                        }
                                    }
                                    return;
                                }
                                return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r;
                            }
                        }

                        function prepare(quad) {
                            if (quad.data) return quad.r = radii[quad.data.index];
                            for (var i = quad.r = 0; i < 4; ++i) {
                                if (quad[i] && quad[i].r > quad.r) {
                                    quad.r = quad[i].r;
                                }
                            }
                        }

                        function initialize() {
                            if (!nodes) return;
                            var i, n = nodes.length,
                                node;
                            radii = new Array(n);
                            for (i = 0; i < n; ++i) node = nodes[i], radii[node.index] = +radius(node, i, nodes);
                        }

                        force.initialize = function(_) {
                            nodes = _;
                            initialize();
                        };

                        force.iterations = function(_) {
                            return arguments.length ? (iterations = +_, force) : iterations;
                        };

                        force.strength = function(_) {
                            return arguments.length ? (strength = +_, force) : strength;
                        };

                        force.radius = function(_) {
                            return arguments.length ? (radius = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : radius;
                        };

                        return force;
                    };

                    function index(d) {
                        return d.index;
                    }

                    function find(nodeById, nodeId) {
                        var node = nodeById.get(nodeId);
                        if (!node) throw new Error("missing: " + nodeId);
                        return node;
                    }

                    var link = function(links) {
                        var id = index,
                            strength = defaultStrength,
                            strengths,
                            distance = constant$6(30),
                            distances,
                            nodes,
                            count,
                            bias,
                            iterations = 1;

                        if (links == null) links = [];

                        function defaultStrength(link) {
                            return 1 / Math.min(count[link.source.index], count[link.target.index]);
                        }

                        function force(alpha) {
                            for (var k = 0, n = links.length; k < iterations; ++k) {
                                for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {
                                    link = links[i], source = link.source, target = link.target;
                                    x = target.x + target.vx - source.x - source.vx || jiggle();
                                    y = target.y + target.vy - source.y - source.vy || jiggle();
                                    l = Math.sqrt(x * x + y * y);
                                    l = (l - distances[i]) / l * alpha * strengths[i];
                                    x *= l, y *= l;
                                    target.vx -= x * (b = bias[i]);
                                    target.vy -= y * b;
                                    source.vx += x * (b = 1 - b);
                                    source.vy += y * b;
                                }
                            }
                        }

                        function initialize() {
                            if (!nodes) return;

                            var i,
                                n = nodes.length,
                                m = links.length,
                                nodeById = map$1(nodes, id),
                                link;

                            for (i = 0, count = new Array(n); i < m; ++i) {
                                link = links[i], link.index = i;
                                if (typeof link.source !== "object") link.source = find(nodeById, link.source);
                                if (typeof link.target !== "object") link.target = find(nodeById, link.target);
                                count[link.source.index] = (count[link.source.index] || 0) + 1;
                                count[link.target.index] = (count[link.target.index] || 0) + 1;
                            }

                            for (i = 0, bias = new Array(m); i < m; ++i) {
                                link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);
                            }

                            strengths = new Array(m), initializeStrength();
                            distances = new Array(m), initializeDistance();
                        }

                        function initializeStrength() {
                            if (!nodes) return;

                            for (var i = 0, n = links.length; i < n; ++i) {
                                strengths[i] = +strength(links[i], i, links);
                            }
                        }

                        function initializeDistance() {
                            if (!nodes) return;

                            for (var i = 0, n = links.length; i < n; ++i) {
                                distances[i] = +distance(links[i], i, links);
                            }
                        }

                        force.initialize = function(_) {
                            nodes = _;
                            initialize();
                        };

                        force.links = function(_) {
                            return arguments.length ? (links = _, initialize(), force) : links;
                        };

                        force.id = function(_) {
                            return arguments.length ? (id = _, force) : id;
                        };

                        force.iterations = function(_) {
                            return arguments.length ? (iterations = +_, force) : iterations;
                        };

                        force.strength = function(_) {
                            return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initializeStrength(), force) : strength;
                        };

                        force.distance = function(_) {
                            return arguments.length ? (distance = typeof _ === "function" ? _ : constant$6(+_), initializeDistance(), force) : distance;
                        };

                        return force;
                    };

                    function x$1(d) {
                        return d.x;
                    }

                    function y$1(d) {
                        return d.y;
                    }

                    var initialRadius = 10;
                    var initialAngle = Math.PI * (3 - Math.sqrt(5));

                    var simulation = function(nodes) {
                        var simulation,
                            alpha = 1,
                            alphaMin = 0.001,
                            alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),
                            alphaTarget = 0,
                            velocityDecay = 0.6,
                            forces = map$1(),
                            stepper = timer(step),
                            event = dispatch("tick", "end");

                        if (nodes == null) nodes = [];

                        function step() {
                            tick();
                            event.call("tick", simulation);
                            if (alpha < alphaMin) {
                                stepper.stop();
                                event.call("end", simulation);
                            }
                        }

                        function tick() {
                            var i, n = nodes.length,
                                node;

                            alpha += (alphaTarget - alpha) * alphaDecay;

                            forces.each(function(force) {
                                force(alpha);
                            });

                            for (i = 0; i < n; ++i) {
                                node = nodes[i];
                                if (node.fx == null) node.x += node.vx *= velocityDecay;
                                else node.x = node.fx, node.vx = 0;
                                if (node.fy == null) node.y += node.vy *= velocityDecay;
                                else node.y = node.fy, node.vy = 0;
                            }
                        }

                        function initializeNodes() {
                            for (var i = 0, n = nodes.length, node; i < n; ++i) {
                                node = nodes[i], node.index = i;
                                if (isNaN(node.x) || isNaN(node.y)) {
                                    var radius = initialRadius * Math.sqrt(i),
                                        angle = i * initialAngle;
                                    node.x = radius * Math.cos(angle);
                                    node.y = radius * Math.sin(angle);
                                }
                                if (isNaN(node.vx) || isNaN(node.vy)) {
                                    node.vx = node.vy = 0;
                                }
                            }
                        }

                        function initializeForce(force) {
                            if (force.initialize) force.initialize(nodes);
                            return force;
                        }

                        initializeNodes();

                        return simulation = {
                            tick: tick,

                            restart: function() {
                                return stepper.restart(step), simulation;
                            },

                            stop: function() {
                                return stepper.stop(), simulation;
                            },

                            nodes: function(_) {
                                return arguments.length ? (nodes = _, initializeNodes(), forces.each(initializeForce), simulation) : nodes;
                            },

                            alpha: function(_) {
                                return arguments.length ? (alpha = +_, simulation) : alpha;
                            },

                            alphaMin: function(_) {
                                return arguments.length ? (alphaMin = +_, simulation) : alphaMin;
                            },

                            alphaDecay: function(_) {
                                return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;
                            },

                            alphaTarget: function(_) {
                                return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;
                            },

                            velocityDecay: function(_) {
                                return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;
                            },

                            force: function(name, _) {
                                return arguments.length > 1 ? ((_ == null ? forces.remove(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);
                            },

                            find: function(x, y, radius) {
                                var i = 0,
                                    n = nodes.length,
                                    dx,
                                    dy,
                                    d2,
                                    node,
                                    closest;

                                if (radius == null) radius = Infinity;
                                else radius *= radius;

                                for (i = 0; i < n; ++i) {
                                    node = nodes[i];
                                    dx = x - node.x;
                                    dy = y - node.y;
                                    d2 = dx * dx + dy * dy;
                                    if (d2 < radius) closest = node, radius = d2;
                                }

                                return closest;
                            },

                            on: function(name, _) {
                                return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);
                            }
                        };
                    };

                    var manyBody = function() {
                        var nodes,
                            node,
                            alpha,
                            strength = constant$6(-30),
                            strengths,
                            distanceMin2 = 1,
                            distanceMax2 = Infinity,
                            theta2 = 0.81;

                        function force(_) {
                            var i, n = nodes.length,
                                tree = quadtree(nodes, x$1, y$1).visitAfter(accumulate);
                            for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);
                        }

                        function initialize() {
                            if (!nodes) return;
                            var i, n = nodes.length,
                                node;
                            strengths = new Array(n);
                            for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes);
                        }

                        function accumulate(quad) {
                            var strength = 0,
                                q, c, x$$1, y$$1, i;

                            // For internal nodes, accumulate forces from child quadrants.
                            if (quad.length) {
                                for (x$$1 = y$$1 = i = 0; i < 4; ++i) {
                                    if ((q = quad[i]) && (c = q.value)) {
                                        strength += c, x$$1 += c * q.x, y$$1 += c * q.y;
                                    }
                                }
                                quad.x = x$$1 / strength;
                                quad.y = y$$1 / strength;
                            }

                            // For leaf nodes, accumulate forces from coincident quadrants.
                            else {
                                q = quad;
                                q.x = q.data.x;
                                q.y = q.data.y;
                                do strength += strengths[q.data.index];
                                while (q = q.next);
                            }

                            quad.value = strength;
                        }

                        function apply(quad, x1, _, x2) {
                            if (!quad.value) return true;

                            var x$$1 = quad.x - node.x,
                                y$$1 = quad.y - node.y,
                                w = x2 - x1,
                                l = x$$1 * x$$1 + y$$1 * y$$1;

                            // Apply the Barnes-Hut approximation if possible.
                            // Limit forces for very close nodes; randomize direction if coincident.
                            if (w * w / theta2 < l) {
                                if (l < distanceMax2) {
                                    if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1;
                                    if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1;
                                    if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
                                    node.vx += x$$1 * quad.value * alpha / l;
                                    node.vy += y$$1 * quad.value * alpha / l;
                                }
                                return true;
                            }

                            // Otherwise, process points directly.
                            else if (quad.length || l >= distanceMax2) return;

                            // Limit forces for very close nodes; randomize direction if coincident.
                            if (quad.data !== node || quad.next) {
                                if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1;
                                if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1;
                                if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
                            }

                            do
                                if (quad.data !== node) {
                                    w = strengths[quad.data.index] * alpha / l;
                                    node.vx += x$$1 * w;
                                    node.vy += y$$1 * w;
                                }
                            while (quad = quad.next);
                        }

                        force.initialize = function(_) {
                            nodes = _;
                            initialize();
                        };

                        force.strength = function(_) {
                            return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
                        };

                        force.distanceMin = function(_) {
                            return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);
                        };

                        force.distanceMax = function(_) {
                            return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);
                        };

                        force.theta = function(_) {
                            return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);
                        };

                        return force;
                    };

                    var x$2 = function(x) {
                        var strength = constant$6(0.1),
                            nodes,
                            strengths,
                            xz;

                        if (typeof x !== "function") x = constant$6(x == null ? 0 : +x);

                        function force(alpha) {
                            for (var i = 0, n = nodes.length, node; i < n; ++i) {
                                node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha;
                            }
                        }

                        function initialize() {
                            if (!nodes) return;
                            var i, n = nodes.length;
                            strengths = new Array(n);
                            xz = new Array(n);
                            for (i = 0; i < n; ++i) {
                                strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
                            }
                        }

                        force.initialize = function(_) {
                            nodes = _;
                            initialize();
                        };

                        force.strength = function(_) {
                            return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
                        };

                        force.x = function(_) {
                            return arguments.length ? (x = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : x;
                        };

                        return force;
                    };

                    var y$2 = function(y) {
                        var strength = constant$6(0.1),
                            nodes,
                            strengths,
                            yz;

                        if (typeof y !== "function") y = constant$6(y == null ? 0 : +y);

                        function force(alpha) {
                            for (var i = 0, n = nodes.length, node; i < n; ++i) {
                                node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha;
                            }
                        }

                        function initialize() {
                            if (!nodes) return;
                            var i, n = nodes.length;
                            strengths = new Array(n);
                            yz = new Array(n);
                            for (i = 0; i < n; ++i) {
                                strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
                            }
                        }

                        force.initialize = function(_) {
                            nodes = _;
                            initialize();
                        };

                        force.strength = function(_) {
                            return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
                        };

                        force.y = function(_) {
                            return arguments.length ? (y = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : y;
                        };

                        return force;
                    };

                    // Computes the decimal coefficient and exponent of the specified number x with
                    // significant digits p, where x is positive and p is in [1, 21] or undefined.
                    // For example, formatDecimal(1.23) returns ["123", 0].
                    var formatDecimal = function(x, p) {
                        if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
                        var i, coefficient = x.slice(0, i);

                        // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
                        // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
                        return [
                            coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)
                        ];
                    };

                    var exponent$1 = function(x) {
                        return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;
                    };

                    var formatGroup = function(grouping, thousands) {
                        return function(value, width) {
                            var i = value.length,
                                t = [],
                                j = 0,
                                g = grouping[0],
                                length = 0;

                            while (i > 0 && g > 0) {
                                if (length + g + 1 > width) g = Math.max(1, width - length);
                                t.push(value.substring(i -= g, i + g));
                                if ((length += g + 1) > width) break;
                                g = grouping[j = (j + 1) % grouping.length];
                            }

                            return t.reverse().join(thousands);
                        };
                    };

                    var formatDefault = function(x, p) {
                        x = x.toPrecision(p);

                        out: for (var n = x.length, i = 1, i0 = -1, i1; i < n; ++i) {
                            switch (x[i]) {
                                case ".":
                                    i0 = i1 = i;
                                    break;
                                case "0":
                                    if (i0 === 0) i0 = i;
                                    i1 = i;
                                    break;
                                case "e":
                                    break out;
                                default:
                                    if (i0 > 0) i0 = 0;
                                    break;
                            }
                        }

                        return i0 > 0 ? x.slice(0, i0) + x.slice(i1 + 1) : x;
                    };

                    var prefixExponent;

                    var formatPrefixAuto = function(x, p) {
                        var d = formatDecimal(x, p);
                        if (!d) return x + "";
                        var coefficient = d[0],
                            exponent = d[1],
                            i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
                            n = coefficient.length;
                        return i === n ? coefficient :
                            i > n ? coefficient + new Array(i - n + 1).join("0") :
                            i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i) :
                            "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!
                    };

                    var formatRounded = function(x, p) {
                        var d = formatDecimal(x, p);
                        if (!d) return x + "";
                        var coefficient = d[0],
                            exponent = d[1];
                        return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient :
                            coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1) :
                            coefficient + new Array(exponent - coefficient.length + 2).join("0");
                    };

                    var formatTypes = {
                        "": formatDefault,
                        "%": function(x, p) { return (x * 100).toFixed(p); },
                        "b": function(x) { return Math.round(x).toString(2); },
                        "c": function(x) { return x + ""; },
                        "d": function(x) { return Math.round(x).toString(10); },
                        "e": function(x, p) { return x.toExponential(p); },
                        "f": function(x, p) { return x.toFixed(p); },
                        "g": function(x, p) { return x.toPrecision(p); },
                        "o": function(x) { return Math.round(x).toString(8); },
                        "p": function(x, p) { return formatRounded(x * 100, p); },
                        "r": formatRounded,
                        "s": formatPrefixAuto,
                        "X": function(x) { return Math.round(x).toString(16).toUpperCase(); },
                        "x": function(x) { return Math.round(x).toString(16); }
                    };

                    // [[fill]align][sign][symbol][0][width][,][.precision][type]
                    var re = /^(?:(.)?([<>=^]))?([+\-\( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?([a-z%])?$/i;

                    var formatSpecifier = function(specifier) {
                        return new FormatSpecifier(specifier);
                    };

                    function FormatSpecifier(specifier) {
                        if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);

                        var match,
                            fill = match[1] || " ",
                            align = match[2] || ">",
                            sign = match[3] || "-",
                            symbol = match[4] || "",
                            zero = !!match[5],
                            width = match[6] && +match[6],
                            comma = !!match[7],
                            precision = match[8] && +match[8].slice(1),
                            type = match[9] || "";

                        // The "n" type is an alias for ",g".
                        if (type === "n") comma = true, type = "g";

                        // Map invalid types to the default format.
                        else if (!formatTypes[type]) type = "";

                        // If zero fill is specified, padding goes after sign and before digits.
                        if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";

                        this.fill = fill;
                        this.align = align;
                        this.sign = sign;
                        this.symbol = symbol;
                        this.zero = zero;
                        this.width = width;
                        this.comma = comma;
                        this.precision = precision;
                        this.type = type;
                    }

                    FormatSpecifier.prototype.toString = function() {
                        return this.fill +
                            this.align +
                            this.sign +
                            this.symbol +
                            (this.zero ? "0" : "") +
                            (this.width == null ? "" : Math.max(1, this.width | 0)) +
                            (this.comma ? "," : "") +
                            (this.precision == null ? "" : "." + Math.max(0, this.precision | 0)) +
                            this.type;
                    };

                    var prefixes = ["y", "z", "a", "f", "p", "n", "\xB5", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y"];

                    function identity$3(x) {
                        return x;
                    }

                    var formatLocale = function(locale) {
                        var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3,
                            currency = locale.currency,
                            decimal = locale.decimal;

                        function newFormat(specifier) {
                            specifier = formatSpecifier(specifier);

                            var fill = specifier.fill,
                                align = specifier.align,
                                sign = specifier.sign,
                                symbol = specifier.symbol,
                                zero = specifier.zero,
                                width = specifier.width,
                                comma = specifier.comma,
                                precision = specifier.precision,
                                type = specifier.type;

                            // Compute the prefix and suffix.
                            // For SI-prefix, the suffix is lazily computed.
                            var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
                                suffix = symbol === "$" ? currency[1] : /[%p]/.test(type) ? "%" : "";

                            // What format function should we use?
                            // Is this an integer type?
                            // Can this type generate exponential notation?
                            var formatType = formatTypes[type],
                                maybeSuffix = !type || /[defgprs%]/.test(type);

                            // Set the default precision if not specified,
                            // or clamp the specified precision to the supported range.
                            // For significant precision, it must be in [1, 21].
                            // For fixed precision, it must be in [0, 20].
                            precision = precision == null ? (type ? 6 : 12) :
                                /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) :
                                Math.max(0, Math.min(20, precision));

                            function format(value) {
                                var valuePrefix = prefix,
                                    valueSuffix = suffix,
                                    i, n, c;

                                if (type === "c") {
                                    valueSuffix = formatType(value) + valueSuffix;
                                    value = "";
                                } else {
                                    value = +value;

                                    // Convert negative to positive, and compute the prefix.
                                    // Note that -0 is not less than 0, but 1 / -0 is!
                                    var valueNegative = (value < 0 || 1 / value < 0) && (value *= -1, true);

                                    // Perform the initial formatting.
                                    value = formatType(value, precision);

                                    // If the original value was negative, it may be rounded to zero during
                                    // formatting; treat this as (positive) zero.
                                    if (valueNegative) {
                                        i = -1, n = value.length;
                                        valueNegative = false;
                                        while (++i < n) {
                                            if (c = value.charCodeAt(i), (48 < c && c < 58) ||
                                                (type === "x" && 96 < c && c < 103) ||
                                                (type === "X" && 64 < c && c < 71)) {
                                                valueNegative = true;
                                                break;
                                            }
                                        }
                                    }

                                    // Compute the prefix and suffix.
                                    valuePrefix = (valueNegative ? (sign === "(" ? sign : "-") : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
                                    valueSuffix = valueSuffix + (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + (valueNegative && sign === "(" ? ")" : "");

                                    // Break the formatted value into the integer “value” part that can be
                                    // grouped, and fractional or exponential “suffix” part that is not.
                                    if (maybeSuffix) {
                                        i = -1, n = value.length;
                                        while (++i < n) {
                                            if (c = value.charCodeAt(i), 48 > c || c > 57) {
                                                valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
                                                value = value.slice(0, i);
                                                break;
                                            }
                                        }
                                    }
                                }

                                // If the fill character is not "0", grouping is applied before padding.
                                if (comma && !zero) value = group(value, Infinity);

                                // Compute the padding.
                                var length = valuePrefix.length + value.length + valueSuffix.length,
                                    padding = length < width ? new Array(width - length + 1).join(fill) : "";

                                // If the fill character is "0", grouping is applied after padding.
                                if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = "";

                                // Reconstruct the final output based on the desired alignment.
                                switch (align) {
                                    case "<":
                                        return valuePrefix + value + valueSuffix + padding;
                                    case "=":
                                        return valuePrefix + padding + value + valueSuffix;
                                    case "^":
                                        return padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
                                }
                                return padding + valuePrefix + value + valueSuffix;
                            }

                            format.toString = function() {
                                return specifier + "";
                            };

                            return format;
                        }

                        function formatPrefix(specifier, value) {
                            var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
                                e = Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3,
                                k = Math.pow(10, -e),
                                prefix = prefixes[8 + e / 3];
                            return function(value) {
                                return f(k * value) + prefix;
                            };
                        }

                        return {
                            format: newFormat,
                            formatPrefix: formatPrefix
                        };
                    };

                    var locale$1;



                    defaultLocale({
                        decimal: ".",
                        thousands: ",",
                        grouping: [3],
                        currency: ["$", ""]
                    });

                    function defaultLocale(definition) {
                        locale$1 = formatLocale(definition);
                        exports.format = locale$1.format;
                        exports.formatPrefix = locale$1.formatPrefix;
                        return locale$1;
                    }

                    var precisionFixed = function(step) {
                        return Math.max(0, -exponent$1(Math.abs(step)));
                    };

                    var precisionPrefix = function(step, value) {
                        return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3 - exponent$1(Math.abs(step)));
                    };

                    var precisionRound = function(step, max) {
                        step = Math.abs(step), max = Math.abs(max) - step;
                        return Math.max(0, exponent$1(max) - exponent$1(step)) + 1;
                    };

                    // Adds floating point numbers with twice the normal precision.
                    // Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
                    // Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)
                    // 305–363 (1997).
                    // Code adapted from GeographicLib by Charles F. F. Karney,
                    // http://geographiclib.sourceforge.net/

                    var adder = function() {
                        return new Adder;
                    };

                    function Adder() {
                        this.reset();
                    }

                    Adder.prototype = {
                        constructor: Adder,
                        reset: function() {
                            this.s = // rounded value
                                this.t = 0; // exact error
                        },
                        add: function(y) {
                            add$1(temp, y, this.t);
                            add$1(this, temp.s, this.s);
                            if (this.s) this.t += temp.t;
                            else this.s = temp.t;
                        },
                        valueOf: function() {
                            return this.s;
                        }
                    };

                    var temp = new Adder;

                    function add$1(adder, a, b) {
                        var x = adder.s = a + b,
                            bv = x - a,
                            av = x - bv;
                        adder.t = (a - av) + (b - bv);
                    }

                    var epsilon$2 = 1e-6;
                    var epsilon2$1 = 1e-12;
                    var pi$3 = Math.PI;
                    var halfPi$2 = pi$3 / 2;
                    var quarterPi = pi$3 / 4;
                    var tau$3 = pi$3 * 2;

                    var degrees$1 = 180 / pi$3;
                    var radians = pi$3 / 180;

                    var abs = Math.abs;
                    var atan = Math.atan;
                    var atan2 = Math.atan2;
                    var cos$1 = Math.cos;
                    var ceil = Math.ceil;
                    var exp = Math.exp;

                    var log = Math.log;
                    var pow = Math.pow;
                    var sin$1 = Math.sin;
                    var sign = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
                    var sqrt = Math.sqrt;
                    var tan = Math.tan;

                    function acos(x) {
                        return x > 1 ? 0 : x < -1 ? pi$3 : Math.acos(x);
                    }

                    function asin(x) {
                        return x > 1 ? halfPi$2 : x < -1 ? -halfPi$2 : Math.asin(x);
                    }

                    function haversin(x) {
                        return (x = sin$1(x / 2)) * x;
                    }

                    function noop$1() {}

                    function streamGeometry(geometry, stream) {
                        if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
                            streamGeometryType[geometry.type](geometry, stream);
                        }
                    }

                    var streamObjectType = {
                        Feature: function(feature, stream) {
                            streamGeometry(feature.geometry, stream);
                        },
                        FeatureCollection: function(object, stream) {
                            var features = object.features,
                                i = -1,
                                n = features.length;
                            while (++i < n) streamGeometry(features[i].geometry, stream);
                        }
                    };

                    var streamGeometryType = {
                        Sphere: function(object, stream) {
                            stream.sphere();
                        },
                        Point: function(object, stream) {
                            object = object.coordinates;
                            stream.point(object[0], object[1], object[2]);
                        },
                        MultiPoint: function(object, stream) {
                            var coordinates = object.coordinates,
                                i = -1,
                                n = coordinates.length;
                            while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);
                        },
                        LineString: function(object, stream) {
                            streamLine(object.coordinates, stream, 0);
                        },
                        MultiLineString: function(object, stream) {
                            var coordinates = object.coordinates,
                                i = -1,
                                n = coordinates.length;
                            while (++i < n) streamLine(coordinates[i], stream, 0);
                        },
                        Polygon: function(object, stream) {
                            streamPolygon(object.coordinates, stream);
                        },
                        MultiPolygon: function(object, stream) {
                            var coordinates = object.coordinates,
                                i = -1,
                                n = coordinates.length;
                            while (++i < n) streamPolygon(coordinates[i], stream);
                        },
                        GeometryCollection: function(object, stream) {
                            var geometries = object.geometries,
                                i = -1,
                                n = geometries.length;
                            while (++i < n) streamGeometry(geometries[i], stream);
                        }
                    };

                    function streamLine(coordinates, stream, closed) {
                        var i = -1,
                            n = coordinates.length - closed,
                            coordinate;
                        stream.lineStart();
                        while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
                        stream.lineEnd();
                    }

                    function streamPolygon(coordinates, stream) {
                        var i = -1,
                            n = coordinates.length;
                        stream.polygonStart();
                        while (++i < n) streamLine(coordinates[i], stream, 1);
                        stream.polygonEnd();
                    }

                    var geoStream = function(object, stream) {
                        if (object && streamObjectType.hasOwnProperty(object.type)) {
                            streamObjectType[object.type](object, stream);
                        } else {
                            streamGeometry(object, stream);
                        }
                    };

                    var areaRingSum = adder();

                    var areaSum = adder();
                    var lambda00;
                    var phi00;
                    var lambda0;
                    var cosPhi0;
                    var sinPhi0;

                    var areaStream = {
                        point: noop$1,
                        lineStart: noop$1,
                        lineEnd: noop$1,
                        polygonStart: function() {
                            areaRingSum.reset();
                            areaStream.lineStart = areaRingStart;
                            areaStream.lineEnd = areaRingEnd;
                        },
                        polygonEnd: function() {
                            var areaRing = +areaRingSum;
                            areaSum.add(areaRing < 0 ? tau$3 + areaRing : areaRing);
                            this.lineStart = this.lineEnd = this.point = noop$1;
                        },
                        sphere: function() {
                            areaSum.add(tau$3);
                        }
                    };

                    function areaRingStart() {
                        areaStream.point = areaPointFirst;
                    }

                    function areaRingEnd() {
                        areaPoint(lambda00, phi00);
                    }

                    function areaPointFirst(lambda, phi) {
                        areaStream.point = areaPoint;
                        lambda00 = lambda, phi00 = phi;
                        lambda *= radians, phi *= radians;
                        lambda0 = lambda, cosPhi0 = cos$1(phi = phi / 2 + quarterPi), sinPhi0 = sin$1(phi);
                    }

                    function areaPoint(lambda, phi) {
                        lambda *= radians, phi *= radians;
                        phi = phi / 2 + quarterPi; // half the angular distance from south pole

                        // Spherical excess E for a spherical triangle with vertices: south pole,
                        // previous point, current point.  Uses a formula derived from Cagnoli’s
                        // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
                        var dLambda = lambda - lambda0,
                            sdLambda = dLambda >= 0 ? 1 : -1,
                            adLambda = sdLambda * dLambda,
                            cosPhi = cos$1(phi),
                            sinPhi = sin$1(phi),
                            k = sinPhi0 * sinPhi,
                            u = cosPhi0 * cosPhi + k * cos$1(adLambda),
                            v = k * sdLambda * sin$1(adLambda);
                        areaRingSum.add(atan2(v, u));

                        // Advance the previous points.
                        lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
                    }

                    var area = function(object) {
                        areaSum.reset();
                        geoStream(object, areaStream);
                        return areaSum * 2;
                    };

                    function spherical(cartesian) {
                        return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
                    }

                    function cartesian(spherical) {
                        var lambda = spherical[0],
                            phi = spherical[1],
                            cosPhi = cos$1(phi);
                        return [cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)];
                    }

                    function cartesianDot(a, b) {
                        return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
                    }

                    function cartesianCross(a, b) {
                        return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
                    }

                    // TODO return a
                    function cartesianAddInPlace(a, b) {
                        a[0] += b[0], a[1] += b[1], a[2] += b[2];
                    }

                    function cartesianScale(vector, k) {
                        return [vector[0] * k, vector[1] * k, vector[2] * k];
                    }

                    // TODO return d
                    function cartesianNormalizeInPlace(d) {
                        var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
                        d[0] /= l, d[1] /= l, d[2] /= l;
                    }

                    var lambda0$1;
                    var phi0;
                    var lambda1;
                    var phi1;
                    var lambda2;
                    var lambda00$1;
                    var phi00$1;
                    var p0;
                    var deltaSum = adder();
                    var ranges;
                    var range;

                    var boundsStream = {
                        point: boundsPoint,
                        lineStart: boundsLineStart,
                        lineEnd: boundsLineEnd,
                        polygonStart: function() {
                            boundsStream.point = boundsRingPoint;
                            boundsStream.lineStart = boundsRingStart;
                            boundsStream.lineEnd = boundsRingEnd;
                            deltaSum.reset();
                            areaStream.polygonStart();
                        },
                        polygonEnd: function() {
                            areaStream.polygonEnd();
                            boundsStream.point = boundsPoint;
                            boundsStream.lineStart = boundsLineStart;
                            boundsStream.lineEnd = boundsLineEnd;
                            if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
                            else if (deltaSum > epsilon$2) phi1 = 90;
                            else if (deltaSum < -epsilon$2) phi0 = -90;
                            range[0] = lambda0$1, range[1] = lambda1;
                        }
                    };

                    function boundsPoint(lambda, phi) {
                        ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
                        if (phi < phi0) phi0 = phi;
                        if (phi > phi1) phi1 = phi;
                    }

                    function linePoint(lambda, phi) {
                        var p = cartesian([lambda * radians, phi * radians]);
                        if (p0) {
                            var normal = cartesianCross(p0, p),
                                equatorial = [normal[1], -normal[0], 0],
                                inflection = cartesianCross(equatorial, normal);
                            cartesianNormalizeInPlace(inflection);
                            inflection = spherical(inflection);
                            var delta = lambda - lambda2,
                                sign$$1 = delta > 0 ? 1 : -1,
                                lambdai = inflection[0] * degrees$1 * sign$$1,
                                phii,
                                antimeridian = abs(delta) > 180;
                            if (antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
                                phii = inflection[1] * degrees$1;
                                if (phii > phi1) phi1 = phii;
                            } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
                                phii = -inflection[1] * degrees$1;
                                if (phii < phi0) phi0 = phii;
                            } else {
                                if (phi < phi0) phi0 = phi;
                                if (phi > phi1) phi1 = phi;
                            }
                            if (antimeridian) {
                                if (lambda < lambda2) {
                                    if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
                                } else {
                                    if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
                                }
                            } else {
                                if (lambda1 >= lambda0$1) {
                                    if (lambda < lambda0$1) lambda0$1 = lambda;
                                    if (lambda > lambda1) lambda1 = lambda;
                                } else {
                                    if (lambda > lambda2) {
                                        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
                                    } else {
                                        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
                                    }
                                }
                            }
                        } else {
                            boundsPoint(lambda, phi);
                        }
                        p0 = p, lambda2 = lambda;
                    }

                    function boundsLineStart() {
                        boundsStream.point = linePoint;
                    }

                    function boundsLineEnd() {
                        range[0] = lambda0$1, range[1] = lambda1;
                        boundsStream.point = boundsPoint;
                        p0 = null;
                    }

                    function boundsRingPoint(lambda, phi) {
                        if (p0) {
                            var delta = lambda - lambda2;
                            deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
                        } else {
                            lambda00$1 = lambda, phi00$1 = phi;
                        }
                        areaStream.point(lambda, phi);
                        linePoint(lambda, phi);
                    }

                    function boundsRingStart() {
                        areaStream.lineStart();
                    }

                    function boundsRingEnd() {
                        boundsRingPoint(lambda00$1, phi00$1);
                        areaStream.lineEnd();
                        if (abs(deltaSum) > epsilon$2) lambda0$1 = -(lambda1 = 180);
                        range[0] = lambda0$1, range[1] = lambda1;
                        p0 = null;
                    }

                    // Finds the left-right distance between two longitudes.
                    // This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
                    // the distance between ±180° to be 360°.
                    function angle(lambda0, lambda1) {
                        return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
                    }

                    function rangeCompare(a, b) {
                        return a[0] - b[0];
                    }

                    function rangeContains(range, x) {
                        return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
                    }

                    var bounds = function(feature) {
                        var i, n, a, b, merged, deltaMax, delta;

                        phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
                        ranges = [];
                        geoStream(feature, boundsStream);

                        // First, sort ranges by their minimum longitudes.
                        if (n = ranges.length) {
                            ranges.sort(rangeCompare);

                            // Then, merge any ranges that overlap.
                            for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
                                b = ranges[i];
                                if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
                                    if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
                                    if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
                                } else {
                                    merged.push(a = b);
                                }
                            }

                            // Finally, find the largest gap between the merged ranges.
                            // The final bounding box will be the inverse of this gap.
                            for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
                                b = merged[i];
                                if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
                            }
                        }

                        ranges = range = null;

                        return lambda0$1 === Infinity || phi0 === Infinity ? [
                            [NaN, NaN],
                            [NaN, NaN]
                        ] : [
                            [lambda0$1, phi0],
                            [lambda1, phi1]
                        ];
                    };

                    var W0;
                    var W1;
                    var X0;
                    var Y0;
                    var Z0;
                    var X1;
                    var Y1;
                    var Z1;
                    var X2;
                    var Y2;
                    var Z2;
                    var lambda00$2;
                    var phi00$2;
                    var x0;
                    var y0;
                    var z0; // previous point

                    var centroidStream = {
                        sphere: noop$1,
                        point: centroidPoint,
                        lineStart: centroidLineStart,
                        lineEnd: centroidLineEnd,
                        polygonStart: function() {
                            centroidStream.lineStart = centroidRingStart;
                            centroidStream.lineEnd = centroidRingEnd;
                        },
                        polygonEnd: function() {
                            centroidStream.lineStart = centroidLineStart;
                            centroidStream.lineEnd = centroidLineEnd;
                        }
                    };

                    // Arithmetic mean of Cartesian vectors.
                    function centroidPoint(lambda, phi) {
                        lambda *= radians, phi *= radians;
                        var cosPhi = cos$1(phi);
                        centroidPointCartesian(cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi));
                    }

                    function centroidPointCartesian(x, y, z) {
                        ++W0;
                        X0 += (x - X0) / W0;
                        Y0 += (y - Y0) / W0;
                        Z0 += (z - Z0) / W0;
                    }

                    function centroidLineStart() {
                        centroidStream.point = centroidLinePointFirst;
                    }

                    function centroidLinePointFirst(lambda, phi) {
                        lambda *= radians, phi *= radians;
                        var cosPhi = cos$1(phi);
                        x0 = cosPhi * cos$1(lambda);
                        y0 = cosPhi * sin$1(lambda);
                        z0 = sin$1(phi);
                        centroidStream.point = centroidLinePoint;
                        centroidPointCartesian(x0, y0, z0);
                    }

                    function centroidLinePoint(lambda, phi) {
                        lambda *= radians, phi *= radians;
                        var cosPhi = cos$1(phi),
                            x = cosPhi * cos$1(lambda),
                            y = cosPhi * sin$1(lambda),
                            z = sin$1(phi),
                            w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
                        W1 += w;
                        X1 += w * (x0 + (x0 = x));
                        Y1 += w * (y0 + (y0 = y));
                        Z1 += w * (z0 + (z0 = z));
                        centroidPointCartesian(x0, y0, z0);
                    }

                    function centroidLineEnd() {
                        centroidStream.point = centroidPoint;
                    }

                    // See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
                    // J. Applied Mechanics 42, 239 (1975).
                    function centroidRingStart() {
                        centroidStream.point = centroidRingPointFirst;
                    }

                    function centroidRingEnd() {
                        centroidRingPoint(lambda00$2, phi00$2);
                        centroidStream.point = centroidPoint;
                    }

                    function centroidRingPointFirst(lambda, phi) {
                        lambda00$2 = lambda, phi00$2 = phi;
                        lambda *= radians, phi *= radians;
                        centroidStream.point = centroidRingPoint;
                        var cosPhi = cos$1(phi);
                        x0 = cosPhi * cos$1(lambda);
                        y0 = cosPhi * sin$1(lambda);
                        z0 = sin$1(phi);
                        centroidPointCartesian(x0, y0, z0);
                    }

                    function centroidRingPoint(lambda, phi) {
                        lambda *= radians, phi *= radians;
                        var cosPhi = cos$1(phi),
                            x = cosPhi * cos$1(lambda),
                            y = cosPhi * sin$1(lambda),
                            z = sin$1(phi),
                            cx = y0 * z - z0 * y,
                            cy = z0 * x - x0 * z,
                            cz = x0 * y - y0 * x,
                            m = sqrt(cx * cx + cy * cy + cz * cz),
                            u = x0 * x + y0 * y + z0 * z,
                            v = m && -acos(u) / m, // area weight
                            w = atan2(m, u); // line weight
                        X2 += v * cx;
                        Y2 += v * cy;
                        Z2 += v * cz;
                        W1 += w;
                        X1 += w * (x0 + (x0 = x));
                        Y1 += w * (y0 + (y0 = y));
                        Z1 += w * (z0 + (z0 = z));
                        centroidPointCartesian(x0, y0, z0);
                    }

                    var centroid = function(object) {
                        W0 = W1 =
                            X0 = Y0 = Z0 =
                            X1 = Y1 = Z1 =
                            X2 = Y2 = Z2 = 0;
                        geoStream(object, centroidStream);

                        var x = X2,
                            y = Y2,
                            z = Z2,
                            m = x * x + y * y + z * z;

                        // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
                        if (m < epsilon2$1) {
                            x = X1, y = Y1, z = Z1;
                            // If the feature has zero length, fall back to arithmetic mean of point vectors.
                            if (W1 < epsilon$2) x = X0, y = Y0, z = Z0;
                            m = x * x + y * y + z * z;
                            // If the feature still has an undefined ccentroid, then return.
                            if (m < epsilon2$1) return [NaN, NaN];
                        }

                        return [atan2(y, x) * degrees$1, asin(z / sqrt(m)) * degrees$1];
                    };

                    var constant$7 = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    var compose = function(a, b) {

                        function compose(x, y) {
                            return x = a(x, y), b(x[0], x[1]);
                        }

                        if (a.invert && b.invert) compose.invert = function(x, y) {
                            return x = b.invert(x, y), x && a.invert(x[0], x[1]);
                        };

                        return compose;
                    };

                    function rotationIdentity(lambda, phi) {
                        return [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];
                    }

                    rotationIdentity.invert = rotationIdentity;

                    function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
                        return (deltaLambda %= tau$3) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma)) :
                                rotationLambda(deltaLambda)) :
                            (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma) :
                                rotationIdentity);
                    }

                    function forwardRotationLambda(deltaLambda) {
                        return function(lambda, phi) {
                            return lambda += deltaLambda, [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];
                        };
                    }

                    function rotationLambda(deltaLambda) {
                        var rotation = forwardRotationLambda(deltaLambda);
                        rotation.invert = forwardRotationLambda(-deltaLambda);
                        return rotation;
                    }

                    function rotationPhiGamma(deltaPhi, deltaGamma) {
                        var cosDeltaPhi = cos$1(deltaPhi),
                            sinDeltaPhi = sin$1(deltaPhi),
                            cosDeltaGamma = cos$1(deltaGamma),
                            sinDeltaGamma = sin$1(deltaGamma);

                        function rotation(lambda, phi) {
                            var cosPhi = cos$1(phi),
                                x = cos$1(lambda) * cosPhi,
                                y = sin$1(lambda) * cosPhi,
                                z = sin$1(phi),
                                k = z * cosDeltaPhi + x * sinDeltaPhi;
                            return [
                                atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
                                asin(k * cosDeltaGamma + y * sinDeltaGamma)
                            ];
                        }

                        rotation.invert = function(lambda, phi) {
                            var cosPhi = cos$1(phi),
                                x = cos$1(lambda) * cosPhi,
                                y = sin$1(lambda) * cosPhi,
                                z = sin$1(phi),
                                k = z * cosDeltaGamma - y * sinDeltaGamma;
                            return [
                                atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
                                asin(k * cosDeltaPhi - x * sinDeltaPhi)
                            ];
                        };

                        return rotation;
                    }

                    var rotation = function(rotate) {
                        rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);

                        function forward(coordinates) {
                            coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
                            return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
                        }

                        forward.invert = function(coordinates) {
                            coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
                            return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
                        };

                        return forward;
                    };

                    // Generates a circle centered at [0°, 0°], with a given radius and precision.
                    function circleStream(stream, radius, delta, direction, t0, t1) {
                        if (!delta) return;
                        var cosRadius = cos$1(radius),
                            sinRadius = sin$1(radius),
                            step = direction * delta;
                        if (t0 == null) {
                            t0 = radius + direction * tau$3;
                            t1 = radius - step / 2;
                        } else {
                            t0 = circleRadius(cosRadius, t0);
                            t1 = circleRadius(cosRadius, t1);
                            if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau$3;
                        }
                        for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
                            point = spherical([cosRadius, -sinRadius * cos$1(t), -sinRadius * sin$1(t)]);
                            stream.point(point[0], point[1]);
                        }
                    }

                    // Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
                    function circleRadius(cosRadius, point) {
                        point = cartesian(point), point[0] -= cosRadius;
                        cartesianNormalizeInPlace(point);
                        var radius = acos(-point[1]);
                        return ((-point[2] < 0 ? -radius : radius) + tau$3 - epsilon$2) % tau$3;
                    }

                    var circle = function() {
                        var center = constant$7([0, 0]),
                            radius = constant$7(90),
                            precision = constant$7(6),
                            ring,
                            rotate,
                            stream = { point: point };

                        function point(x, y) {
                            ring.push(x = rotate(x, y));
                            x[0] *= degrees$1, x[1] *= degrees$1;
                        }

                        function circle() {
                            var c = center.apply(this, arguments),
                                r = radius.apply(this, arguments) * radians,
                                p = precision.apply(this, arguments) * radians;
                            ring = [];
                            rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;
                            circleStream(stream, r, p, 1);
                            c = { type: "Polygon", coordinates: [ring] };
                            ring = rotate = null;
                            return c;
                        }

                        circle.center = function(_) {
                            return arguments.length ? (center = typeof _ === "function" ? _ : constant$7([+_[0], +_[1]]), circle) : center;
                        };

                        circle.radius = function(_) {
                            return arguments.length ? (radius = typeof _ === "function" ? _ : constant$7(+_), circle) : radius;
                        };

                        circle.precision = function(_) {
                            return arguments.length ? (precision = typeof _ === "function" ? _ : constant$7(+_), circle) : precision;
                        };

                        return circle;
                    };

                    var clipBuffer = function() {
                        var lines = [],
                            line;
                        return {
                            point: function(x, y) {
                                line.push([x, y]);
                            },
                            lineStart: function() {
                                lines.push(line = []);
                            },
                            lineEnd: noop$1,
                            rejoin: function() {
                                if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
                            },
                            result: function() {
                                var result = lines;
                                lines = [];
                                line = null;
                                return result;
                            }
                        };
                    };

                    var clipLine = function(a, b, x0, y0, x1, y1) {
                        var ax = a[0],
                            ay = a[1],
                            bx = b[0],
                            by = b[1],
                            t0 = 0,
                            t1 = 1,
                            dx = bx - ax,
                            dy = by - ay,
                            r;

                        r = x0 - ax;
                        if (!dx && r > 0) return;
                        r /= dx;
                        if (dx < 0) {
                            if (r < t0) return;
                            if (r < t1) t1 = r;
                        } else if (dx > 0) {
                            if (r > t1) return;
                            if (r > t0) t0 = r;
                        }

                        r = x1 - ax;
                        if (!dx && r < 0) return;
                        r /= dx;
                        if (dx < 0) {
                            if (r > t1) return;
                            if (r > t0) t0 = r;
                        } else if (dx > 0) {
                            if (r < t0) return;
                            if (r < t1) t1 = r;
                        }

                        r = y0 - ay;
                        if (!dy && r > 0) return;
                        r /= dy;
                        if (dy < 0) {
                            if (r < t0) return;
                            if (r < t1) t1 = r;
                        } else if (dy > 0) {
                            if (r > t1) return;
                            if (r > t0) t0 = r;
                        }

                        r = y1 - ay;
                        if (!dy && r < 0) return;
                        r /= dy;
                        if (dy < 0) {
                            if (r > t1) return;
                            if (r > t0) t0 = r;
                        } else if (dy > 0) {
                            if (r < t0) return;
                            if (r < t1) t1 = r;
                        }

                        if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
                        if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
                        return true;
                    };

                    var pointEqual = function(a, b) {
                        return abs(a[0] - b[0]) < epsilon$2 && abs(a[1] - b[1]) < epsilon$2;
                    };

                    function Intersection(point, points, other, entry) {
                        this.x = point;
                        this.z = points;
                        this.o = other; // another intersection
                        this.e = entry; // is an entry?
                        this.v = false; // visited
                        this.n = this.p = null; // next & previous
                    }

                    // A generalized polygon clipping algorithm: given a polygon that has been cut
                    // into its visible line segments, and rejoins the segments by interpolating
                    // along the clip edge.
                    var clipPolygon = function(segments, compareIntersection, startInside, interpolate, stream) {
                        var subject = [],
                            clip = [],
                            i,
                            n;

                        segments.forEach(function(segment) {
                            if ((n = segment.length - 1) <= 0) return;
                            var n, p0 = segment[0],
                                p1 = segment[n],
                                x;

                            // If the first and last points of a segment are coincident, then treat as a
                            // closed ring. TODO if all rings are closed, then the winding order of the
                            // exterior ring should be checked.
                            if (pointEqual(p0, p1)) {
                                stream.lineStart();
                                for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);
                                stream.lineEnd();
                                return;
                            }

                            subject.push(x = new Intersection(p0, segment, null, true));
                            clip.push(x.o = new Intersection(p0, null, x, false));
                            subject.push(x = new Intersection(p1, segment, null, false));
                            clip.push(x.o = new Intersection(p1, null, x, true));
                        });

                        if (!subject.length) return;

                        clip.sort(compareIntersection);
                        link$1(subject);
                        link$1(clip);

                        for (i = 0, n = clip.length; i < n; ++i) {
                            clip[i].e = startInside = !startInside;
                        }

                        var start = subject[0],
                            points,
                            point;

                        while (1) {
                            // Find first unvisited intersection.
                            var current = start,
                                isSubject = true;
                            while (current.v)
                                if ((current = current.n) === start) return;
                            points = current.z;
                            stream.lineStart();
                            do {
                                current.v = current.o.v = true;
                                if (current.e) {
                                    if (isSubject) {
                                        for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);
                                    } else {
                                        interpolate(current.x, current.n.x, 1, stream);
                                    }
                                    current = current.n;
                                } else {
                                    if (isSubject) {
                                        points = current.p.z;
                                        for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);
                                    } else {
                                        interpolate(current.x, current.p.x, -1, stream);
                                    }
                                    current = current.p;
                                }
                                current = current.o;
                                points = current.z;
                                isSubject = !isSubject;
                            } while (!current.v);
                            stream.lineEnd();
                        }
                    };

                    function link$1(array) {
                        if (!(n = array.length)) return;
                        var n,
                            i = 0,
                            a = array[0],
                            b;
                        while (++i < n) {
                            a.n = b = array[i];
                            b.p = a;
                            a = b;
                        }
                        a.n = b = array[0];
                        b.p = a;
                    }

                    var clipMax = 1e9;
                    var clipMin = -clipMax;

                    // TODO Use d3-polygon’s polygonContains here for the ring check?
                    // TODO Eliminate duplicate buffering in clipBuffer and polygon.push?

                    function clipExtent(x0, y0, x1, y1) {

                        function visible(x, y) {
                            return x0 <= x && x <= x1 && y0 <= y && y <= y1;
                        }

                        function interpolate(from, to, direction, stream) {
                            var a = 0,
                                a1 = 0;
                            if (from == null ||
                                (a = corner(from, direction)) !== (a1 = corner(to, direction)) ||
                                comparePoint(from, to) < 0 ^ direction > 0) {
                                do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
                                while ((a = (a + direction + 4) % 4) !== a1);
                            } else {
                                stream.point(to[0], to[1]);
                            }
                        }

                        function corner(p, direction) {
                            return abs(p[0] - x0) < epsilon$2 ? direction > 0 ? 0 : 3 :
                                abs(p[0] - x1) < epsilon$2 ? direction > 0 ? 2 : 1 :
                                abs(p[1] - y0) < epsilon$2 ? direction > 0 ? 1 : 0 :
                                direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
                        }

                        function compareIntersection(a, b) {
                            return comparePoint(a.x, b.x);
                        }

                        function comparePoint(a, b) {
                            var ca = corner(a, 1),
                                cb = corner(b, 1);
                            return ca !== cb ? ca - cb :
                                ca === 0 ? b[1] - a[1] :
                                ca === 1 ? a[0] - b[0] :
                                ca === 2 ? a[1] - b[1] :
                                b[0] - a[0];
                        }

                        return function(stream) {
                            var activeStream = stream,
                                bufferStream = clipBuffer(),
                                segments,
                                polygon,
                                ring,
                                x__, y__, v__, // first point
                                x_, y_, v_, // previous point
                                first,
                                clean;

                            var clipStream = {
                                point: point,
                                lineStart: lineStart,
                                lineEnd: lineEnd,
                                polygonStart: polygonStart,
                                polygonEnd: polygonEnd
                            };

                            function point(x, y) {
                                if (visible(x, y)) activeStream.point(x, y);
                            }

                            function polygonInside() {
                                var winding = 0;

                                for (var i = 0, n = polygon.length; i < n; ++i) {
                                    for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
                                        a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
                                        if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; } else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; }
                                    }
                                }

                                return winding;
                            }

                            // Buffer geometry within a polygon and then clip it en masse.
                            function polygonStart() {
                                activeStream = bufferStream, segments = [], polygon = [], clean = true;
                            }

                            function polygonEnd() {
                                var startInside = polygonInside(),
                                    cleanInside = clean && startInside,
                                    visible = (segments = merge(segments)).length;
                                if (cleanInside || visible) {
                                    stream.polygonStart();
                                    if (cleanInside) {
                                        stream.lineStart();
                                        interpolate(null, null, 1, stream);
                                        stream.lineEnd();
                                    }
                                    if (visible) {
                                        clipPolygon(segments, compareIntersection, startInside, interpolate, stream);
                                    }
                                    stream.polygonEnd();
                                }
                                activeStream = stream, segments = polygon = ring = null;
                            }

                            function lineStart() {
                                clipStream.point = linePoint;
                                if (polygon) polygon.push(ring = []);
                                first = true;
                                v_ = false;
                                x_ = y_ = NaN;
                            }

                            // TODO rather than special-case polygons, simply handle them separately.
                            // Ideally, coincident intersection points should be jittered to avoid
                            // clipping issues.
                            function lineEnd() {
                                if (segments) {
                                    linePoint(x__, y__);
                                    if (v__ && v_) bufferStream.rejoin();
                                    segments.push(bufferStream.result());
                                }
                                clipStream.point = point;
                                if (v_) activeStream.lineEnd();
                            }

                            function linePoint(x, y) {
                                var v = visible(x, y);
                                if (polygon) ring.push([x, y]);
                                if (first) {
                                    x__ = x, y__ = y, v__ = v;
                                    first = false;
                                    if (v) {
                                        activeStream.lineStart();
                                        activeStream.point(x, y);
                                    }
                                } else {
                                    if (v && v_) activeStream.point(x, y);
                                    else {
                                        var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
                                            b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
                                        if (clipLine(a, b, x0, y0, x1, y1)) {
                                            if (!v_) {
                                                activeStream.lineStart();
                                                activeStream.point(a[0], a[1]);
                                            }
                                            activeStream.point(b[0], b[1]);
                                            if (!v) activeStream.lineEnd();
                                            clean = false;
                                        } else if (v) {
                                            activeStream.lineStart();
                                            activeStream.point(x, y);
                                            clean = false;
                                        }
                                    }
                                }
                                x_ = x, y_ = y, v_ = v;
                            }

                            return clipStream;
                        };
                    }

                    var extent$1 = function() {
                        var x0 = 0,
                            y0 = 0,
                            x1 = 960,
                            y1 = 500,
                            cache,
                            cacheStream,
                            clip;

                        return clip = {
                            stream: function(stream) {
                                return cache && cacheStream === stream ? cache : cache = clipExtent(x0, y0, x1, y1)(cacheStream = stream);
                            },
                            extent: function(_) {
                                return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [
                                    [x0, y0],
                                    [x1, y1]
                                ];
                            }
                        };
                    };

                    var lengthSum = adder();
                    var lambda0$2;
                    var sinPhi0$1;
                    var cosPhi0$1;

                    var lengthStream = {
                        sphere: noop$1,
                        point: noop$1,
                        lineStart: lengthLineStart,
                        lineEnd: noop$1,
                        polygonStart: noop$1,
                        polygonEnd: noop$1
                    };

                    function lengthLineStart() {
                        lengthStream.point = lengthPointFirst;
                        lengthStream.lineEnd = lengthLineEnd;
                    }

                    function lengthLineEnd() {
                        lengthStream.point = lengthStream.lineEnd = noop$1;
                    }

                    function lengthPointFirst(lambda, phi) {
                        lambda *= radians, phi *= radians;
                        lambda0$2 = lambda, sinPhi0$1 = sin$1(phi), cosPhi0$1 = cos$1(phi);
                        lengthStream.point = lengthPoint;
                    }

                    function lengthPoint(lambda, phi) {
                        lambda *= radians, phi *= radians;
                        var sinPhi = sin$1(phi),
                            cosPhi = cos$1(phi),
                            delta = abs(lambda - lambda0$2),
                            cosDelta = cos$1(delta),
                            sinDelta = sin$1(delta),
                            x = cosPhi * sinDelta,
                            y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
                            z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
                        lengthSum.add(atan2(sqrt(x * x + y * y), z));
                        lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
                    }

                    var length$1 = function(object) {
                        lengthSum.reset();
                        geoStream(object, lengthStream);
                        return +lengthSum;
                    };

                    var coordinates = [null, null];
                    var object$1 = { type: "LineString", coordinates: coordinates };

                    var distance = function(a, b) {
                        coordinates[0] = a;
                        coordinates[1] = b;
                        return length$1(object$1);
                    };

                    function graticuleX(y0, y1, dy) {
                        var y = sequence(y0, y1 - epsilon$2, dy).concat(y1);
                        return function(x) { return y.map(function(y) { return [x, y]; }); };
                    }

                    function graticuleY(x0, x1, dx) {
                        var x = sequence(x0, x1 - epsilon$2, dx).concat(x1);
                        return function(y) { return x.map(function(x) { return [x, y]; }); };
                    }

                    function graticule() {
                        var x1, x0, X1, X0,
                            y1, y0, Y1, Y0,
                            dx = 10,
                            dy = dx,
                            DX = 90,
                            DY = 360,
                            x, y, X, Y,
                            precision = 2.5;

                        function graticule() {
                            return { type: "MultiLineString", coordinates: lines() };
                        }

                        function lines() {
                            return sequence(ceil(X0 / DX) * DX, X1, DX).map(X)
                                .concat(sequence(ceil(Y0 / DY) * DY, Y1, DY).map(Y))
                                .concat(sequence(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs(x % DX) > epsilon$2; }).map(x))
                                .concat(sequence(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs(y % DY) > epsilon$2; }).map(y));
                        }

                        graticule.lines = function() {
                            return lines().map(function(coordinates) { return { type: "LineString", coordinates: coordinates }; });
                        };

                        graticule.outline = function() {
                            return {
                                type: "Polygon",
                                coordinates: [
                                    X(X0).concat(
                                        Y(Y1).slice(1),
                                        X(X1).reverse().slice(1),
                                        Y(Y0).reverse().slice(1))
                                ]
                            };
                        };

                        graticule.extent = function(_) {
                            if (!arguments.length) return graticule.extentMinor();
                            return graticule.extentMajor(_).extentMinor(_);
                        };

                        graticule.extentMajor = function(_) {
                            if (!arguments.length) return [
                                [X0, Y0],
                                [X1, Y1]
                            ];
                            X0 = +_[0][0], X1 = +_[1][0];
                            Y0 = +_[0][1], Y1 = +_[1][1];
                            if (X0 > X1) _ = X0, X0 = X1, X1 = _;
                            if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;
                            return graticule.precision(precision);
                        };

                        graticule.extentMinor = function(_) {
                            if (!arguments.length) return [
                                [x0, y0],
                                [x1, y1]
                            ];
                            x0 = +_[0][0], x1 = +_[1][0];
                            y0 = +_[0][1], y1 = +_[1][1];
                            if (x0 > x1) _ = x0, x0 = x1, x1 = _;
                            if (y0 > y1) _ = y0, y0 = y1, y1 = _;
                            return graticule.precision(precision);
                        };

                        graticule.step = function(_) {
                            if (!arguments.length) return graticule.stepMinor();
                            return graticule.stepMajor(_).stepMinor(_);
                        };

                        graticule.stepMajor = function(_) {
                            if (!arguments.length) return [DX, DY];
                            DX = +_[0], DY = +_[1];
                            return graticule;
                        };

                        graticule.stepMinor = function(_) {
                            if (!arguments.length) return [dx, dy];
                            dx = +_[0], dy = +_[1];
                            return graticule;
                        };

                        graticule.precision = function(_) {
                            if (!arguments.length) return precision;
                            precision = +_;
                            x = graticuleX(y0, y1, 90);
                            y = graticuleY(x0, x1, precision);
                            X = graticuleX(Y0, Y1, 90);
                            Y = graticuleY(X0, X1, precision);
                            return graticule;
                        };

                        return graticule
                            .extentMajor([
                                [-180, -90 + epsilon$2],
                                [180, 90 - epsilon$2]
                            ])
                            .extentMinor([
                                [-180, -80 - epsilon$2],
                                [180, 80 + epsilon$2]
                            ]);
                    }

                    function graticule10() {
                        return graticule()();
                    }

                    var interpolate$1 = function(a, b) {
                        var x0 = a[0] * radians,
                            y0 = a[1] * radians,
                            x1 = b[0] * radians,
                            y1 = b[1] * radians,
                            cy0 = cos$1(y0),
                            sy0 = sin$1(y0),
                            cy1 = cos$1(y1),
                            sy1 = sin$1(y1),
                            kx0 = cy0 * cos$1(x0),
                            ky0 = cy0 * sin$1(x0),
                            kx1 = cy1 * cos$1(x1),
                            ky1 = cy1 * sin$1(x1),
                            d = 2 * asin(sqrt(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))),
                            k = sin$1(d);

                        var interpolate = d ? function(t) {
                            var B = sin$1(t *= d) / k,
                                A = sin$1(d - t) / k,
                                x = A * kx0 + B * kx1,
                                y = A * ky0 + B * ky1,
                                z = A * sy0 + B * sy1;
                            return [
                                atan2(y, x) * degrees$1,
                                atan2(z, sqrt(x * x + y * y)) * degrees$1
                            ];
                        } : function() {
                            return [x0 * degrees$1, y0 * degrees$1];
                        };

                        interpolate.distance = d;

                        return interpolate;
                    };

                    var identity$4 = function(x) {
                        return x;
                    };

                    var areaSum$1 = adder();
                    var areaRingSum$1 = adder();
                    var x00;
                    var y00;
                    var x0$1;
                    var y0$1;

                    var areaStream$1 = {
                        point: noop$1,
                        lineStart: noop$1,
                        lineEnd: noop$1,
                        polygonStart: function() {
                            areaStream$1.lineStart = areaRingStart$1;
                            areaStream$1.lineEnd = areaRingEnd$1;
                        },
                        polygonEnd: function() {
                            areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$1;
                            areaSum$1.add(abs(areaRingSum$1));
                            areaRingSum$1.reset();
                        },
                        result: function() {
                            var area = areaSum$1 / 2;
                            areaSum$1.reset();
                            return area;
                        }
                    };

                    function areaRingStart$1() {
                        areaStream$1.point = areaPointFirst$1;
                    }

                    function areaPointFirst$1(x, y) {
                        areaStream$1.point = areaPoint$1;
                        x00 = x0$1 = x, y00 = y0$1 = y;
                    }

                    function areaPoint$1(x, y) {
                        areaRingSum$1.add(y0$1 * x - x0$1 * y);
                        x0$1 = x, y0$1 = y;
                    }

                    function areaRingEnd$1() {
                        areaPoint$1(x00, y00);
                    }

                    var x0$2 = Infinity;
                    var y0$2 = x0$2;
                    var x1 = -x0$2;
                    var y1 = x1;

                    var boundsStream$1 = {
                        point: boundsPoint$1,
                        lineStart: noop$1,
                        lineEnd: noop$1,
                        polygonStart: noop$1,
                        polygonEnd: noop$1,
                        result: function() {
                            var bounds = [
                                [x0$2, y0$2],
                                [x1, y1]
                            ];
                            x1 = y1 = -(y0$2 = x0$2 = Infinity);
                            return bounds;
                        }
                    };

                    function boundsPoint$1(x, y) {
                        if (x < x0$2) x0$2 = x;
                        if (x > x1) x1 = x;
                        if (y < y0$2) y0$2 = y;
                        if (y > y1) y1 = y;
                    }

                    // TODO Enforce positive area for exterior, negative area for interior?

                    var X0$1 = 0;
                    var Y0$1 = 0;
                    var Z0$1 = 0;
                    var X1$1 = 0;
                    var Y1$1 = 0;
                    var Z1$1 = 0;
                    var X2$1 = 0;
                    var Y2$1 = 0;
                    var Z2$1 = 0;
                    var x00$1;
                    var y00$1;
                    var x0$3;
                    var y0$3;

                    var centroidStream$1 = {
                        point: centroidPoint$1,
                        lineStart: centroidLineStart$1,
                        lineEnd: centroidLineEnd$1,
                        polygonStart: function() {
                            centroidStream$1.lineStart = centroidRingStart$1;
                            centroidStream$1.lineEnd = centroidRingEnd$1;
                        },
                        polygonEnd: function() {
                            centroidStream$1.point = centroidPoint$1;
                            centroidStream$1.lineStart = centroidLineStart$1;
                            centroidStream$1.lineEnd = centroidLineEnd$1;
                        },
                        result: function() {
                            var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1] :
                                Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1] :
                                Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1] : [NaN, NaN];
                            X0$1 = Y0$1 = Z0$1 =
                                X1$1 = Y1$1 = Z1$1 =
                                X2$1 = Y2$1 = Z2$1 = 0;
                            return centroid;
                        }
                    };

                    function centroidPoint$1(x, y) {
                        X0$1 += x;
                        Y0$1 += y;
                        ++Z0$1;
                    }

                    function centroidLineStart$1() {
                        centroidStream$1.point = centroidPointFirstLine;
                    }

                    function centroidPointFirstLine(x, y) {
                        centroidStream$1.point = centroidPointLine;
                        centroidPoint$1(x0$3 = x, y0$3 = y);
                    }

                    function centroidPointLine(x, y) {
                        var dx = x - x0$3,
                            dy = y - y0$3,
                            z = sqrt(dx * dx + dy * dy);
                        X1$1 += z * (x0$3 + x) / 2;
                        Y1$1 += z * (y0$3 + y) / 2;
                        Z1$1 += z;
                        centroidPoint$1(x0$3 = x, y0$3 = y);
                    }

                    function centroidLineEnd$1() {
                        centroidStream$1.point = centroidPoint$1;
                    }

                    function centroidRingStart$1() {
                        centroidStream$1.point = centroidPointFirstRing;
                    }

                    function centroidRingEnd$1() {
                        centroidPointRing(x00$1, y00$1);
                    }

                    function centroidPointFirstRing(x, y) {
                        centroidStream$1.point = centroidPointRing;
                        centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
                    }

                    function centroidPointRing(x, y) {
                        var dx = x - x0$3,
                            dy = y - y0$3,
                            z = sqrt(dx * dx + dy * dy);

                        X1$1 += z * (x0$3 + x) / 2;
                        Y1$1 += z * (y0$3 + y) / 2;
                        Z1$1 += z;

                        z = y0$3 * x - x0$3 * y;
                        X2$1 += z * (x0$3 + x);
                        Y2$1 += z * (y0$3 + y);
                        Z2$1 += z * 3;
                        centroidPoint$1(x0$3 = x, y0$3 = y);
                    }

                    function PathContext(context) {
                        this._context = context;
                    }

                    PathContext.prototype = {
                        _radius: 4.5,
                        pointRadius: function(_) {
                            return this._radius = _, this;
                        },
                        polygonStart: function() {
                            this._line = 0;
                        },
                        polygonEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._point = 0;
                        },
                        lineEnd: function() {
                            if (this._line === 0) this._context.closePath();
                            this._point = NaN;
                        },
                        point: function(x, y) {
                            switch (this._point) {
                                case 0:
                                    {
                                        this._context.moveTo(x, y);
                                        this._point = 1;
                                        break;
                                    }
                                case 1:
                                    {
                                        this._context.lineTo(x, y);
                                        break;
                                    }
                                default:
                                    {
                                        this._context.moveTo(x + this._radius, y);
                                        this._context.arc(x, y, this._radius, 0, tau$3);
                                        break;
                                    }
                            }
                        },
                        result: noop$1
                    };

                    function PathString() {
                        this._string = [];
                    }

                    PathString.prototype = {
                        _circle: circle$1(4.5),
                        pointRadius: function(_) {
                            return this._circle = circle$1(_), this;
                        },
                        polygonStart: function() {
                            this._line = 0;
                        },
                        polygonEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._point = 0;
                        },
                        lineEnd: function() {
                            if (this._line === 0) this._string.push("Z");
                            this._point = NaN;
                        },
                        point: function(x, y) {
                            switch (this._point) {
                                case 0:
                                    {
                                        this._string.push("M", x, ",", y);
                                        this._point = 1;
                                        break;
                                    }
                                case 1:
                                    {
                                        this._string.push("L", x, ",", y);
                                        break;
                                    }
                                default:
                                    {
                                        this._string.push("M", x, ",", y, this._circle);
                                        break;
                                    }
                            }
                        },
                        result: function() {
                            if (this._string.length) {
                                var result = this._string.join("");
                                this._string = [];
                                return result;
                            }
                        }
                    };

                    function circle$1(radius) {
                        return "m0," + radius +
                            "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius +
                            "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius +
                            "z";
                    }

                    var index$1 = function(projection, context) {
                        var pointRadius = 4.5,
                            projectionStream,
                            contextStream;

                        function path(object) {
                            if (object) {
                                if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
                                geoStream(object, projectionStream(contextStream));
                            }
                            return contextStream.result();
                        }

                        path.area = function(object) {
                            geoStream(object, projectionStream(areaStream$1));
                            return areaStream$1.result();
                        };

                        path.bounds = function(object) {
                            geoStream(object, projectionStream(boundsStream$1));
                            return boundsStream$1.result();
                        };

                        path.centroid = function(object) {
                            geoStream(object, projectionStream(centroidStream$1));
                            return centroidStream$1.result();
                        };

                        path.projection = function(_) {
                            return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;
                        };

                        path.context = function(_) {
                            if (!arguments.length) return context;
                            contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _);
                            if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
                            return path;
                        };

                        path.pointRadius = function(_) {
                            if (!arguments.length) return pointRadius;
                            pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
                            return path;
                        };

                        return path.projection(projection).context(context);
                    };

                    var sum$1 = adder();

                    var polygonContains = function(polygon, point) {
                        var lambda = point[0],
                            phi = point[1],
                            normal = [sin$1(lambda), -cos$1(lambda), 0],
                            angle = 0,
                            winding = 0;

                        sum$1.reset();

                        for (var i = 0, n = polygon.length; i < n; ++i) {
                            if (!(m = (ring = polygon[i]).length)) continue;
                            var ring,
                                m,
                                point0 = ring[m - 1],
                                lambda0 = point0[0],
                                phi0 = point0[1] / 2 + quarterPi,
                                sinPhi0 = sin$1(phi0),
                                cosPhi0 = cos$1(phi0);

                            for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
                                var point1 = ring[j],
                                    lambda1 = point1[0],
                                    phi1 = point1[1] / 2 + quarterPi,
                                    sinPhi1 = sin$1(phi1),
                                    cosPhi1 = cos$1(phi1),
                                    delta = lambda1 - lambda0,
                                    sign$$1 = delta >= 0 ? 1 : -1,
                                    absDelta = sign$$1 * delta,
                                    antimeridian = absDelta > pi$3,
                                    k = sinPhi0 * sinPhi1;

                                sum$1.add(atan2(k * sign$$1 * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));
                                angle += antimeridian ? delta + sign$$1 * tau$3 : delta;

                                // Are the longitudes either side of the point’s meridian (lambda),
                                // and are the latitudes smaller than the parallel (phi)?
                                if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
                                    var arc = cartesianCross(cartesian(point0), cartesian(point1));
                                    cartesianNormalizeInPlace(arc);
                                    var intersection = cartesianCross(normal, arc);
                                    cartesianNormalizeInPlace(intersection);
                                    var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
                                    if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
                                        winding += antimeridian ^ delta >= 0 ? 1 : -1;
                                    }
                                }
                            }
                        }

                        // First, determine whether the South pole is inside or outside:
                        //
                        // It is inside if:
                        // * the polygon winds around it in a clockwise direction.
                        // * the polygon does not (cumulatively) wind around it, but has a negative
                        //   (counter-clockwise) area.
                        //
                        // Second, count the (signed) number of times a segment crosses a lambda
                        // from the point to the South pole.  If it is zero, then the point is the
                        // same side as the South pole.

                        return (angle < -epsilon$2 || angle < epsilon$2 && sum$1 < -epsilon$2) ^ (winding & 1);
                    };

                    var clip = function(pointVisible, clipLine, interpolate, start) {
                        return function(rotate, sink) {
                            var line = clipLine(sink),
                                rotatedStart = rotate.invert(start[0], start[1]),
                                ringBuffer = clipBuffer(),
                                ringSink = clipLine(ringBuffer),
                                polygonStarted = false,
                                polygon,
                                segments,
                                ring;

                            var clip = {
                                point: point,
                                lineStart: lineStart,
                                lineEnd: lineEnd,
                                polygonStart: function() {
                                    clip.point = pointRing;
                                    clip.lineStart = ringStart;
                                    clip.lineEnd = ringEnd;
                                    segments = [];
                                    polygon = [];
                                },
                                polygonEnd: function() {
                                    clip.point = point;
                                    clip.lineStart = lineStart;
                                    clip.lineEnd = lineEnd;
                                    segments = merge(segments);
                                    var startInside = polygonContains(polygon, rotatedStart);
                                    if (segments.length) {
                                        if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
                                        clipPolygon(segments, compareIntersection, startInside, interpolate, sink);
                                    } else if (startInside) {
                                        if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
                                        sink.lineStart();
                                        interpolate(null, null, 1, sink);
                                        sink.lineEnd();
                                    }
                                    if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
                                    segments = polygon = null;
                                },
                                sphere: function() {
                                    sink.polygonStart();
                                    sink.lineStart();
                                    interpolate(null, null, 1, sink);
                                    sink.lineEnd();
                                    sink.polygonEnd();
                                }
                            };

                            function point(lambda, phi) {
                                var point = rotate(lambda, phi);
                                if (pointVisible(lambda = point[0], phi = point[1])) sink.point(lambda, phi);
                            }

                            function pointLine(lambda, phi) {
                                var point = rotate(lambda, phi);
                                line.point(point[0], point[1]);
                            }

                            function lineStart() {
                                clip.point = pointLine;
                                line.lineStart();
                            }

                            function lineEnd() {
                                clip.point = point;
                                line.lineEnd();
                            }

                            function pointRing(lambda, phi) {
                                ring.push([lambda, phi]);
                                var point = rotate(lambda, phi);
                                ringSink.point(point[0], point[1]);
                            }

                            function ringStart() {
                                ringSink.lineStart();
                                ring = [];
                            }

                            function ringEnd() {
                                pointRing(ring[0][0], ring[0][1]);
                                ringSink.lineEnd();

                                var clean = ringSink.clean(),
                                    ringSegments = ringBuffer.result(),
                                    i, n = ringSegments.length,
                                    m,
                                    segment,
                                    point;

                                ring.pop();
                                polygon.push(ring);
                                ring = null;

                                if (!n) return;

                                // No intersections.
                                if (clean & 1) {
                                    segment = ringSegments[0];
                                    if ((m = segment.length - 1) > 0) {
                                        if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
                                        sink.lineStart();
                                        for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);
                                        sink.lineEnd();
                                    }
                                    return;
                                }

                                // Rejoin connected segments.
                                // TODO reuse ringBuffer.rejoin()?
                                if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));

                                segments.push(ringSegments.filter(validSegment));
                            }

                            return clip;
                        };
                    };

                    function validSegment(segment) {
                        return segment.length > 1;
                    }

                    // Intersections are sorted along the clip edge. For both antimeridian cutting
                    // and circle clipping, the same comparison is used.
                    function compareIntersection(a, b) {
                        return ((a = a.x)[0] < 0 ? a[1] - halfPi$2 - epsilon$2 : halfPi$2 - a[1]) -
                            ((b = b.x)[0] < 0 ? b[1] - halfPi$2 - epsilon$2 : halfPi$2 - b[1]);
                    }

                    var clipAntimeridian = clip(
                        function() { return true; },
                        clipAntimeridianLine,
                        clipAntimeridianInterpolate, [-pi$3, -halfPi$2]
                    );

                    // Takes a line and cuts into visible segments. Return values: 0 - there were
                    // intersections or the line was empty; 1 - no intersections; 2 - there were
                    // intersections, and the first and last segments should be rejoined.
                    function clipAntimeridianLine(stream) {
                        var lambda0 = NaN,
                            phi0 = NaN,
                            sign0 = NaN,
                            clean; // no intersections

                        return {
                            lineStart: function() {
                                stream.lineStart();
                                clean = 1;
                            },
                            point: function(lambda1, phi1) {
                                var sign1 = lambda1 > 0 ? pi$3 : -pi$3,
                                    delta = abs(lambda1 - lambda0);
                                if (abs(delta - pi$3) < epsilon$2) { // line crosses a pole
                                    stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi$2 : -halfPi$2);
                                    stream.point(sign0, phi0);
                                    stream.lineEnd();
                                    stream.lineStart();
                                    stream.point(sign1, phi0);
                                    stream.point(lambda1, phi0);
                                    clean = 0;
                                } else if (sign0 !== sign1 && delta >= pi$3) { // line crosses antimeridian
                                    if (abs(lambda0 - sign0) < epsilon$2) lambda0 -= sign0 * epsilon$2; // handle degeneracies
                                    if (abs(lambda1 - sign1) < epsilon$2) lambda1 -= sign1 * epsilon$2;
                                    phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
                                    stream.point(sign0, phi0);
                                    stream.lineEnd();
                                    stream.lineStart();
                                    stream.point(sign1, phi0);
                                    clean = 0;
                                }
                                stream.point(lambda0 = lambda1, phi0 = phi1);
                                sign0 = sign1;
                            },
                            lineEnd: function() {
                                stream.lineEnd();
                                lambda0 = phi0 = NaN;
                            },
                            clean: function() {
                                return 2 - clean; // if intersections, rejoin first and last segments
                            }
                        };
                    }

                    function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
                        var cosPhi0,
                            cosPhi1,
                            sinLambda0Lambda1 = sin$1(lambda0 - lambda1);
                        return abs(sinLambda0Lambda1) > epsilon$2 ?
                            atan((sin$1(phi0) * (cosPhi1 = cos$1(phi1)) * sin$1(lambda1) -
                                    sin$1(phi1) * (cosPhi0 = cos$1(phi0)) * sin$1(lambda0)) /
                                (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) :
                            (phi0 + phi1) / 2;
                    }

                    function clipAntimeridianInterpolate(from, to, direction, stream) {
                        var phi;
                        if (from == null) {
                            phi = direction * halfPi$2;
                            stream.point(-pi$3, phi);
                            stream.point(0, phi);
                            stream.point(pi$3, phi);
                            stream.point(pi$3, 0);
                            stream.point(pi$3, -phi);
                            stream.point(0, -phi);
                            stream.point(-pi$3, -phi);
                            stream.point(-pi$3, 0);
                            stream.point(-pi$3, phi);
                        } else if (abs(from[0] - to[0]) > epsilon$2) {
                            var lambda = from[0] < to[0] ? pi$3 : -pi$3;
                            phi = direction * lambda / 2;
                            stream.point(-lambda, phi);
                            stream.point(0, phi);
                            stream.point(lambda, phi);
                        } else {
                            stream.point(to[0], to[1]);
                        }
                    }

                    var clipCircle = function(radius, delta) {
                        var cr = cos$1(radius),
                            smallRadius = cr > 0,
                            notHemisphere = abs(cr) > epsilon$2; // TODO optimise for this common case

                        function interpolate(from, to, direction, stream) {
                            circleStream(stream, radius, delta, direction, from, to);
                        }

                        function visible(lambda, phi) {
                            return cos$1(lambda) * cos$1(phi) > cr;
                        }

                        // Takes a line and cuts into visible segments. Return values used for polygon
                        // clipping: 0 - there were intersections or the line was empty; 1 - no
                        // intersections 2 - there were intersections, and the first and last segments
                        // should be rejoined.
                        function clipLine(stream) {
                            var point0, // previous point
                                c0, // code for previous point
                                v0, // visibility of previous point
                                v00, // visibility of first point
                                clean; // no intersections
                            return {
                                lineStart: function() {
                                    v00 = v0 = false;
                                    clean = 1;
                                },
                                point: function(lambda, phi) {
                                    var point1 = [lambda, phi],
                                        point2,
                                        v = visible(lambda, phi),
                                        c = smallRadius ?
                                        v ? 0 : code(lambda, phi) :
                                        v ? code(lambda + (lambda < 0 ? pi$3 : -pi$3), phi) : 0;
                                    if (!point0 && (v00 = v0 = v)) stream.lineStart();
                                    // Handle degeneracies.
                                    // TODO ignore if not clipping polygons.
                                    if (v !== v0) {
                                        point2 = intersect(point0, point1);
                                        if (pointEqual(point0, point2) || pointEqual(point1, point2)) {
                                            point1[0] += epsilon$2;
                                            point1[1] += epsilon$2;
                                            v = visible(point1[0], point1[1]);
                                        }
                                    }
                                    if (v !== v0) {
                                        clean = 0;
                                        if (v) {
                                            // outside going in
                                            stream.lineStart();
                                            point2 = intersect(point1, point0);
                                            stream.point(point2[0], point2[1]);
                                        } else {
                                            // inside going out
                                            point2 = intersect(point0, point1);
                                            stream.point(point2[0], point2[1]);
                                            stream.lineEnd();
                                        }
                                        point0 = point2;
                                    } else if (notHemisphere && point0 && smallRadius ^ v) {
                                        var t;
                                        // If the codes for two points are different, or are both zero,
                                        // and there this segment intersects with the small circle.
                                        if (!(c & c0) && (t = intersect(point1, point0, true))) {
                                            clean = 0;
                                            if (smallRadius) {
                                                stream.lineStart();
                                                stream.point(t[0][0], t[0][1]);
                                                stream.point(t[1][0], t[1][1]);
                                                stream.lineEnd();
                                            } else {
                                                stream.point(t[1][0], t[1][1]);
                                                stream.lineEnd();
                                                stream.lineStart();
                                                stream.point(t[0][0], t[0][1]);
                                            }
                                        }
                                    }
                                    if (v && (!point0 || !pointEqual(point0, point1))) {
                                        stream.point(point1[0], point1[1]);
                                    }
                                    point0 = point1, v0 = v, c0 = c;
                                },
                                lineEnd: function() {
                                    if (v0) stream.lineEnd();
                                    point0 = null;
                                },
                                // Rejoin first and last segments if there were intersections and the first
                                // and last points were visible.
                                clean: function() {
                                    return clean | ((v00 && v0) << 1);
                                }
                            };
                        }

                        // Intersects the great circle between a and b with the clip circle.
                        function intersect(a, b, two) {
                            var pa = cartesian(a),
                                pb = cartesian(b);

                            // We have two planes, n1.p = d1 and n2.p = d2.
                            // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
                            var n1 = [1, 0, 0], // normal
                                n2 = cartesianCross(pa, pb),
                                n2n2 = cartesianDot(n2, n2),
                                n1n2 = n2[0], // cartesianDot(n1, n2),
                                determinant = n2n2 - n1n2 * n1n2;

                            // Two polar points.
                            if (!determinant) return !two && a;

                            var c1 = cr * n2n2 / determinant,
                                c2 = -cr * n1n2 / determinant,
                                n1xn2 = cartesianCross(n1, n2),
                                A = cartesianScale(n1, c1),
                                B = cartesianScale(n2, c2);
                            cartesianAddInPlace(A, B);

                            // Solve |p(t)|^2 = 1.
                            var u = n1xn2,
                                w = cartesianDot(A, u),
                                uu = cartesianDot(u, u),
                                t2 = w * w - uu * (cartesianDot(A, A) - 1);

                            if (t2 < 0) return;

                            var t = sqrt(t2),
                                q = cartesianScale(u, (-w - t) / uu);
                            cartesianAddInPlace(q, A);
                            q = spherical(q);

                            if (!two) return q;

                            // Two intersection points.
                            var lambda0 = a[0],
                                lambda1 = b[0],
                                phi0 = a[1],
                                phi1 = b[1],
                                z;

                            if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;

                            var delta = lambda1 - lambda0,
                                polar = abs(delta - pi$3) < epsilon$2,
                                meridian = polar || delta < epsilon$2;

                            if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;

                            // Check that the first point is between a and b.
                            if (meridian ?
                                polar ?
                                phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon$2 ? phi0 : phi1) :
                                phi0 <= q[1] && q[1] <= phi1 :
                                delta > pi$3 ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
                                var q1 = cartesianScale(u, (-w + t) / uu);
                                cartesianAddInPlace(q1, A);
                                return [q, spherical(q1)];
                            }
                        }

                        // Generates a 4-bit vector representing the location of a point relative to
                        // the small circle's bounding box.
                        function code(lambda, phi) {
                            var r = smallRadius ? radius : pi$3 - radius,
                                code = 0;
                            if (lambda < -r) code |= 1; // left
                            else if (lambda > r) code |= 2; // right
                            if (phi < -r) code |= 4; // below
                            else if (phi > r) code |= 8; // above
                            return code;
                        }

                        return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$3, radius - pi$3]);
                    };

                    var transform = function(methods) {
                        return {
                            stream: transformer(methods)
                        };
                    };

                    function transformer(methods) {
                        return function(stream) {
                            var s = new TransformStream;
                            for (var key in methods) s[key] = methods[key];
                            s.stream = stream;
                            return s;
                        };
                    }

                    function TransformStream() {}

                    TransformStream.prototype = {
                        constructor: TransformStream,
                        point: function(x, y) { this.stream.point(x, y); },
                        sphere: function() { this.stream.sphere(); },
                        lineStart: function() { this.stream.lineStart(); },
                        lineEnd: function() { this.stream.lineEnd(); },
                        polygonStart: function() { this.stream.polygonStart(); },
                        polygonEnd: function() { this.stream.polygonEnd(); }
                    };

                    function fitExtent(projection, extent, object) {
                        var w = extent[1][0] - extent[0][0],
                            h = extent[1][1] - extent[0][1],
                            clip = projection.clipExtent && projection.clipExtent();

                        projection
                            .scale(150)
                            .translate([0, 0]);

                        if (clip != null) projection.clipExtent(null);

                        geoStream(object, projection.stream(boundsStream$1));

                        var b = boundsStream$1.result(),
                            k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
                            x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
                            y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;

                        if (clip != null) projection.clipExtent(clip);

                        return projection
                            .scale(k * 150)
                            .translate([x, y]);
                    }

                    function fitSize(projection, size, object) {
                        return fitExtent(projection, [
                            [0, 0], size
                        ], object);
                    }

                    var maxDepth = 16;
                    var cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance)

                    var resample = function(project, delta2) {
                        return +delta2 ? resample$1(project, delta2) : resampleNone(project);
                    };

                    function resampleNone(project) {
                        return transformer({
                            point: function(x, y) {
                                x = project(x, y);
                                this.stream.point(x[0], x[1]);
                            }
                        });
                    }

                    function resample$1(project, delta2) {

                        function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
                            var dx = x1 - x0,
                                dy = y1 - y0,
                                d2 = dx * dx + dy * dy;
                            if (d2 > 4 * delta2 && depth--) {
                                var a = a0 + a1,
                                    b = b0 + b1,
                                    c = c0 + c1,
                                    m = sqrt(a * a + b * b + c * c),
                                    phi2 = asin(c /= m),
                                    lambda2 = abs(abs(c) - 1) < epsilon$2 || abs(lambda0 - lambda1) < epsilon$2 ? (lambda0 + lambda1) / 2 : atan2(b, a),
                                    p = project(lambda2, phi2),
                                    x2 = p[0],
                                    y2 = p[1],
                                    dx2 = x2 - x0,
                                    dy2 = y2 - y0,
                                    dz = dy * dx2 - dx * dy2;
                                if (dz * dz / d2 > delta2 // perpendicular projected distance
                                    ||
                                    abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
                                    ||
                                    a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
                                    resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
                                    stream.point(x2, y2);
                                    resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
                                }
                            }
                        }
                        return function(stream) {
                            var lambda00, x00, y00, a00, b00, c00, // first point
                                lambda0, x0, y0, a0, b0, c0; // previous point

                            var resampleStream = {
                                point: point,
                                lineStart: lineStart,
                                lineEnd: lineEnd,
                                polygonStart: function() {
                                    stream.polygonStart();
                                    resampleStream.lineStart = ringStart;
                                },
                                polygonEnd: function() {
                                    stream.polygonEnd();
                                    resampleStream.lineStart = lineStart;
                                }
                            };

                            function point(x, y) {
                                x = project(x, y);
                                stream.point(x[0], x[1]);
                            }

                            function lineStart() {
                                x0 = NaN;
                                resampleStream.point = linePoint;
                                stream.lineStart();
                            }

                            function linePoint(lambda, phi) {
                                var c = cartesian([lambda, phi]),
                                    p = project(lambda, phi);
                                resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
                                stream.point(x0, y0);
                            }

                            function lineEnd() {
                                resampleStream.point = point;
                                stream.lineEnd();
                            }

                            function ringStart() {
                                lineStart();
                                resampleStream.point = ringPoint;
                                resampleStream.lineEnd = ringEnd;
                            }

                            function ringPoint(lambda, phi) {
                                linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
                                resampleStream.point = linePoint;
                            }

                            function ringEnd() {
                                resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
                                resampleStream.lineEnd = lineEnd;
                                lineEnd();
                            }

                            return resampleStream;
                        };
                    }

                    var transformRadians = transformer({
                        point: function(x, y) {
                            this.stream.point(x * radians, y * radians);
                        }
                    });

                    function projection(project) {
                        return projectionMutator(function() { return project; })();
                    }

                    function projectionMutator(projectAt) {
                        var project,
                            k = 150, // scale
                            x = 480,
                            y = 250, // translate
                            dx, dy, lambda = 0,
                            phi = 0, // center
                            deltaLambda = 0,
                            deltaPhi = 0,
                            deltaGamma = 0,
                            rotate, projectRotate, // rotate
                            theta = null,
                            preclip = clipAntimeridian, // clip angle
                            x0 = null,
                            y0, x1, y1, postclip = identity$4, // clip extent
                            delta2 = 0.5,
                            projectResample = resample(projectTransform, delta2), // precision
                            cache,
                            cacheStream;

                        function projection(point) {
                            point = projectRotate(point[0] * radians, point[1] * radians);
                            return [point[0] * k + dx, dy - point[1] * k];
                        }

                        function invert(point) {
                            point = projectRotate.invert((point[0] - dx) / k, (dy - point[1]) / k);
                            return point && [point[0] * degrees$1, point[1] * degrees$1];
                        }

                        function projectTransform(x, y) {
                            return x = project(x, y), [x[0] * k + dx, dy - x[1] * k];
                        }

                        projection.stream = function(stream) {
                            return cache && cacheStream === stream ? cache : cache = transformRadians(preclip(rotate, projectResample(postclip(cacheStream = stream))));
                        };

                        projection.clipAngle = function(_) {
                            return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians, 6 * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
                        };

                        projection.clipExtent = function(_) {
                            return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [
                                [x0, y0],
                                [x1, y1]
                            ];
                        };

                        projection.scale = function(_) {
                            return arguments.length ? (k = +_, recenter()) : k;
                        };

                        projection.translate = function(_) {
                            return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
                        };

                        projection.center = function(_) {
                            return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
                        };

                        projection.rotate = function(_) {
                            return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];
                        };

                        projection.precision = function(_) {
                            return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
                        };

                        projection.fitExtent = function(extent, object) {
                            return fitExtent(projection, extent, object);
                        };

                        projection.fitSize = function(size, object) {
                            return fitSize(projection, size, object);
                        };

                        function recenter() {
                            projectRotate = compose(rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma), project);
                            var center = project(lambda, phi);
                            dx = x - center[0] * k;
                            dy = y + center[1] * k;
                            return reset();
                        }

                        function reset() {
                            cache = cacheStream = null;
                            return projection;
                        }

                        return function() {
                            project = projectAt.apply(this, arguments);
                            projection.invert = project.invert && invert;
                            return recenter();
                        };
                    }

                    function conicProjection(projectAt) {
                        var phi0 = 0,
                            phi1 = pi$3 / 3,
                            m = projectionMutator(projectAt),
                            p = m(phi0, phi1);

                        p.parallels = function(_) {
                            return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees$1, phi1 * degrees$1];
                        };

                        return p;
                    }

                    function cylindricalEqualAreaRaw(phi0) {
                        var cosPhi0 = cos$1(phi0);

                        function forward(lambda, phi) {
                            return [lambda * cosPhi0, sin$1(phi) / cosPhi0];
                        }

                        forward.invert = function(x, y) {
                            return [x / cosPhi0, asin(y * cosPhi0)];
                        };

                        return forward;
                    }

                    function conicEqualAreaRaw(y0, y1) {
                        var sy0 = sin$1(y0),
                            n = (sy0 + sin$1(y1)) / 2;

                        // Are the parallels symmetrical around the Equator?
                        if (abs(n) < epsilon$2) return cylindricalEqualAreaRaw(y0);

                        var c = 1 + sy0 * (2 * n - sy0),
                            r0 = sqrt(c) / n;

                        function project(x, y) {
                            var r = sqrt(c - 2 * n * sin$1(y)) / n;
                            return [r * sin$1(x *= n), r0 - r * cos$1(x)];
                        }

                        project.invert = function(x, y) {
                            var r0y = r0 - y;
                            return [atan2(x, abs(r0y)) / n * sign(r0y), asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
                        };

                        return project;
                    }

                    var conicEqualArea = function() {
                        return conicProjection(conicEqualAreaRaw)
                            .scale(155.424)
                            .center([0, 33.6442]);
                    };

                    var albers = function() {
                        return conicEqualArea()
                            .parallels([29.5, 45.5])
                            .scale(1070)
                            .translate([480, 250])
                            .rotate([96, 0])
                            .center([-0.6, 38.7]);
                    };

                    // The projections must have mutually exclusive clip regions on the sphere,
                    // as this will avoid emitting interleaving lines and polygons.
                    function multiplex(streams) {
                        var n = streams.length;
                        return {
                            point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },
                            sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },
                            lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },
                            lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },
                            polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },
                            polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }
                        };
                    }

                    // A composite projection for the United States, configured by default for
                    // 960×500. The projection also works quite well at 960×600 if you change the
                    // scale to 1285 and adjust the translate accordingly. The set of standard
                    // parallels for each region comes from USGS, which is published here:
                    // http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
                    var albersUsa = function() {
                        var cache,
                            cacheStream,
                            lower48 = albers(),
                            lower48Point,
                            alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]),
                            alaskaPoint, // EPSG:3338
                            hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]),
                            hawaiiPoint, // ESRI:102007
                            point, pointStream = { point: function(x, y) { point = [x, y]; } };

                        function albersUsa(coordinates) {
                            var x = coordinates[0],
                                y = coordinates[1];
                            return point = null,
                                (lower48Point.point(x, y), point) ||
                                (alaskaPoint.point(x, y), point) ||
                                (hawaiiPoint.point(x, y), point);
                        }

                        albersUsa.invert = function(coordinates) {
                            var k = lower48.scale(),
                                t = lower48.translate(),
                                x = (coordinates[0] - t[0]) / k,
                                y = (coordinates[1] - t[1]) / k;
                            return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska :
                                y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii :
                                lower48).invert(coordinates);
                        };

                        albersUsa.stream = function(stream) {
                            return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);
                        };

                        albersUsa.precision = function(_) {
                            if (!arguments.length) return lower48.precision();
                            lower48.precision(_), alaska.precision(_), hawaii.precision(_);
                            return reset();
                        };

                        albersUsa.scale = function(_) {
                            if (!arguments.length) return lower48.scale();
                            lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);
                            return albersUsa.translate(lower48.translate());
                        };

                        albersUsa.translate = function(_) {
                            if (!arguments.length) return lower48.translate();
                            var k = lower48.scale(),
                                x = +_[0],
                                y = +_[1];

                            lower48Point = lower48
                                .translate(_)
                                .clipExtent([
                                    [x - 0.455 * k, y - 0.238 * k],
                                    [x + 0.455 * k, y + 0.238 * k]
                                ])
                                .stream(pointStream);

                            alaskaPoint = alaska
                                .translate([x - 0.307 * k, y + 0.201 * k])
                                .clipExtent([
                                    [x - 0.425 * k + epsilon$2, y + 0.120 * k + epsilon$2],
                                    [x - 0.214 * k - epsilon$2, y + 0.234 * k - epsilon$2]
                                ])
                                .stream(pointStream);

                            hawaiiPoint = hawaii
                                .translate([x - 0.205 * k, y + 0.212 * k])
                                .clipExtent([
                                    [x - 0.214 * k + epsilon$2, y + 0.166 * k + epsilon$2],
                                    [x - 0.115 * k - epsilon$2, y + 0.234 * k - epsilon$2]
                                ])
                                .stream(pointStream);

                            return reset();
                        };

                        albersUsa.fitExtent = function(extent, object) {
                            return fitExtent(albersUsa, extent, object);
                        };

                        albersUsa.fitSize = function(size, object) {
                            return fitSize(albersUsa, size, object);
                        };

                        function reset() {
                            cache = cacheStream = null;
                            return albersUsa;
                        }

                        return albersUsa.scale(1070);
                    };

                    function azimuthalRaw(scale) {
                        return function(x, y) {
                            var cx = cos$1(x),
                                cy = cos$1(y),
                                k = scale(cx * cy);
                            return [
                                k * cy * sin$1(x),
                                k * sin$1(y)
                            ];
                        }
                    }

                    function azimuthalInvert(angle) {
                        return function(x, y) {
                            var z = sqrt(x * x + y * y),
                                c = angle(z),
                                sc = sin$1(c),
                                cc = cos$1(c);
                            return [
                                atan2(x * sc, z * cc),
                                asin(z && y * sc / z)
                            ];
                        }
                    }

                    var azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) {
                        return sqrt(2 / (1 + cxcy));
                    });

                    azimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) {
                        return 2 * asin(z / 2);
                    });

                    var azimuthalEqualArea = function() {
                        return projection(azimuthalEqualAreaRaw)
                            .scale(124.75)
                            .clipAngle(180 - 1e-3);
                    };

                    var azimuthalEquidistantRaw = azimuthalRaw(function(c) {
                        return (c = acos(c)) && c / sin$1(c);
                    });

                    azimuthalEquidistantRaw.invert = azimuthalInvert(function(z) {
                        return z;
                    });

                    var azimuthalEquidistant = function() {
                        return projection(azimuthalEquidistantRaw)
                            .scale(79.4188)
                            .clipAngle(180 - 1e-3);
                    };

                    function mercatorRaw(lambda, phi) {
                        return [lambda, log(tan((halfPi$2 + phi) / 2))];
                    }

                    mercatorRaw.invert = function(x, y) {
                        return [x, 2 * atan(exp(y)) - halfPi$2];
                    };

                    var mercator = function() {
                        return mercatorProjection(mercatorRaw)
                            .scale(961 / tau$3);
                    };

                    function mercatorProjection(project) {
                        var m = projection(project),
                            scale = m.scale,
                            translate = m.translate,
                            clipExtent = m.clipExtent,
                            clipAuto;

                        m.scale = function(_) {
                            return arguments.length ? (scale(_), clipAuto && m.clipExtent(null), m) : scale();
                        };

                        m.translate = function(_) {
                            return arguments.length ? (translate(_), clipAuto && m.clipExtent(null), m) : translate();
                        };

                        m.clipExtent = function(_) {
                            if (!arguments.length) return clipAuto ? null : clipExtent();
                            if (clipAuto = _ == null) {
                                var k = pi$3 * scale(),
                                    t = translate();
                                _ = [
                                    [t[0] - k, t[1] - k],
                                    [t[0] + k, t[1] + k]
                                ];
                            }
                            clipExtent(_);
                            return m;
                        };

                        return m.clipExtent(null);
                    }

                    function tany(y) {
                        return tan((halfPi$2 + y) / 2);
                    }

                    function conicConformalRaw(y0, y1) {
                        var cy0 = cos$1(y0),
                            n = y0 === y1 ? sin$1(y0) : log(cy0 / cos$1(y1)) / log(tany(y1) / tany(y0)),
                            f = cy0 * pow(tany(y0), n) / n;

                        if (!n) return mercatorRaw;

                        function project(x, y) {
                            if (f > 0) { if (y < -halfPi$2 + epsilon$2) y = -halfPi$2 + epsilon$2; } else { if (y > halfPi$2 - epsilon$2) y = halfPi$2 - epsilon$2; }
                            var r = f / pow(tany(y), n);
                            return [r * sin$1(n * x), f - r * cos$1(n * x)];
                        }

                        project.invert = function(x, y) {
                            var fy = f - y,
                                r = sign(n) * sqrt(x * x + fy * fy);
                            return [atan2(x, abs(fy)) / n * sign(fy), 2 * atan(pow(f / r, 1 / n)) - halfPi$2];
                        };

                        return project;
                    }

                    var conicConformal = function() {
                        return conicProjection(conicConformalRaw)
                            .scale(109.5)
                            .parallels([30, 30]);
                    };

                    function equirectangularRaw(lambda, phi) {
                        return [lambda, phi];
                    }

                    equirectangularRaw.invert = equirectangularRaw;

                    var equirectangular = function() {
                        return projection(equirectangularRaw)
                            .scale(152.63);
                    };

                    function conicEquidistantRaw(y0, y1) {
                        var cy0 = cos$1(y0),
                            n = y0 === y1 ? sin$1(y0) : (cy0 - cos$1(y1)) / (y1 - y0),
                            g = cy0 / n + y0;

                        if (abs(n) < epsilon$2) return equirectangularRaw;

                        function project(x, y) {
                            var gy = g - y,
                                nx = n * x;
                            return [gy * sin$1(nx), g - gy * cos$1(nx)];
                        }

                        project.invert = function(x, y) {
                            var gy = g - y;
                            return [atan2(x, abs(gy)) / n * sign(gy), g - sign(n) * sqrt(x * x + gy * gy)];
                        };

                        return project;
                    }

                    var conicEquidistant = function() {
                        return conicProjection(conicEquidistantRaw)
                            .scale(131.154)
                            .center([0, 13.9389]);
                    };

                    function gnomonicRaw(x, y) {
                        var cy = cos$1(y),
                            k = cos$1(x) * cy;
                        return [cy * sin$1(x) / k, sin$1(y) / k];
                    }

                    gnomonicRaw.invert = azimuthalInvert(atan);

                    var gnomonic = function() {
                        return projection(gnomonicRaw)
                            .scale(144.049)
                            .clipAngle(60);
                    };

                    function scaleTranslate(kx, ky, tx, ty) {
                        return kx === 1 && ky === 1 && tx === 0 && ty === 0 ? identity$4 : transformer({
                            point: function(x, y) {
                                this.stream.point(x * kx + tx, y * ky + ty);
                            }
                        });
                    }

                    var identity$5 = function() {
                        var k = 1,
                            tx = 0,
                            ty = 0,
                            sx = 1,
                            sy = 1,
                            transform = identity$4, // scale, translate and reflect
                            x0 = null,
                            y0, x1, y1, clip = identity$4, // clip extent
                            cache,
                            cacheStream,
                            projection;

                        function reset() {
                            cache = cacheStream = null;
                            return projection;
                        }

                        return projection = {
                            stream: function(stream) {
                                return cache && cacheStream === stream ? cache : cache = transform(clip(cacheStream = stream));
                            },
                            clipExtent: function(_) {
                                return arguments.length ? (clip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [
                                    [x0, y0],
                                    [x1, y1]
                                ];
                            },
                            scale: function(_) {
                                return arguments.length ? (transform = scaleTranslate((k = +_) * sx, k * sy, tx, ty), reset()) : k;
                            },
                            translate: function(_) {
                                return arguments.length ? (transform = scaleTranslate(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty];
                            },
                            reflectX: function(_) {
                                return arguments.length ? (transform = scaleTranslate(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0;
                            },
                            reflectY: function(_) {
                                return arguments.length ? (transform = scaleTranslate(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0;
                            },
                            fitExtent: function(extent, object) {
                                return fitExtent(projection, extent, object);
                            },
                            fitSize: function(size, object) {
                                return fitSize(projection, size, object);
                            }
                        };
                    };

                    function orthographicRaw(x, y) {
                        return [cos$1(y) * sin$1(x), sin$1(y)];
                    }

                    orthographicRaw.invert = azimuthalInvert(asin);

                    var orthographic = function() {
                        return projection(orthographicRaw)
                            .scale(249.5)
                            .clipAngle(90 + epsilon$2);
                    };

                    function stereographicRaw(x, y) {
                        var cy = cos$1(y),
                            k = 1 + cos$1(x) * cy;
                        return [cy * sin$1(x) / k, sin$1(y) / k];
                    }

                    stereographicRaw.invert = azimuthalInvert(function(z) {
                        return 2 * atan(z);
                    });

                    var stereographic = function() {
                        return projection(stereographicRaw)
                            .scale(250)
                            .clipAngle(142);
                    };

                    function transverseMercatorRaw(lambda, phi) {
                        return [log(tan((halfPi$2 + phi) / 2)), -lambda];
                    }

                    transverseMercatorRaw.invert = function(x, y) {
                        return [-y, 2 * atan(exp(x)) - halfPi$2];
                    };

                    var transverseMercator = function() {
                        var m = mercatorProjection(transverseMercatorRaw),
                            center = m.center,
                            rotate = m.rotate;

                        m.center = function(_) {
                            return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);
                        };

                        m.rotate = function(_) {
                            return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);
                        };

                        return rotate([0, 0, 90])
                            .scale(159.155);
                    };

                    function defaultSeparation(a, b) {
                        return a.parent === b.parent ? 1 : 2;
                    }

                    function meanX(children) {
                        return children.reduce(meanXReduce, 0) / children.length;
                    }

                    function meanXReduce(x, c) {
                        return x + c.x;
                    }

                    function maxY(children) {
                        return 1 + children.reduce(maxYReduce, 0);
                    }

                    function maxYReduce(y, c) {
                        return Math.max(y, c.y);
                    }

                    function leafLeft(node) {
                        var children;
                        while (children = node.children) node = children[0];
                        return node;
                    }

                    function leafRight(node) {
                        var children;
                        while (children = node.children) node = children[children.length - 1];
                        return node;
                    }

                    var cluster = function() {
                        var separation = defaultSeparation,
                            dx = 1,
                            dy = 1,
                            nodeSize = false;

                        function cluster(root) {
                            var previousNode,
                                x = 0;

                            // First walk, computing the initial x & y values.
                            root.eachAfter(function(node) {
                                var children = node.children;
                                if (children) {
                                    node.x = meanX(children);
                                    node.y = maxY(children);
                                } else {
                                    node.x = previousNode ? x += separation(node, previousNode) : 0;
                                    node.y = 0;
                                    previousNode = node;
                                }
                            });

                            var left = leafLeft(root),
                                right = leafRight(root),
                                x0 = left.x - separation(left, right) / 2,
                                x1 = right.x + separation(right, left) / 2;

                            // Second walk, normalizing x & y to the desired size.
                            return root.eachAfter(nodeSize ? function(node) {
                                node.x = (node.x - root.x) * dx;
                                node.y = (root.y - node.y) * dy;
                            } : function(node) {
                                node.x = (node.x - x0) / (x1 - x0) * dx;
                                node.y = (1 - (root.y ? node.y / root.y : 1)) * dy;
                            });
                        }

                        cluster.separation = function(x) {
                            return arguments.length ? (separation = x, cluster) : separation;
                        };

                        cluster.size = function(x) {
                            return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? null : [dx, dy]);
                        };

                        cluster.nodeSize = function(x) {
                            return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? [dx, dy] : null);
                        };

                        return cluster;
                    };

                    function count(node) {
                        var sum = 0,
                            children = node.children,
                            i = children && children.length;
                        if (!i) sum = 1;
                        else
                            while (--i >= 0) sum += children[i].value;
                        node.value = sum;
                    }

                    var node_count = function() {
                        return this.eachAfter(count);
                    };

                    var node_each = function(callback) {
                        var node = this,
                            current, next = [node],
                            children, i, n;
                        do {
                            current = next.reverse(), next = [];
                            while (node = current.pop()) {
                                callback(node), children = node.children;
                                if (children)
                                    for (i = 0, n = children.length; i < n; ++i) {
                                        next.push(children[i]);
                                    }
                            }
                        } while (next.length);
                        return this;
                    };

                    var node_eachBefore = function(callback) {
                        var node = this,
                            nodes = [node],
                            children, i;
                        while (node = nodes.pop()) {
                            callback(node), children = node.children;
                            if (children)
                                for (i = children.length - 1; i >= 0; --i) {
                                    nodes.push(children[i]);
                                }
                        }
                        return this;
                    };

                    var node_eachAfter = function(callback) {
                        var node = this,
                            nodes = [node],
                            next = [],
                            children, i, n;
                        while (node = nodes.pop()) {
                            next.push(node), children = node.children;
                            if (children)
                                for (i = 0, n = children.length; i < n; ++i) {
                                    nodes.push(children[i]);
                                }
                        }
                        while (node = next.pop()) {
                            callback(node);
                        }
                        return this;
                    };

                    var node_sum = function(value) {
                        return this.eachAfter(function(node) {
                            var sum = +value(node.data) || 0,
                                children = node.children,
                                i = children && children.length;
                            while (--i >= 0) sum += children[i].value;
                            node.value = sum;
                        });
                    };

                    var node_sort = function(compare) {
                        return this.eachBefore(function(node) {
                            if (node.children) {
                                node.children.sort(compare);
                            }
                        });
                    };

                    var node_path = function(end) {
                        var start = this,
                            ancestor = leastCommonAncestor(start, end),
                            nodes = [start];
                        while (start !== ancestor) {
                            start = start.parent;
                            nodes.push(start);
                        }
                        var k = nodes.length;
                        while (end !== ancestor) {
                            nodes.splice(k, 0, end);
                            end = end.parent;
                        }
                        return nodes;
                    };

                    function leastCommonAncestor(a, b) {
                        if (a === b) return a;
                        var aNodes = a.ancestors(),
                            bNodes = b.ancestors(),
                            c = null;
                        a = aNodes.pop();
                        b = bNodes.pop();
                        while (a === b) {
                            c = a;
                            a = aNodes.pop();
                            b = bNodes.pop();
                        }
                        return c;
                    }

                    var node_ancestors = function() {
                        var node = this,
                            nodes = [node];
                        while (node = node.parent) {
                            nodes.push(node);
                        }
                        return nodes;
                    };

                    var node_descendants = function() {
                        var nodes = [];
                        this.each(function(node) {
                            nodes.push(node);
                        });
                        return nodes;
                    };

                    var node_leaves = function() {
                        var leaves = [];
                        this.eachBefore(function(node) {
                            if (!node.children) {
                                leaves.push(node);
                            }
                        });
                        return leaves;
                    };

                    var node_links = function() {
                        var root = this,
                            links = [];
                        root.each(function(node) {
                            if (node !== root) { // Don’t include the root’s parent, if any.
                                links.push({ source: node.parent, target: node });
                            }
                        });
                        return links;
                    };

                    function hierarchy(data, children) {
                        var root = new Node(data),
                            valued = +data.value && (root.value = data.value),
                            node,
                            nodes = [root],
                            child,
                            childs,
                            i,
                            n;

                        if (children == null) children = defaultChildren;

                        while (node = nodes.pop()) {
                            if (valued) node.value = +node.data.value;
                            if ((childs = children(node.data)) && (n = childs.length)) {
                                node.children = new Array(n);
                                for (i = n - 1; i >= 0; --i) {
                                    nodes.push(child = node.children[i] = new Node(childs[i]));
                                    child.parent = node;
                                    child.depth = node.depth + 1;
                                }
                            }
                        }

                        return root.eachBefore(computeHeight);
                    }

                    function node_copy() {
                        return hierarchy(this).eachBefore(copyData);
                    }

                    function defaultChildren(d) {
                        return d.children;
                    }

                    function copyData(node) {
                        node.data = node.data.data;
                    }

                    function computeHeight(node) {
                        var height = 0;
                        do node.height = height;
                        while ((node = node.parent) && (node.height < ++height));
                    }

                    function Node(data) {
                        this.data = data;
                        this.depth =
                            this.height = 0;
                        this.parent = null;
                    }

                    Node.prototype = hierarchy.prototype = {
                        constructor: Node,
                        count: node_count,
                        each: node_each,
                        eachAfter: node_eachAfter,
                        eachBefore: node_eachBefore,
                        sum: node_sum,
                        sort: node_sort,
                        path: node_path,
                        ancestors: node_ancestors,
                        descendants: node_descendants,
                        leaves: node_leaves,
                        links: node_links,
                        copy: node_copy
                    };

                    function Node$2(value) {
                        this._ = value;
                        this.next = null;
                    }

                    var shuffle$1 = function(array) {
                        var i,
                            n = (array = array.slice()).length,
                            head = null,
                            node = head;

                        while (n) {
                            var next = new Node$2(array[n - 1]);
                            if (node) node = node.next = next;
                            else node = head = next;
                            array[i] = array[--n];
                        }

                        return {
                            head: head,
                            tail: node
                        };
                    };

                    var enclose = function(circles) {
                        return encloseN(shuffle$1(circles), []);
                    };

                    function encloses(a, b) {
                        var dx = b.x - a.x,
                            dy = b.y - a.y,
                            dr = a.r - b.r;
                        return dr * dr + 1e-6 > dx * dx + dy * dy;
                    }

                    // Returns the smallest circle that contains circles L and intersects circles B.
                    function encloseN(L, B) {
                        var circle,
                            l0 = null,
                            l1 = L.head,
                            l2,
                            p1;

                        switch (B.length) {
                            case 1:
                                circle = enclose1(B[0]);
                                break;
                            case 2:
                                circle = enclose2(B[0], B[1]);
                                break;
                            case 3:
                                circle = enclose3(B[0], B[1], B[2]);
                                break;
                        }

                        while (l1) {
                            p1 = l1._, l2 = l1.next;
                            if (!circle || !encloses(circle, p1)) {

                                // Temporarily truncate L before l1.
                                if (l0) L.tail = l0, l0.next = null;
                                else L.head = L.tail = null;

                                B.push(p1);
                                circle = encloseN(L, B); // Note: reorders L!
                                B.pop();

                                // Move l1 to the front of L and reconnect the truncated list L.
                                if (L.head) l1.next = L.head, L.head = l1;
                                else l1.next = null, L.head = L.tail = l1;
                                l0 = L.tail, l0.next = l2;

                            } else {
                                l0 = l1;
                            }
                            l1 = l2;
                        }

                        L.tail = l0;
                        return circle;
                    }

                    function enclose1(a) {
                        return {
                            x: a.x,
                            y: a.y,
                            r: a.r
                        };
                    }

                    function enclose2(a, b) {
                        var x1 = a.x,
                            y1 = a.y,
                            r1 = a.r,
                            x2 = b.x,
                            y2 = b.y,
                            r2 = b.r,
                            x21 = x2 - x1,
                            y21 = y2 - y1,
                            r21 = r2 - r1,
                            l = Math.sqrt(x21 * x21 + y21 * y21);
                        return {
                            x: (x1 + x2 + x21 / l * r21) / 2,
                            y: (y1 + y2 + y21 / l * r21) / 2,
                            r: (l + r1 + r2) / 2
                        };
                    }

                    function enclose3(a, b, c) {
                        var x1 = a.x,
                            y1 = a.y,
                            r1 = a.r,
                            x2 = b.x,
                            y2 = b.y,
                            r2 = b.r,
                            x3 = c.x,
                            y3 = c.y,
                            r3 = c.r,
                            a2 = 2 * (x1 - x2),
                            b2 = 2 * (y1 - y2),
                            c2 = 2 * (r2 - r1),
                            d2 = x1 * x1 + y1 * y1 - r1 * r1 - x2 * x2 - y2 * y2 + r2 * r2,
                            a3 = 2 * (x1 - x3),
                            b3 = 2 * (y1 - y3),
                            c3 = 2 * (r3 - r1),
                            d3 = x1 * x1 + y1 * y1 - r1 * r1 - x3 * x3 - y3 * y3 + r3 * r3,
                            ab = a3 * b2 - a2 * b3,
                            xa = (b2 * d3 - b3 * d2) / ab - x1,
                            xb = (b3 * c2 - b2 * c3) / ab,
                            ya = (a3 * d2 - a2 * d3) / ab - y1,
                            yb = (a2 * c3 - a3 * c2) / ab,
                            A = xb * xb + yb * yb - 1,
                            B = 2 * (xa * xb + ya * yb + r1),
                            C = xa * xa + ya * ya - r1 * r1,
                            r = (-B - Math.sqrt(B * B - 4 * A * C)) / (2 * A);
                        return {
                            x: xa + xb * r + x1,
                            y: ya + yb * r + y1,
                            r: r
                        };
                    }

                    function place(a, b, c) {
                        var ax = a.x,
                            ay = a.y,
                            da = b.r + c.r,
                            db = a.r + c.r,
                            dx = b.x - ax,
                            dy = b.y - ay,
                            dc = dx * dx + dy * dy;
                        if (dc) {
                            var x = 0.5 + ((db *= db) - (da *= da)) / (2 * dc),
                                y = Math.sqrt(Math.max(0, 2 * da * (db + dc) - (db -= dc) * db - da * da)) / (2 * dc);
                            c.x = ax + x * dx + y * dy;
                            c.y = ay + x * dy - y * dx;
                        } else {
                            c.x = ax + db;
                            c.y = ay;
                        }
                    }

                    function intersects(a, b) {
                        var dx = b.x - a.x,
                            dy = b.y - a.y,
                            dr = a.r + b.r;
                        return dr * dr - 1e-6 > dx * dx + dy * dy;
                    }

                    function distance1(a, b) {
                        var l = a._.r;
                        while (a !== b) l += 2 * (a = a.next)._.r;
                        return l - b._.r;
                    }

                    function distance2(circle, x, y) {
                        var dx = circle.x - x,
                            dy = circle.y - y;
                        return dx * dx + dy * dy;
                    }

                    function Node$1(circle) {
                        this._ = circle;
                        this.next = null;
                        this.previous = null;
                    }

                    function packEnclose(circles) {
                        if (!(n = circles.length)) return 0;

                        var a, b, c, n;

                        // Place the first circle.
                        a = circles[0], a.x = 0, a.y = 0;
                        if (!(n > 1)) return a.r;

                        // Place the second circle.
                        b = circles[1], a.x = -b.r, b.x = a.r, b.y = 0;
                        if (!(n > 2)) return a.r + b.r;

                        // Place the third circle.
                        place(b, a, c = circles[2]);

                        // Initialize the weighted centroid.
                        var aa = a.r * a.r,
                            ba = b.r * b.r,
                            ca = c.r * c.r,
                            oa = aa + ba + ca,
                            ox = aa * a.x + ba * b.x + ca * c.x,
                            oy = aa * a.y + ba * b.y + ca * c.y,
                            cx, cy, i, j, k, sj, sk;

                        // Initialize the front-chain using the first three circles a, b and c.
                        a = new Node$1(a), b = new Node$1(b), c = new Node$1(c);
                        a.next = c.previous = b;
                        b.next = a.previous = c;
                        c.next = b.previous = a;

                        // Attempt to place each remaining circle…
                        pack: for (i = 3; i < n; ++i) {
                            place(a._, b._, c = circles[i]), c = new Node$1(c);

                            // Find the closest intersecting circle on the front-chain, if any.
                            // “Closeness” is determined by linear distance along the front-chain.
                            // “Ahead” or “behind” is likewise determined by linear distance.
                            j = b.next, k = a.previous, sj = b._.r, sk = a._.r;
                            do {
                                if (sj <= sk) {
                                    if (intersects(j._, c._)) {
                                        if (sj + a._.r + b._.r > distance1(j, b)) a = j;
                                        else b = j;
                                        a.next = b, b.previous = a, --i;
                                        continue pack;
                                    }
                                    sj += j._.r, j = j.next;
                                } else {
                                    if (intersects(k._, c._)) {
                                        if (distance1(a, k) > sk + a._.r + b._.r) a = k;
                                        else b = k;
                                        a.next = b, b.previous = a, --i;
                                        continue pack;
                                    }
                                    sk += k._.r, k = k.previous;
                                }
                            } while (j !== k.next);

                            // Success! Insert the new circle c between a and b.
                            c.previous = a, c.next = b, a.next = b.previous = b = c;

                            // Update the weighted centroid.
                            oa += ca = c._.r * c._.r;
                            ox += ca * c._.x;
                            oy += ca * c._.y;

                            // Compute the new closest circle a to centroid.
                            aa = distance2(a._, cx = ox / oa, cy = oy / oa);
                            while ((c = c.next) !== b) {
                                if ((ca = distance2(c._, cx, cy)) < aa) {
                                    a = c, aa = ca;
                                }
                            }
                            b = a.next;
                        }

                        // Compute the enclosing circle of the front chain.
                        a = [b._], c = b;
                        while ((c = c.next) !== b) a.push(c._);
                        c = enclose(a);

                        // Translate the circles to put the enclosing circle around the origin.
                        for (i = 0; i < n; ++i) a = circles[i], a.x -= c.x, a.y -= c.y;

                        return c.r;
                    }

                    var siblings = function(circles) {
                        packEnclose(circles);
                        return circles;
                    };

                    function optional(f) {
                        return f == null ? null : required(f);
                    }

                    function required(f) {
                        if (typeof f !== "function") throw new Error;
                        return f;
                    }

                    function constantZero() {
                        return 0;
                    }

                    var constant$8 = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    function defaultRadius$1(d) {
                        return Math.sqrt(d.value);
                    }

                    var index$2 = function() {
                        var radius = null,
                            dx = 1,
                            dy = 1,
                            padding = constantZero;

                        function pack(root) {
                            root.x = dx / 2, root.y = dy / 2;
                            if (radius) {
                                root.eachBefore(radiusLeaf(radius))
                                    .eachAfter(packChildren(padding, 0.5))
                                    .eachBefore(translateChild(1));
                            } else {
                                root.eachBefore(radiusLeaf(defaultRadius$1))
                                    .eachAfter(packChildren(constantZero, 1))
                                    .eachAfter(packChildren(padding, root.r / Math.min(dx, dy)))
                                    .eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r)));
                            }
                            return root;
                        }

                        pack.radius = function(x) {
                            return arguments.length ? (radius = optional(x), pack) : radius;
                        };

                        pack.size = function(x) {
                            return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];
                        };

                        pack.padding = function(x) {
                            return arguments.length ? (padding = typeof x === "function" ? x : constant$8(+x), pack) : padding;
                        };

                        return pack;
                    };

                    function radiusLeaf(radius) {
                        return function(node) {
                            if (!node.children) {
                                node.r = Math.max(0, +radius(node) || 0);
                            }
                        };
                    }

                    function packChildren(padding, k) {
                        return function(node) {
                            if (children = node.children) {
                                var children,
                                    i,
                                    n = children.length,
                                    r = padding(node) * k || 0,
                                    e;

                                if (r)
                                    for (i = 0; i < n; ++i) children[i].r += r;
                                e = packEnclose(children);
                                if (r)
                                    for (i = 0; i < n; ++i) children[i].r -= r;
                                node.r = e + r;
                            }
                        };
                    }

                    function translateChild(k) {
                        return function(node) {
                            var parent = node.parent;
                            node.r *= k;
                            if (parent) {
                                node.x = parent.x + k * node.x;
                                node.y = parent.y + k * node.y;
                            }
                        };
                    }

                    var roundNode = function(node) {
                        node.x0 = Math.round(node.x0);
                        node.y0 = Math.round(node.y0);
                        node.x1 = Math.round(node.x1);
                        node.y1 = Math.round(node.y1);
                    };

                    var treemapDice = function(parent, x0, y0, x1, y1) {
                        var nodes = parent.children,
                            node,
                            i = -1,
                            n = nodes.length,
                            k = parent.value && (x1 - x0) / parent.value;

                        while (++i < n) {
                            node = nodes[i], node.y0 = y0, node.y1 = y1;
                            node.x0 = x0, node.x1 = x0 += node.value * k;
                        }
                    };

                    var partition = function() {
                        var dx = 1,
                            dy = 1,
                            padding = 0,
                            round = false;

                        function partition(root) {
                            var n = root.height + 1;
                            root.x0 =
                                root.y0 = padding;
                            root.x1 = dx;
                            root.y1 = dy / n;
                            root.eachBefore(positionNode(dy, n));
                            if (round) root.eachBefore(roundNode);
                            return root;
                        }

                        function positionNode(dy, n) {
                            return function(node) {
                                if (node.children) {
                                    treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);
                                }
                                var x0 = node.x0,
                                    y0 = node.y0,
                                    x1 = node.x1 - padding,
                                    y1 = node.y1 - padding;
                                if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
                                if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
                                node.x0 = x0;
                                node.y0 = y0;
                                node.x1 = x1;
                                node.y1 = y1;
                            };
                        }

                        partition.round = function(x) {
                            return arguments.length ? (round = !!x, partition) : round;
                        };

                        partition.size = function(x) {
                            return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];
                        };

                        partition.padding = function(x) {
                            return arguments.length ? (padding = +x, partition) : padding;
                        };

                        return partition;
                    };

                    var keyPrefix$1 = "$";
                    var preroot = { depth: -1 };
                    var ambiguous = {};

                    function defaultId(d) {
                        return d.id;
                    }

                    function defaultParentId(d) {
                        return d.parentId;
                    }

                    var stratify = function() {
                        var id = defaultId,
                            parentId = defaultParentId;

                        function stratify(data) {
                            var d,
                                i,
                                n = data.length,
                                root,
                                parent,
                                node,
                                nodes = new Array(n),
                                nodeId,
                                nodeKey,
                                nodeByKey = {};

                            for (i = 0; i < n; ++i) {
                                d = data[i], node = nodes[i] = new Node(d);
                                if ((nodeId = id(d, i, data)) != null && (nodeId += "")) {
                                    nodeKey = keyPrefix$1 + (node.id = nodeId);
                                    nodeByKey[nodeKey] = nodeKey in nodeByKey ? ambiguous : node;
                                }
                            }

                            for (i = 0; i < n; ++i) {
                                node = nodes[i], nodeId = parentId(data[i], i, data);
                                if (nodeId == null || !(nodeId += "")) {
                                    if (root) throw new Error("multiple roots");
                                    root = node;
                                } else {
                                    parent = nodeByKey[keyPrefix$1 + nodeId];
                                    if (!parent) throw new Error("missing: " + nodeId);
                                    if (parent === ambiguous) throw new Error("ambiguous: " + nodeId);
                                    if (parent.children) parent.children.push(node);
                                    else parent.children = [node];
                                    node.parent = parent;
                                }
                            }

                            if (!root) throw new Error("no root");
                            root.parent = preroot;
                            root.eachBefore(function(node) { node.depth = node.parent.depth + 1;--n; }).eachBefore(computeHeight);
                            root.parent = null;
                            if (n > 0) throw new Error("cycle");

                            return root;
                        }

                        stratify.id = function(x) {
                            return arguments.length ? (id = required(x), stratify) : id;
                        };

                        stratify.parentId = function(x) {
                            return arguments.length ? (parentId = required(x), stratify) : parentId;
                        };

                        return stratify;
                    };

                    function defaultSeparation$1(a, b) {
                        return a.parent === b.parent ? 1 : 2;
                    }

                    // function radialSeparation(a, b) {
                    //   return (a.parent === b.parent ? 1 : 2) / a.depth;
                    // }

                    // This function is used to traverse the left contour of a subtree (or
                    // subforest). It returns the successor of v on this contour. This successor is
                    // either given by the leftmost child of v or by the thread of v. The function
                    // returns null if and only if v is on the highest level of its subtree.
                    function nextLeft(v) {
                        var children = v.children;
                        return children ? children[0] : v.t;
                    }

                    // This function works analogously to nextLeft.
                    function nextRight(v) {
                        var children = v.children;
                        return children ? children[children.length - 1] : v.t;
                    }

                    // Shifts the current subtree rooted at w+. This is done by increasing
                    // prelim(w+) and mod(w+) by shift.
                    function moveSubtree(wm, wp, shift) {
                        var change = shift / (wp.i - wm.i);
                        wp.c -= change;
                        wp.s += shift;
                        wm.c += change;
                        wp.z += shift;
                        wp.m += shift;
                    }

                    // All other shifts, applied to the smaller subtrees between w- and w+, are
                    // performed by this function. To prepare the shifts, we have to adjust
                    // change(w+), shift(w+), and change(w-).
                    function executeShifts(v) {
                        var shift = 0,
                            change = 0,
                            children = v.children,
                            i = children.length,
                            w;
                        while (--i >= 0) {
                            w = children[i];
                            w.z += shift;
                            w.m += shift;
                            shift += w.s + (change += w.c);
                        }
                    }

                    // If vi-’s ancestor is a sibling of v, returns vi-’s ancestor. Otherwise,
                    // returns the specified (default) ancestor.
                    function nextAncestor(vim, v, ancestor) {
                        return vim.a.parent === v.parent ? vim.a : ancestor;
                    }

                    function TreeNode(node, i) {
                        this._ = node;
                        this.parent = null;
                        this.children = null;
                        this.A = null; // default ancestor
                        this.a = this; // ancestor
                        this.z = 0; // prelim
                        this.m = 0; // mod
                        this.c = 0; // change
                        this.s = 0; // shift
                        this.t = null; // thread
                        this.i = i; // number
                    }

                    TreeNode.prototype = Object.create(Node.prototype);

                    function treeRoot(root) {
                        var tree = new TreeNode(root, 0),
                            node,
                            nodes = [tree],
                            child,
                            children,
                            i,
                            n;

                        while (node = nodes.pop()) {
                            if (children = node._.children) {
                                node.children = new Array(n = children.length);
                                for (i = n - 1; i >= 0; --i) {
                                    nodes.push(child = node.children[i] = new TreeNode(children[i], i));
                                    child.parent = node;
                                }
                            }
                        }

                        (tree.parent = new TreeNode(null, 0)).children = [tree];
                        return tree;
                    }

                    // Node-link tree diagram using the Reingold-Tilford "tidy" algorithm
                    var tree = function() {
                        var separation = defaultSeparation$1,
                            dx = 1,
                            dy = 1,
                            nodeSize = null;

                        function tree(root) {
                            var t = treeRoot(root);

                            // Compute the layout using Buchheim et al.’s algorithm.
                            t.eachAfter(firstWalk), t.parent.m = -t.z;
                            t.eachBefore(secondWalk);

                            // If a fixed node size is specified, scale x and y.
                            if (nodeSize) root.eachBefore(sizeNode);

                            // If a fixed tree size is specified, scale x and y based on the extent.
                            // Compute the left-most, right-most, and depth-most nodes for extents.
                            else {
                                var left = root,
                                    right = root,
                                    bottom = root;
                                root.eachBefore(function(node) {
                                    if (node.x < left.x) left = node;
                                    if (node.x > right.x) right = node;
                                    if (node.depth > bottom.depth) bottom = node;
                                });
                                var s = left === right ? 1 : separation(left, right) / 2,
                                    tx = s - left.x,
                                    kx = dx / (right.x + s + tx),
                                    ky = dy / (bottom.depth || 1);
                                root.eachBefore(function(node) {
                                    node.x = (node.x + tx) * kx;
                                    node.y = node.depth * ky;
                                });
                            }

                            return root;
                        }

                        // Computes a preliminary x-coordinate for v. Before that, FIRST WALK is
                        // applied recursively to the children of v, as well as the function
                        // APPORTION. After spacing out the children by calling EXECUTE SHIFTS, the
                        // node v is placed to the midpoint of its outermost children.
                        function firstWalk(v) {
                            var children = v.children,
                                siblings = v.parent.children,
                                w = v.i ? siblings[v.i - 1] : null;
                            if (children) {
                                executeShifts(v);
                                var midpoint = (children[0].z + children[children.length - 1].z) / 2;
                                if (w) {
                                    v.z = w.z + separation(v._, w._);
                                    v.m = v.z - midpoint;
                                } else {
                                    v.z = midpoint;
                                }
                            } else if (w) {
                                v.z = w.z + separation(v._, w._);
                            }
                            v.parent.A = apportion(v, w, v.parent.A || siblings[0]);
                        }

                        // Computes all real x-coordinates by summing up the modifiers recursively.
                        function secondWalk(v) {
                            v._.x = v.z + v.parent.m;
                            v.m += v.parent.m;
                        }

                        // The core of the algorithm. Here, a new subtree is combined with the
                        // previous subtrees. Threads are used to traverse the inside and outside
                        // contours of the left and right subtree up to the highest common level. The
                        // vertices used for the traversals are vi+, vi-, vo-, and vo+, where the
                        // superscript o means outside and i means inside, the subscript - means left
                        // subtree and + means right subtree. For summing up the modifiers along the
                        // contour, we use respective variables si+, si-, so-, and so+. Whenever two
                        // nodes of the inside contours conflict, we compute the left one of the
                        // greatest uncommon ancestors using the function ANCESTOR and call MOVE
                        // SUBTREE to shift the subtree and prepare the shifts of smaller subtrees.
                        // Finally, we add a new thread (if necessary).
                        function apportion(v, w, ancestor) {
                            if (w) {
                                var vip = v,
                                    vop = v,
                                    vim = w,
                                    vom = vip.parent.children[0],
                                    sip = vip.m,
                                    sop = vop.m,
                                    sim = vim.m,
                                    som = vom.m,
                                    shift;
                                while (vim = nextRight(vim), vip = nextLeft(vip), vim && vip) {
                                    vom = nextLeft(vom);
                                    vop = nextRight(vop);
                                    vop.a = v;
                                    shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);
                                    if (shift > 0) {
                                        moveSubtree(nextAncestor(vim, v, ancestor), v, shift);
                                        sip += shift;
                                        sop += shift;
                                    }
                                    sim += vim.m;
                                    sip += vip.m;
                                    som += vom.m;
                                    sop += vop.m;
                                }
                                if (vim && !nextRight(vop)) {
                                    vop.t = vim;
                                    vop.m += sim - sop;
                                }
                                if (vip && !nextLeft(vom)) {
                                    vom.t = vip;
                                    vom.m += sip - som;
                                    ancestor = v;
                                }
                            }
                            return ancestor;
                        }

                        function sizeNode(node) {
                            node.x *= dx;
                            node.y = node.depth * dy;
                        }

                        tree.separation = function(x) {
                            return arguments.length ? (separation = x, tree) : separation;
                        };

                        tree.size = function(x) {
                            return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], tree) : (nodeSize ? null : [dx, dy]);
                        };

                        tree.nodeSize = function(x) {
                            return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], tree) : (nodeSize ? [dx, dy] : null);
                        };

                        return tree;
                    };

                    var treemapSlice = function(parent, x0, y0, x1, y1) {
                        var nodes = parent.children,
                            node,
                            i = -1,
                            n = nodes.length,
                            k = parent.value && (y1 - y0) / parent.value;

                        while (++i < n) {
                            node = nodes[i], node.x0 = x0, node.x1 = x1;
                            node.y0 = y0, node.y1 = y0 += node.value * k;
                        }
                    };

                    var phi = (1 + Math.sqrt(5)) / 2;

                    function squarifyRatio(ratio, parent, x0, y0, x1, y1) {
                        var rows = [],
                            nodes = parent.children,
                            row,
                            nodeValue,
                            i0 = 0,
                            i1 = 0,
                            n = nodes.length,
                            dx, dy,
                            value = parent.value,
                            sumValue,
                            minValue,
                            maxValue,
                            newRatio,
                            minRatio,
                            alpha,
                            beta;

                        while (i0 < n) {
                            dx = x1 - x0, dy = y1 - y0;

                            // Find the next non-empty node.
                            do sumValue = nodes[i1++].value; while (!sumValue && i1 < n);
                            minValue = maxValue = sumValue;
                            alpha = Math.max(dy / dx, dx / dy) / (value * ratio);
                            beta = sumValue * sumValue * alpha;
                            minRatio = Math.max(maxValue / beta, beta / minValue);

                            // Keep adding nodes while the aspect ratio maintains or improves.
                            for (; i1 < n; ++i1) {
                                sumValue += nodeValue = nodes[i1].value;
                                if (nodeValue < minValue) minValue = nodeValue;
                                if (nodeValue > maxValue) maxValue = nodeValue;
                                beta = sumValue * sumValue * alpha;
                                newRatio = Math.max(maxValue / beta, beta / minValue);
                                if (newRatio > minRatio) { sumValue -= nodeValue; break; }
                                minRatio = newRatio;
                            }

                            // Position and record the row orientation.
                            rows.push(row = { value: sumValue, dice: dx < dy, children: nodes.slice(i0, i1) });
                            if (row.dice) treemapDice(row, x0, y0, x1, value ? y0 += dy * sumValue / value : y1);
                            else treemapSlice(row, x0, y0, value ? x0 += dx * sumValue / value : x1, y1);
                            value -= sumValue, i0 = i1;
                        }

                        return rows;
                    }

                    var squarify = ((function custom(ratio) {

                        function squarify(parent, x0, y0, x1, y1) {
                            squarifyRatio(ratio, parent, x0, y0, x1, y1);
                        }

                        squarify.ratio = function(x) {
                            return custom((x = +x) > 1 ? x : 1);
                        };

                        return squarify;
                    }))(phi);

                    var index$3 = function() {
                        var tile = squarify,
                            round = false,
                            dx = 1,
                            dy = 1,
                            paddingStack = [0],
                            paddingInner = constantZero,
                            paddingTop = constantZero,
                            paddingRight = constantZero,
                            paddingBottom = constantZero,
                            paddingLeft = constantZero;

                        function treemap(root) {
                            root.x0 =
                                root.y0 = 0;
                            root.x1 = dx;
                            root.y1 = dy;
                            root.eachBefore(positionNode);
                            paddingStack = [0];
                            if (round) root.eachBefore(roundNode);
                            return root;
                        }

                        function positionNode(node) {
                            var p = paddingStack[node.depth],
                                x0 = node.x0 + p,
                                y0 = node.y0 + p,
                                x1 = node.x1 - p,
                                y1 = node.y1 - p;
                            if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
                            if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
                            node.x0 = x0;
                            node.y0 = y0;
                            node.x1 = x1;
                            node.y1 = y1;
                            if (node.children) {
                                p = paddingStack[node.depth + 1] = paddingInner(node) / 2;
                                x0 += paddingLeft(node) - p;
                                y0 += paddingTop(node) - p;
                                x1 -= paddingRight(node) - p;
                                y1 -= paddingBottom(node) - p;
                                if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
                                if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
                                tile(node, x0, y0, x1, y1);
                            }
                        }

                        treemap.round = function(x) {
                            return arguments.length ? (round = !!x, treemap) : round;
                        };

                        treemap.size = function(x) {
                            return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy];
                        };

                        treemap.tile = function(x) {
                            return arguments.length ? (tile = required(x), treemap) : tile;
                        };

                        treemap.padding = function(x) {
                            return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner();
                        };

                        treemap.paddingInner = function(x) {
                            return arguments.length ? (paddingInner = typeof x === "function" ? x : constant$8(+x), treemap) : paddingInner;
                        };

                        treemap.paddingOuter = function(x) {
                            return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop();
                        };

                        treemap.paddingTop = function(x) {
                            return arguments.length ? (paddingTop = typeof x === "function" ? x : constant$8(+x), treemap) : paddingTop;
                        };

                        treemap.paddingRight = function(x) {
                            return arguments.length ? (paddingRight = typeof x === "function" ? x : constant$8(+x), treemap) : paddingRight;
                        };

                        treemap.paddingBottom = function(x) {
                            return arguments.length ? (paddingBottom = typeof x === "function" ? x : constant$8(+x), treemap) : paddingBottom;
                        };

                        treemap.paddingLeft = function(x) {
                            return arguments.length ? (paddingLeft = typeof x === "function" ? x : constant$8(+x), treemap) : paddingLeft;
                        };

                        return treemap;
                    };

                    var binary = function(parent, x0, y0, x1, y1) {
                        var nodes = parent.children,
                            i, n = nodes.length,
                            sum, sums = new Array(n + 1);

                        for (sums[0] = sum = i = 0; i < n; ++i) {
                            sums[i + 1] = sum += nodes[i].value;
                        }

                        partition(0, n, parent.value, x0, y0, x1, y1);

                        function partition(i, j, value, x0, y0, x1, y1) {
                            if (i >= j - 1) {
                                var node = nodes[i];
                                node.x0 = x0, node.y0 = y0;
                                node.x1 = x1, node.y1 = y1;
                                return;
                            }

                            var valueOffset = sums[i],
                                valueTarget = (value / 2) + valueOffset,
                                k = i + 1,
                                hi = j - 1;

                            while (k < hi) {
                                var mid = k + hi >>> 1;
                                if (sums[mid] < valueTarget) k = mid + 1;
                                else hi = mid;
                            }

                            var valueLeft = sums[k] - valueOffset,
                                valueRight = value - valueLeft;

                            if ((y1 - y0) > (x1 - x0)) {
                                var yk = (y0 * valueRight + y1 * valueLeft) / value;
                                partition(i, k, valueLeft, x0, y0, x1, yk);
                                partition(k, j, valueRight, x0, yk, x1, y1);
                            } else {
                                var xk = (x0 * valueRight + x1 * valueLeft) / value;
                                partition(i, k, valueLeft, x0, y0, xk, y1);
                                partition(k, j, valueRight, xk, y0, x1, y1);
                            }
                        }
                    };

                    var sliceDice = function(parent, x0, y0, x1, y1) {
                        (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1);
                    };

                    var resquarify = ((function custom(ratio) {

                        function resquarify(parent, x0, y0, x1, y1) {
                            if ((rows = parent._squarify) && (rows.ratio === ratio)) {
                                var rows,
                                    row,
                                    nodes,
                                    i,
                                    j = -1,
                                    n,
                                    m = rows.length,
                                    value = parent.value;

                                while (++j < m) {
                                    row = rows[j], nodes = row.children;
                                    for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value;
                                    if (row.dice) treemapDice(row, x0, y0, x1, y0 += (y1 - y0) * row.value / value);
                                    else treemapSlice(row, x0, y0, x0 += (x1 - x0) * row.value / value, y1);
                                    value -= row.value;
                                }
                            } else {
                                parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1);
                                rows.ratio = ratio;
                            }
                        }

                        resquarify.ratio = function(x) {
                            return custom((x = +x) > 1 ? x : 1);
                        };

                        return resquarify;
                    }))(phi);

                    var area$1 = function(polygon) {
                        var i = -1,
                            n = polygon.length,
                            a,
                            b = polygon[n - 1],
                            area = 0;

                        while (++i < n) {
                            a = b;
                            b = polygon[i];
                            area += a[1] * b[0] - a[0] * b[1];
                        }

                        return area / 2;
                    };

                    var centroid$1 = function(polygon) {
                        var i = -1,
                            n = polygon.length,
                            x = 0,
                            y = 0,
                            a,
                            b = polygon[n - 1],
                            c,
                            k = 0;

                        while (++i < n) {
                            a = b;
                            b = polygon[i];
                            k += c = a[0] * b[1] - b[0] * a[1];
                            x += (a[0] + b[0]) * c;
                            y += (a[1] + b[1]) * c;
                        }

                        return k *= 3, [x / k, y / k];
                    };

                    // Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
                    // the 3D cross product in a quadrant I Cartesian coordinate system (+x is
                    // right, +y is up). Returns a positive value if ABC is counter-clockwise,
                    // negative if clockwise, and zero if the points are collinear.
                    var cross = function(a, b, c) {
                        return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
                    };

                    function lexicographicOrder(a, b) {
                        return a[0] - b[0] || a[1] - b[1];
                    }

                    // Computes the upper convex hull per the monotone chain algorithm.
                    // Assumes points.length >= 3, is sorted by x, unique in y.
                    // Returns an array of indices into points in left-to-right order.
                    function computeUpperHullIndexes(points) {
                        var n = points.length,
                            indexes = [0, 1],
                            size = 2;

                        for (var i = 2; i < n; ++i) {
                            while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size;
                            indexes[size++] = i;
                        }

                        return indexes.slice(0, size); // remove popped points
                    }

                    var hull = function(points) {
                        if ((n = points.length) < 3) return null;

                        var i,
                            n,
                            sortedPoints = new Array(n),
                            flippedPoints = new Array(n);

                        for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i];
                        sortedPoints.sort(lexicographicOrder);
                        for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];

                        var upperIndexes = computeUpperHullIndexes(sortedPoints),
                            lowerIndexes = computeUpperHullIndexes(flippedPoints);

                        // Construct the hull polygon, removing possible duplicate endpoints.
                        var skipLeft = lowerIndexes[0] === upperIndexes[0],
                            skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
                            hull = [];

                        // Add upper hull in right-to-l order.
                        // Then add lower hull in left-to-right order.
                        for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]);
                        for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]);

                        return hull;
                    };

                    var contains = function(polygon, point) {
                        var n = polygon.length,
                            p = polygon[n - 1],
                            x = point[0],
                            y = point[1],
                            x0 = p[0],
                            y0 = p[1],
                            x1, y1,
                            inside = false;

                        for (var i = 0; i < n; ++i) {
                            p = polygon[i], x1 = p[0], y1 = p[1];
                            if (((y1 > y) !== (y0 > y)) && (x < (x0 - x1) * (y - y1) / (y0 - y1) + x1)) inside = !inside;
                            x0 = x1, y0 = y1;
                        }

                        return inside;
                    };

                    var length$2 = function(polygon) {
                        var i = -1,
                            n = polygon.length,
                            b = polygon[n - 1],
                            xa,
                            ya,
                            xb = b[0],
                            yb = b[1],
                            perimeter = 0;

                        while (++i < n) {
                            xa = xb;
                            ya = yb;
                            b = polygon[i];
                            xb = b[0];
                            yb = b[1];
                            xa -= xb;
                            ya -= yb;
                            perimeter += Math.sqrt(xa * xa + ya * ya);
                        }

                        return perimeter;
                    };

                    var slice$3 = [].slice;

                    var noabort = {};

                    function Queue(size) {
                        if (!(size >= 1)) throw new Error;
                        this._size = size;
                        this._call =
                            this._error = null;
                        this._tasks = [];
                        this._data = [];
                        this._waiting =
                            this._active =
                            this._ended =
                            this._start = 0; // inside a synchronous task callback?
                    }

                    Queue.prototype = queue.prototype = {
                        constructor: Queue,
                        defer: function(callback) {
                            if (typeof callback !== "function" || this._call) throw new Error;
                            if (this._error != null) return this;
                            var t = slice$3.call(arguments, 1);
                            t.push(callback);
                            ++this._waiting, this._tasks.push(t);
                            poke$1(this);
                            return this;
                        },
                        abort: function() {
                            if (this._error == null) abort(this, new Error("abort"));
                            return this;
                        },
                        await: function(callback) {
                            if (typeof callback !== "function" || this._call) throw new Error;
                            this._call = function(error, results) { callback.apply(null, [error].concat(results)); };
                            maybeNotify(this);
                            return this;
                        },
                        awaitAll: function(callback) {
                            if (typeof callback !== "function" || this._call) throw new Error;
                            this._call = callback;
                            maybeNotify(this);
                            return this;
                        }
                    };

                    function poke$1(q) {
                        if (!q._start) {
                            try { start$1(q); } // let the current task complete
                            catch (e) {
                                if (q._tasks[q._ended + q._active - 1]) abort(q, e); // task errored synchronously
                                else if (!q._data) throw e; // await callback errored synchronously
                            }
                        }
                    }

                    function start$1(q) {
                        while (q._start = q._waiting && q._active < q._size) {
                            var i = q._ended + q._active,
                                t = q._tasks[i],
                                j = t.length - 1,
                                c = t[j];
                            t[j] = end(q, i);
                            --q._waiting, ++q._active;
                            t = c.apply(null, t);
                            if (!q._tasks[i]) continue; // task finished synchronously
                            q._tasks[i] = t || noabort;
                        }
                    }

                    function end(q, i) {
                        return function(e, r) {
                            if (!q._tasks[i]) return; // ignore multiple callbacks
                            --q._active, ++q._ended;
                            q._tasks[i] = null;
                            if (q._error != null) return; // ignore secondary errors
                            if (e != null) {
                                abort(q, e);
                            } else {
                                q._data[i] = r;
                                if (q._waiting) poke$1(q);
                                else maybeNotify(q);
                            }
                        };
                    }

                    function abort(q, e) {
                        var i = q._tasks.length,
                            t;
                        q._error = e; // ignore active callbacks
                        q._data = undefined; // allow gc
                        q._waiting = NaN; // prevent starting

                        while (--i >= 0) {
                            if (t = q._tasks[i]) {
                                q._tasks[i] = null;
                                if (t.abort) {
                                    try { t.abort(); } catch (e) { /* ignore */ }
                                }
                            }
                        }

                        q._active = NaN; // allow notification
                        maybeNotify(q);
                    }

                    function maybeNotify(q) {
                        if (!q._active && q._call) {
                            var d = q._data;
                            q._data = undefined; // allow gc
                            q._call(q._error, d);
                        }
                    }

                    function queue(concurrency) {
                        return new Queue(arguments.length ? +concurrency : Infinity);
                    }

                    var uniform = function(min, max) {
                        min = min == null ? 0 : +min;
                        max = max == null ? 1 : +max;
                        if (arguments.length === 1) max = min, min = 0;
                        else max -= min;
                        return function() {
                            return Math.random() * max + min;
                        };
                    };

                    var normal = function(mu, sigma) {
                        var x, r;
                        mu = mu == null ? 0 : +mu;
                        sigma = sigma == null ? 1 : +sigma;
                        return function() {
                            var y;

                            // If available, use the second previously-generated uniform random.
                            if (x != null) y = x, x = null;

                            // Otherwise, generate a new x and y.
                            else
                                do {
                                    x = Math.random() * 2 - 1;
                                    y = Math.random() * 2 - 1;
                                    r = x * x + y * y;
                                } while (!r || r > 1);

                            return mu + sigma * y * Math.sqrt(-2 * Math.log(r) / r);
                        };
                    };

                    var logNormal = function() {
                        var randomNormal = normal.apply(this, arguments);
                        return function() {
                            return Math.exp(randomNormal());
                        };
                    };

                    var irwinHall = function(n) {
                        return function() {
                            for (var sum = 0, i = 0; i < n; ++i) sum += Math.random();
                            return sum;
                        };
                    };

                    var bates = function(n) {
                        var randomIrwinHall = irwinHall(n);
                        return function() {
                            return randomIrwinHall() / n;
                        };
                    };

                    var exponential$1 = function(lambda) {
                        return function() {
                            return -Math.log(1 - Math.random()) / lambda;
                        };
                    };

                    var request = function(url, callback) {
                        var request,
                            event = dispatch("beforesend", "progress", "load", "error"),
                            mimeType,
                            headers = map$1(),
                            xhr = new XMLHttpRequest,
                            user = null,
                            password = null,
                            response,
                            responseType,
                            timeout = 0;

                        // If IE does not support CORS, use XDomainRequest.
                        if (typeof XDomainRequest !== "undefined" &&
                            !("withCredentials" in xhr) &&
                            /^(http(s)?:)?\/\//.test(url)) xhr = new XDomainRequest;

                        "onload" in xhr
                            ?
                            xhr.onload = xhr.onerror = xhr.ontimeout = respond :
                            xhr.onreadystatechange = function(o) { xhr.readyState > 3 && respond(o); };

                        function respond(o) {
                            var status = xhr.status,
                                result;
                            if (!status && hasResponse(xhr) ||
                                status >= 200 && status < 300 ||
                                status === 304) {
                                if (response) {
                                    try {
                                        result = response.call(request, xhr);
                                    } catch (e) {
                                        event.call("error", request, e);
                                        return;
                                    }
                                } else {
                                    result = xhr;
                                }
                                event.call("load", request, result);
                            } else {
                                event.call("error", request, o);
                            }
                        }

                        xhr.onprogress = function(e) {
                            event.call("progress", request, e);
                        };

                        request = {
                            header: function(name, value) {
                                name = (name + "").toLowerCase();
                                if (arguments.length < 2) return headers.get(name);
                                if (value == null) headers.remove(name);
                                else headers.set(name, value + "");
                                return request;
                            },

                            // If mimeType is non-null and no Accept header is set, a default is used.
                            mimeType: function(value) {
                                if (!arguments.length) return mimeType;
                                mimeType = value == null ? null : value + "";
                                return request;
                            },

                            // Specifies what type the response value should take;
                            // for instance, arraybuffer, blob, document, or text.
                            responseType: function(value) {
                                if (!arguments.length) return responseType;
                                responseType = value;
                                return request;
                            },

                            timeout: function(value) {
                                if (!arguments.length) return timeout;
                                timeout = +value;
                                return request;
                            },

                            user: function(value) {
                                return arguments.length < 1 ? user : (user = value == null ? null : value + "", request);
                            },

                            password: function(value) {
                                return arguments.length < 1 ? password : (password = value == null ? null : value + "", request);
                            },

                            // Specify how to convert the response content to a specific type;
                            // changes the callback value on "load" events.
                            response: function(value) {
                                response = value;
                                return request;
                            },

                            // Alias for send("GET", …).
                            get: function(data, callback) {
                                return request.send("GET", data, callback);
                            },

                            // Alias for send("POST", …).
                            post: function(data, callback) {
                                return request.send("POST", data, callback);
                            },

                            // If callback is non-null, it will be used for error and load events.
                            send: function(method, data, callback) {
                                xhr.open(method, url, true, user, password);
                                if (mimeType != null && !headers.has("accept")) headers.set("accept", mimeType + ",*/*");
                                if (xhr.setRequestHeader) headers.each(function(value, name) { xhr.setRequestHeader(name, value); });
                                if (mimeType != null && xhr.overrideMimeType) xhr.overrideMimeType(mimeType);
                                if (responseType != null) xhr.responseType = responseType;
                                if (timeout > 0) xhr.timeout = timeout;
                                if (callback == null && typeof data === "function") callback = data, data = null;
                                if (callback != null && callback.length === 1) callback = fixCallback(callback);
                                if (callback != null) request.on("error", callback).on("load", function(xhr) { callback(null, xhr); });
                                event.call("beforesend", request, xhr);
                                xhr.send(data == null ? null : data);
                                return request;
                            },

                            abort: function() {
                                xhr.abort();
                                return request;
                            },

                            on: function() {
                                var value = event.on.apply(event, arguments);
                                return value === event ? request : value;
                            }
                        };

                        if (callback != null) {
                            if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
                            return request.get(callback);
                        }

                        return request;
                    };

                    function fixCallback(callback) {
                        return function(error, xhr) {
                            callback(error == null ? xhr : null);
                        };
                    }

                    function hasResponse(xhr) {
                        var type = xhr.responseType;
                        return type && type !== "text" ?
                            xhr.response // null on error
                            :
                            xhr.responseText; // "" on error
                    }

                    var type$1 = function(defaultMimeType, response) {
                        return function(url, callback) {
                            var r = request(url).mimeType(defaultMimeType).response(response);
                            if (callback != null) {
                                if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
                                return r.get(callback);
                            }
                            return r;
                        };
                    };

                    var html = type$1("text/html", function(xhr) {
                        return document.createRange().createContextualFragment(xhr.responseText);
                    });

                    var json = type$1("application/json", function(xhr) {
                        return JSON.parse(xhr.responseText);
                    });

                    var text = type$1("text/plain", function(xhr) {
                        return xhr.responseText;
                    });

                    var xml = type$1("application/xml", function(xhr) {
                        var xml = xhr.responseXML;
                        if (!xml) throw new Error("parse error");
                        return xml;
                    });

                    var dsv$1 = function(defaultMimeType, parse) {
                        return function(url, row, callback) {
                            if (arguments.length < 3) callback = row, row = null;
                            var r = request(url).mimeType(defaultMimeType);
                            r.row = function(_) { return arguments.length ? r.response(responseOf(parse, row = _)) : row; };
                            r.row(row);
                            return callback ? r.get(callback) : r;
                        };
                    };

                    function responseOf(parse, row) {
                        return function(request$$1) {
                            return parse(request$$1.responseText, row);
                        };
                    }

                    var csv$1 = dsv$1("text/csv", csvParse);

                    var tsv$1 = dsv$1("text/tab-separated-values", tsvParse);

                    var array$2 = Array.prototype;

                    var map$3 = array$2.map;
                    var slice$4 = array$2.slice;

                    var implicit = { name: "implicit" };

                    function ordinal(range) {
                        var index = map$1(),
                            domain = [],
                            unknown = implicit;

                        range = range == null ? [] : slice$4.call(range);

                        function scale(d) {
                            var key = d + "",
                                i = index.get(key);
                            if (!i) {
                                if (unknown !== implicit) return unknown;
                                index.set(key, i = domain.push(d));
                            }
                            return range[(i - 1) % range.length];
                        }

                        scale.domain = function(_) {
                            if (!arguments.length) return domain.slice();
                            domain = [], index = map$1();
                            var i = -1,
                                n = _.length,
                                d, key;
                            while (++i < n)
                                if (!index.has(key = (d = _[i]) + "")) index.set(key, domain.push(d));
                            return scale;
                        };

                        scale.range = function(_) {
                            return arguments.length ? (range = slice$4.call(_), scale) : range.slice();
                        };

                        scale.unknown = function(_) {
                            return arguments.length ? (unknown = _, scale) : unknown;
                        };

                        scale.copy = function() {
                            return ordinal()
                                .domain(domain)
                                .range(range)
                                .unknown(unknown);
                        };

                        return scale;
                    }

                    function band() {
                        var scale = ordinal().unknown(undefined),
                            domain = scale.domain,
                            ordinalRange = scale.range,
                            range$$1 = [0, 1],
                            step,
                            bandwidth,
                            round = false,
                            paddingInner = 0,
                            paddingOuter = 0,
                            align = 0.5;

                        delete scale.unknown;

                        function rescale() {
                            var n = domain().length,
                                reverse = range$$1[1] < range$$1[0],
                                start = range$$1[reverse - 0],
                                stop = range$$1[1 - reverse];
                            step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);
                            if (round) step = Math.floor(step);
                            start += (stop - start - step * (n - paddingInner)) * align;
                            bandwidth = step * (1 - paddingInner);
                            if (round) start = Math.round(start), bandwidth = Math.round(bandwidth);
                            var values = sequence(n).map(function(i) { return start + step * i; });
                            return ordinalRange(reverse ? values.reverse() : values);
                        }

                        scale.domain = function(_) {
                            return arguments.length ? (domain(_), rescale()) : domain();
                        };

                        scale.range = function(_) {
                            return arguments.length ? (range$$1 = [+_[0], +_[1]], rescale()) : range$$1.slice();
                        };

                        scale.rangeRound = function(_) {
                            return range$$1 = [+_[0], +_[1]], round = true, rescale();
                        };

                        scale.bandwidth = function() {
                            return bandwidth;
                        };

                        scale.step = function() {
                            return step;
                        };

                        scale.round = function(_) {
                            return arguments.length ? (round = !!_, rescale()) : round;
                        };

                        scale.padding = function(_) {
                            return arguments.length ? (paddingInner = paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
                        };

                        scale.paddingInner = function(_) {
                            return arguments.length ? (paddingInner = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
                        };

                        scale.paddingOuter = function(_) {
                            return arguments.length ? (paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingOuter;
                        };

                        scale.align = function(_) {
                            return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align;
                        };

                        scale.copy = function() {
                            return band()
                                .domain(domain())
                                .range(range$$1)
                                .round(round)
                                .paddingInner(paddingInner)
                                .paddingOuter(paddingOuter)
                                .align(align);
                        };

                        return rescale();
                    }

                    function pointish(scale) {
                        var copy = scale.copy;

                        scale.padding = scale.paddingOuter;
                        delete scale.paddingInner;
                        delete scale.paddingOuter;

                        scale.copy = function() {
                            return pointish(copy());
                        };

                        return scale;
                    }

                    function point$1() {
                        return pointish(band().paddingInner(1));
                    }

                    var constant$9 = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    var number$1 = function(x) {
                        return +x;
                    };

                    var unit = [0, 1];

                    function deinterpolateLinear(a, b) {
                        return (b -= (a = +a)) ?

                            function(x) { return (x - a) / b; } :
                            constant$9(b);
                    }

                    function deinterpolateClamp(deinterpolate) {
                        return function(a, b) {
                            var d = deinterpolate(a = +a, b = +b);
                            return function(x) { return x <= a ? 0 : x >= b ? 1 : d(x); };
                        };
                    }

                    function reinterpolateClamp(reinterpolate) {
                        return function(a, b) {
                            var r = reinterpolate(a = +a, b = +b);
                            return function(t) { return t <= 0 ? a : t >= 1 ? b : r(t); };
                        };
                    }

                    function bimap(domain, range$$1, deinterpolate, reinterpolate) {
                        var d0 = domain[0],
                            d1 = domain[1],
                            r0 = range$$1[0],
                            r1 = range$$1[1];
                        if (d1 < d0) d0 = deinterpolate(d1, d0), r0 = reinterpolate(r1, r0);
                        else d0 = deinterpolate(d0, d1), r0 = reinterpolate(r0, r1);
                        return function(x) { return r0(d0(x)); };
                    }

                    function polymap(domain, range$$1, deinterpolate, reinterpolate) {
                        var j = Math.min(domain.length, range$$1.length) - 1,
                            d = new Array(j),
                            r = new Array(j),
                            i = -1;

                        // Reverse descending domains.
                        if (domain[j] < domain[0]) {
                            domain = domain.slice().reverse();
                            range$$1 = range$$1.slice().reverse();
                        }

                        while (++i < j) {
                            d[i] = deinterpolate(domain[i], domain[i + 1]);
                            r[i] = reinterpolate(range$$1[i], range$$1[i + 1]);
                        }

                        return function(x) {
                            var i = bisectRight(domain, x, 1, j) - 1;
                            return r[i](d[i](x));
                        };
                    }

                    function copy(source, target) {
                        return target
                            .domain(source.domain())
                            .range(source.range())
                            .interpolate(source.interpolate())
                            .clamp(source.clamp());
                    }

                    // deinterpolate(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
                    // reinterpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding domain value x in [a,b].
                    function continuous(deinterpolate, reinterpolate) {
                        var domain = unit,
                            range$$1 = unit,
                            interpolate$$1 = interpolateValue,
                            clamp = false,
                            piecewise,
                            output,
                            input;

                        function rescale() {
                            piecewise = Math.min(domain.length, range$$1.length) > 2 ? polymap : bimap;
                            output = input = null;
                            return scale;
                        }

                        function scale(x) {
                            return (output || (output = piecewise(domain, range$$1, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x);
                        }

                        scale.invert = function(y) {
                            return (input || (input = piecewise(range$$1, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y);
                        };

                        scale.domain = function(_) {
                            return arguments.length ? (domain = map$3.call(_, number$1), rescale()) : domain.slice();
                        };

                        scale.range = function(_) {
                            return arguments.length ? (range$$1 = slice$4.call(_), rescale()) : range$$1.slice();
                        };

                        scale.rangeRound = function(_) {
                            return range$$1 = slice$4.call(_), interpolate$$1 = interpolateRound, rescale();
                        };

                        scale.clamp = function(_) {
                            return arguments.length ? (clamp = !!_, rescale()) : clamp;
                        };

                        scale.interpolate = function(_) {
                            return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1;
                        };

                        return rescale();
                    }

                    var tickFormat = function(domain, count, specifier) {
                        var start = domain[0],
                            stop = domain[domain.length - 1],
                            step = tickStep(start, stop, count == null ? 10 : count),
                            precision;
                        specifier = formatSpecifier(specifier == null ? ",f" : specifier);
                        switch (specifier.type) {
                            case "s":
                                {
                                    var value = Math.max(Math.abs(start), Math.abs(stop));
                                    if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
                                    return exports.formatPrefix(specifier, value);
                                }
                            case "":
                            case "e":
                            case "g":
                            case "p":
                            case "r":
                                {
                                    if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
                                    break;
                                }
                            case "f":
                            case "%":
                                {
                                    if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
                                    break;
                                }
                        }
                        return exports.format(specifier);
                    };

                    function linearish(scale) {
                        var domain = scale.domain;

                        scale.ticks = function(count) {
                            var d = domain();
                            return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
                        };

                        scale.tickFormat = function(count, specifier) {
                            return tickFormat(domain(), count, specifier);
                        };

                        scale.nice = function(count) {
                            var d = domain(),
                                i = d.length - 1,
                                n = count == null ? 10 : count,
                                start = d[0],
                                stop = d[i],
                                step = tickStep(start, stop, n);

                            if (step) {
                                step = tickStep(Math.floor(start / step) * step, Math.ceil(stop / step) * step, n);
                                d[0] = Math.floor(start / step) * step;
                                d[i] = Math.ceil(stop / step) * step;
                                domain(d);
                            }

                            return scale;
                        };

                        return scale;
                    }

                    function linear$2() {
                        var scale = continuous(deinterpolateLinear, reinterpolate);

                        scale.copy = function() {
                            return copy(scale, linear$2());
                        };

                        return linearish(scale);
                    }

                    function identity$6() {
                        var domain = [0, 1];

                        function scale(x) {
                            return +x;
                        }

                        scale.invert = scale;

                        scale.domain = scale.range = function(_) {
                            return arguments.length ? (domain = map$3.call(_, number$1), scale) : domain.slice();
                        };

                        scale.copy = function() {
                            return identity$6().domain(domain);
                        };

                        return linearish(scale);
                    }

                    var nice = function(domain, interval) {
                        domain = domain.slice();

                        var i0 = 0,
                            i1 = domain.length - 1,
                            x0 = domain[i0],
                            x1 = domain[i1],
                            t;

                        if (x1 < x0) {
                            t = i0, i0 = i1, i1 = t;
                            t = x0, x0 = x1, x1 = t;
                        }

                        domain[i0] = interval.floor(x0);
                        domain[i1] = interval.ceil(x1);
                        return domain;
                    };

                    function deinterpolate(a, b) {
                        return (b = Math.log(b / a)) ?

                            function(x) { return Math.log(x / a) / b; } :
                            constant$9(b);
                    }

                    function reinterpolate$1(a, b) {
                        return a < 0 ?

                            function(t) { return -Math.pow(-b, t) * Math.pow(-a, 1 - t); } :
                            function(t) { return Math.pow(b, t) * Math.pow(a, 1 - t); };
                    }

                    function pow10(x) {
                        return isFinite(x) ? +("1e" + x) : x < 0 ? 0 : x;
                    }

                    function powp(base) {
                        return base === 10 ? pow10 :
                            base === Math.E ? Math.exp :
                            function(x) { return Math.pow(base, x); };
                    }

                    function logp(base) {
                        return base === Math.E ? Math.log :
                            base === 10 && Math.log10 ||
                            base === 2 && Math.log2 ||
                            (base = Math.log(base), function(x) { return Math.log(x) / base; });
                    }

                    function reflect(f) {
                        return function(x) {
                            return -f(-x);
                        };
                    }

                    function log$1() {
                        var scale = continuous(deinterpolate, reinterpolate$1).domain([1, 10]),
                            domain = scale.domain,
                            base = 10,
                            logs = logp(10),
                            pows = powp(10);

                        function rescale() {
                            logs = logp(base), pows = powp(base);
                            if (domain()[0] < 0) logs = reflect(logs), pows = reflect(pows);
                            return scale;
                        }

                        scale.base = function(_) {
                            return arguments.length ? (base = +_, rescale()) : base;
                        };

                        scale.domain = function(_) {
                            return arguments.length ? (domain(_), rescale()) : domain();
                        };

                        scale.ticks = function(count) {
                            var d = domain(),
                                u = d[0],
                                v = d[d.length - 1],
                                r;

                            if (r = v < u) i = u, u = v, v = i;

                            var i = logs(u),
                                j = logs(v),
                                p,
                                k,
                                t,
                                n = count == null ? 10 : +count,
                                z = [];

                            if (!(base % 1) && j - i < n) {
                                i = Math.round(i) - 1, j = Math.round(j) + 1;
                                if (u > 0)
                                    for (; i < j; ++i) {
                                        for (k = 1, p = pows(i); k < base; ++k) {
                                            t = p * k;
                                            if (t < u) continue;
                                            if (t > v) break;
                                            z.push(t);
                                        }
                                    } else
                                        for (; i < j; ++i) {
                                            for (k = base - 1, p = pows(i); k >= 1; --k) {
                                                t = p * k;
                                                if (t < u) continue;
                                                if (t > v) break;
                                                z.push(t);
                                            }
                                        }
                            } else {
                                z = ticks(i, j, Math.min(j - i, n)).map(pows);
                            }

                            return r ? z.reverse() : z;
                        };

                        scale.tickFormat = function(count, specifier) {
                            if (specifier == null) specifier = base === 10 ? ".0e" : ",";
                            if (typeof specifier !== "function") specifier = exports.format(specifier);
                            if (count === Infinity) return specifier;
                            if (count == null) count = 10;
                            var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?
                            return function(d) {
                                var i = d / pows(Math.round(logs(d)));
                                if (i * base < base - 0.5) i *= base;
                                return i <= k ? specifier(d) : "";
                            };
                        };

                        scale.nice = function() {
                            return domain(nice(domain(), {
                                floor: function(x) { return pows(Math.floor(logs(x))); },
                                ceil: function(x) { return pows(Math.ceil(logs(x))); }
                            }));
                        };

                        scale.copy = function() {
                            return copy(scale, log$1().base(base));
                        };

                        return scale;
                    }

                    function raise$1(x, exponent) {
                        return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
                    }

                    function pow$1() {
                        var exponent = 1,
                            scale = continuous(deinterpolate, reinterpolate),
                            domain = scale.domain;

                        function deinterpolate(a, b) {
                            return (b = raise$1(b, exponent) - (a = raise$1(a, exponent))) ?

                                function(x) { return (raise$1(x, exponent) - a) / b; } :
                                constant$9(b);
                        }

                        function reinterpolate(a, b) {
                            b = raise$1(b, exponent) - (a = raise$1(a, exponent));
                            return function(t) { return raise$1(a + b * t, 1 / exponent); };
                        }

                        scale.exponent = function(_) {
                            return arguments.length ? (exponent = +_, domain(domain())) : exponent;
                        };

                        scale.copy = function() {
                            return copy(scale, pow$1().exponent(exponent));
                        };

                        return linearish(scale);
                    }

                    function sqrt$1() {
                        return pow$1().exponent(0.5);
                    }

                    function quantile$$1() {
                        var domain = [],
                            range$$1 = [],
                            thresholds = [];

                        function rescale() {
                            var i = 0,
                                n = Math.max(1, range$$1.length);
                            thresholds = new Array(n - 1);
                            while (++i < n) thresholds[i - 1] = threshold(domain, i / n);
                            return scale;
                        }

                        function scale(x) {
                            if (!isNaN(x = +x)) return range$$1[bisectRight(thresholds, x)];
                        }

                        scale.invertExtent = function(y) {
                            var i = range$$1.indexOf(y);
                            return i < 0 ? [NaN, NaN] : [
                                i > 0 ? thresholds[i - 1] : domain[0],
                                i < thresholds.length ? thresholds[i] : domain[domain.length - 1]
                            ];
                        };

                        scale.domain = function(_) {
                            if (!arguments.length) return domain.slice();
                            domain = [];
                            for (var i = 0, n = _.length, d; i < n; ++i)
                                if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d);
                            domain.sort(ascending);
                            return rescale();
                        };

                        scale.range = function(_) {
                            return arguments.length ? (range$$1 = slice$4.call(_), rescale()) : range$$1.slice();
                        };

                        scale.quantiles = function() {
                            return thresholds.slice();
                        };

                        scale.copy = function() {
                            return quantile$$1()
                                .domain(domain)
                                .range(range$$1);
                        };

                        return scale;
                    }

                    function quantize$1() {
                        var x0 = 0,
                            x1 = 1,
                            n = 1,
                            domain = [0.5],
                            range$$1 = [0, 1];

                        function scale(x) {
                            if (x <= x) return range$$1[bisectRight(domain, x, 0, n)];
                        }

                        function rescale() {
                            var i = -1;
                            domain = new Array(n);
                            while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
                            return scale;
                        }

                        scale.domain = function(_) {
                            return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];
                        };

                        scale.range = function(_) {
                            return arguments.length ? (n = (range$$1 = slice$4.call(_)).length - 1, rescale()) : range$$1.slice();
                        };

                        scale.invertExtent = function(y) {
                            var i = range$$1.indexOf(y);
                            return i < 0 ? [NaN, NaN] :
                                i < 1 ? [x0, domain[0]] :
                                i >= n ? [domain[n - 1], x1] : [domain[i - 1], domain[i]];
                        };

                        scale.copy = function() {
                            return quantize$1()
                                .domain([x0, x1])
                                .range(range$$1);
                        };

                        return linearish(scale);
                    }

                    function threshold$1() {
                        var domain = [0.5],
                            range$$1 = [0, 1],
                            n = 1;

                        function scale(x) {
                            if (x <= x) return range$$1[bisectRight(domain, x, 0, n)];
                        }

                        scale.domain = function(_) {
                            return arguments.length ? (domain = slice$4.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : domain.slice();
                        };

                        scale.range = function(_) {
                            return arguments.length ? (range$$1 = slice$4.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : range$$1.slice();
                        };

                        scale.invertExtent = function(y) {
                            var i = range$$1.indexOf(y);
                            return [domain[i - 1], domain[i]];
                        };

                        scale.copy = function() {
                            return threshold$1()
                                .domain(domain)
                                .range(range$$1);
                        };

                        return scale;
                    }

                    var t0$1 = new Date;
                    var t1$1 = new Date;

                    function newInterval(floori, offseti, count, field) {

                        function interval(date) {
                            return floori(date = new Date(+date)), date;
                        }

                        interval.floor = interval;

                        interval.ceil = function(date) {
                            return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
                        };

                        interval.round = function(date) {
                            var d0 = interval(date),
                                d1 = interval.ceil(date);
                            return date - d0 < d1 - date ? d0 : d1;
                        };

                        interval.offset = function(date, step) {
                            return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
                        };

                        interval.range = function(start, stop, step) {
                            var range = [];
                            start = interval.ceil(start);
                            step = step == null ? 1 : Math.floor(step);
                            if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
                            do range.push(new Date(+start)); while (offseti(start, step), floori(start), start < stop)
                            return range;
                        };

                        interval.filter = function(test) {
                            return newInterval(function(date) {
                                if (date >= date)
                                    while (floori(date), !test(date)) date.setTime(date - 1);
                            }, function(date, step) {
                                if (date >= date)
                                    while (--step >= 0)
                                        while (offseti(date, 1), !test(date)) {} // eslint-disable-line no-empty
                            });
                        };

                        if (count) {
                            interval.count = function(start, end) {
                                t0$1.setTime(+start), t1$1.setTime(+end);
                                floori(t0$1), floori(t1$1);
                                return Math.floor(count(t0$1, t1$1));
                            };

                            interval.every = function(step) {
                                step = Math.floor(step);
                                return !isFinite(step) || !(step > 0) ? null :
                                    !(step > 1) ? interval :
                                    interval.filter(field ?

                                        function(d) { return field(d) % step === 0; } :
                                        function(d) { return interval.count(0, d) % step === 0; });
                            };
                        }

                        return interval;
                    }

                    var millisecond = newInterval(function() {
                        // noop
                    }, function(date, step) {
                        date.setTime(+date + step);
                    }, function(start, end) {
                        return end - start;
                    });

                    // An optimized implementation for this simple case.
                    millisecond.every = function(k) {
                        k = Math.floor(k);
                        if (!isFinite(k) || !(k > 0)) return null;
                        if (!(k > 1)) return millisecond;
                        return newInterval(function(date) {
                            date.setTime(Math.floor(date / k) * k);
                        }, function(date, step) {
                            date.setTime(+date + step * k);
                        }, function(start, end) {
                            return (end - start) / k;
                        });
                    };

                    var milliseconds = millisecond.range;

                    var durationSecond$1 = 1e3;
                    var durationMinute$1 = 6e4;
                    var durationHour$1 = 36e5;
                    var durationDay$1 = 864e5;
                    var durationWeek$1 = 6048e5;

                    var second = newInterval(function(date) {
                        date.setTime(Math.floor(date / durationSecond$1) * durationSecond$1);
                    }, function(date, step) {
                        date.setTime(+date + step * durationSecond$1);
                    }, function(start, end) {
                        return (end - start) / durationSecond$1;
                    }, function(date) {
                        return date.getUTCSeconds();
                    });

                    var seconds = second.range;

                    var minute = newInterval(function(date) {
                        date.setTime(Math.floor(date / durationMinute$1) * durationMinute$1);
                    }, function(date, step) {
                        date.setTime(+date + step * durationMinute$1);
                    }, function(start, end) {
                        return (end - start) / durationMinute$1;
                    }, function(date) {
                        return date.getMinutes();
                    });

                    var minutes = minute.range;

                    var hour = newInterval(function(date) {
                        var offset = date.getTimezoneOffset() * durationMinute$1 % durationHour$1;
                        if (offset < 0) offset += durationHour$1;
                        date.setTime(Math.floor((+date - offset) / durationHour$1) * durationHour$1 + offset);
                    }, function(date, step) {
                        date.setTime(+date + step * durationHour$1);
                    }, function(start, end) {
                        return (end - start) / durationHour$1;
                    }, function(date) {
                        return date.getHours();
                    });

                    var hours = hour.range;

                    var day = newInterval(function(date) {
                        date.setHours(0, 0, 0, 0);
                    }, function(date, step) {
                        date.setDate(date.getDate() + step);
                    }, function(start, end) {
                        return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationDay$1;
                    }, function(date) {
                        return date.getDate() - 1;
                    });

                    var days = day.range;

                    function weekday(i) {
                        return newInterval(function(date) {
                            date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
                            date.setHours(0, 0, 0, 0);
                        }, function(date, step) {
                            date.setDate(date.getDate() + step * 7);
                        }, function(start, end) {
                            return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationWeek$1;
                        });
                    }

                    var sunday = weekday(0);
                    var monday = weekday(1);
                    var tuesday = weekday(2);
                    var wednesday = weekday(3);
                    var thursday = weekday(4);
                    var friday = weekday(5);
                    var saturday = weekday(6);

                    var sundays = sunday.range;
                    var mondays = monday.range;
                    var tuesdays = tuesday.range;
                    var wednesdays = wednesday.range;
                    var thursdays = thursday.range;
                    var fridays = friday.range;
                    var saturdays = saturday.range;

                    var month = newInterval(function(date) {
                        date.setDate(1);
                        date.setHours(0, 0, 0, 0);
                    }, function(date, step) {
                        date.setMonth(date.getMonth() + step);
                    }, function(start, end) {
                        return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
                    }, function(date) {
                        return date.getMonth();
                    });

                    var months = month.range;

                    var year = newInterval(function(date) {
                        date.setMonth(0, 1);
                        date.setHours(0, 0, 0, 0);
                    }, function(date, step) {
                        date.setFullYear(date.getFullYear() + step);
                    }, function(start, end) {
                        return end.getFullYear() - start.getFullYear();
                    }, function(date) {
                        return date.getFullYear();
                    });

                    // An optimized implementation for this simple case.
                    year.every = function(k) {
                        return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
                            date.setFullYear(Math.floor(date.getFullYear() / k) * k);
                            date.setMonth(0, 1);
                            date.setHours(0, 0, 0, 0);
                        }, function(date, step) {
                            date.setFullYear(date.getFullYear() + step * k);
                        });
                    };

                    var years = year.range;

                    var utcMinute = newInterval(function(date) {
                        date.setUTCSeconds(0, 0);
                    }, function(date, step) {
                        date.setTime(+date + step * durationMinute$1);
                    }, function(start, end) {
                        return (end - start) / durationMinute$1;
                    }, function(date) {
                        return date.getUTCMinutes();
                    });

                    var utcMinutes = utcMinute.range;

                    var utcHour = newInterval(function(date) {
                        date.setUTCMinutes(0, 0, 0);
                    }, function(date, step) {
                        date.setTime(+date + step * durationHour$1);
                    }, function(start, end) {
                        return (end - start) / durationHour$1;
                    }, function(date) {
                        return date.getUTCHours();
                    });

                    var utcHours = utcHour.range;

                    var utcDay = newInterval(function(date) {
                        date.setUTCHours(0, 0, 0, 0);
                    }, function(date, step) {
                        date.setUTCDate(date.getUTCDate() + step);
                    }, function(start, end) {
                        return (end - start) / durationDay$1;
                    }, function(date) {
                        return date.getUTCDate() - 1;
                    });

                    var utcDays = utcDay.range;

                    function utcWeekday(i) {
                        return newInterval(function(date) {
                            date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
                            date.setUTCHours(0, 0, 0, 0);
                        }, function(date, step) {
                            date.setUTCDate(date.getUTCDate() + step * 7);
                        }, function(start, end) {
                            return (end - start) / durationWeek$1;
                        });
                    }

                    var utcSunday = utcWeekday(0);
                    var utcMonday = utcWeekday(1);
                    var utcTuesday = utcWeekday(2);
                    var utcWednesday = utcWeekday(3);
                    var utcThursday = utcWeekday(4);
                    var utcFriday = utcWeekday(5);
                    var utcSaturday = utcWeekday(6);

                    var utcSundays = utcSunday.range;
                    var utcMondays = utcMonday.range;
                    var utcTuesdays = utcTuesday.range;
                    var utcWednesdays = utcWednesday.range;
                    var utcThursdays = utcThursday.range;
                    var utcFridays = utcFriday.range;
                    var utcSaturdays = utcSaturday.range;

                    var utcMonth = newInterval(function(date) {
                        date.setUTCDate(1);
                        date.setUTCHours(0, 0, 0, 0);
                    }, function(date, step) {
                        date.setUTCMonth(date.getUTCMonth() + step);
                    }, function(start, end) {
                        return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
                    }, function(date) {
                        return date.getUTCMonth();
                    });

                    var utcMonths = utcMonth.range;

                    var utcYear = newInterval(function(date) {
                        date.setUTCMonth(0, 1);
                        date.setUTCHours(0, 0, 0, 0);
                    }, function(date, step) {
                        date.setUTCFullYear(date.getUTCFullYear() + step);
                    }, function(start, end) {
                        return end.getUTCFullYear() - start.getUTCFullYear();
                    }, function(date) {
                        return date.getUTCFullYear();
                    });

                    // An optimized implementation for this simple case.
                    utcYear.every = function(k) {
                        return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
                            date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
                            date.setUTCMonth(0, 1);
                            date.setUTCHours(0, 0, 0, 0);
                        }, function(date, step) {
                            date.setUTCFullYear(date.getUTCFullYear() + step * k);
                        });
                    };

                    var utcYears = utcYear.range;

                    function localDate(d) {
                        if (0 <= d.y && d.y < 100) {
                            var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);
                            date.setFullYear(d.y);
                            return date;
                        }
                        return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);
                    }

                    function utcDate(d) {
                        if (0 <= d.y && d.y < 100) {
                            var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));
                            date.setUTCFullYear(d.y);
                            return date;
                        }
                        return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));
                    }

                    function newYear(y) {
                        return { y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0 };
                    }

                    function formatLocale$1(locale) {
                        var locale_dateTime = locale.dateTime,
                            locale_date = locale.date,
                            locale_time = locale.time,
                            locale_periods = locale.periods,
                            locale_weekdays = locale.days,
                            locale_shortWeekdays = locale.shortDays,
                            locale_months = locale.months,
                            locale_shortMonths = locale.shortMonths;

                        var periodRe = formatRe(locale_periods),
                            periodLookup = formatLookup(locale_periods),
                            weekdayRe = formatRe(locale_weekdays),
                            weekdayLookup = formatLookup(locale_weekdays),
                            shortWeekdayRe = formatRe(locale_shortWeekdays),
                            shortWeekdayLookup = formatLookup(locale_shortWeekdays),
                            monthRe = formatRe(locale_months),
                            monthLookup = formatLookup(locale_months),
                            shortMonthRe = formatRe(locale_shortMonths),
                            shortMonthLookup = formatLookup(locale_shortMonths);

                        var formats = {
                            "a": formatShortWeekday,
                            "A": formatWeekday,
                            "b": formatShortMonth,
                            "B": formatMonth,
                            "c": null,
                            "d": formatDayOfMonth,
                            "e": formatDayOfMonth,
                            "H": formatHour24,
                            "I": formatHour12,
                            "j": formatDayOfYear,
                            "L": formatMilliseconds,
                            "m": formatMonthNumber,
                            "M": formatMinutes,
                            "p": formatPeriod,
                            "S": formatSeconds,
                            "U": formatWeekNumberSunday,
                            "w": formatWeekdayNumber,
                            "W": formatWeekNumberMonday,
                            "x": null,
                            "X": null,
                            "y": formatYear,
                            "Y": formatFullYear,
                            "Z": formatZone,
                            "%": formatLiteralPercent
                        };

                        var utcFormats = {
                            "a": formatUTCShortWeekday,
                            "A": formatUTCWeekday,
                            "b": formatUTCShortMonth,
                            "B": formatUTCMonth,
                            "c": null,
                            "d": formatUTCDayOfMonth,
                            "e": formatUTCDayOfMonth,
                            "H": formatUTCHour24,
                            "I": formatUTCHour12,
                            "j": formatUTCDayOfYear,
                            "L": formatUTCMilliseconds,
                            "m": formatUTCMonthNumber,
                            "M": formatUTCMinutes,
                            "p": formatUTCPeriod,
                            "S": formatUTCSeconds,
                            "U": formatUTCWeekNumberSunday,
                            "w": formatUTCWeekdayNumber,
                            "W": formatUTCWeekNumberMonday,
                            "x": null,
                            "X": null,
                            "y": formatUTCYear,
                            "Y": formatUTCFullYear,
                            "Z": formatUTCZone,
                            "%": formatLiteralPercent
                        };

                        var parses = {
                            "a": parseShortWeekday,
                            "A": parseWeekday,
                            "b": parseShortMonth,
                            "B": parseMonth,
                            "c": parseLocaleDateTime,
                            "d": parseDayOfMonth,
                            "e": parseDayOfMonth,
                            "H": parseHour24,
                            "I": parseHour24,
                            "j": parseDayOfYear,
                            "L": parseMilliseconds,
                            "m": parseMonthNumber,
                            "M": parseMinutes,
                            "p": parsePeriod,
                            "S": parseSeconds,
                            "U": parseWeekNumberSunday,
                            "w": parseWeekdayNumber,
                            "W": parseWeekNumberMonday,
                            "x": parseLocaleDate,
                            "X": parseLocaleTime,
                            "y": parseYear,
                            "Y": parseFullYear,
                            "Z": parseZone,
                            "%": parseLiteralPercent
                        };

                        // These recursive directive definitions must be deferred.
                        formats.x = newFormat(locale_date, formats);
                        formats.X = newFormat(locale_time, formats);
                        formats.c = newFormat(locale_dateTime, formats);
                        utcFormats.x = newFormat(locale_date, utcFormats);
                        utcFormats.X = newFormat(locale_time, utcFormats);
                        utcFormats.c = newFormat(locale_dateTime, utcFormats);

                        function newFormat(specifier, formats) {
                            return function(date) {
                                var string = [],
                                    i = -1,
                                    j = 0,
                                    n = specifier.length,
                                    c,
                                    pad,
                                    format;

                                if (!(date instanceof Date)) date = new Date(+date);

                                while (++i < n) {
                                    if (specifier.charCodeAt(i) === 37) {
                                        string.push(specifier.slice(j, i));
                                        if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);
                                        else pad = c === "e" ? " " : "0";
                                        if (format = formats[c]) c = format(date, pad);
                                        string.push(c);
                                        j = i + 1;
                                    }
                                }

                                string.push(specifier.slice(j, i));
                                return string.join("");
                            };
                        }

                        function newParse(specifier, newDate) {
                            return function(string) {
                                var d = newYear(1900),
                                    i = parseSpecifier(d, specifier, string += "", 0);
                                if (i != string.length) return null;

                                // The am-pm flag is 0 for AM, and 1 for PM.
                                if ("p" in d) d.H = d.H % 12 + d.p * 12;

                                // Convert day-of-week and week-of-year to day-of-year.
                                if ("W" in d || "U" in d) {
                                    if (!("w" in d)) d.w = "W" in d ? 1 : 0;
                                    var day$$1 = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();
                                    d.m = 0;
                                    d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7;
                                }

                                // If a time zone is specified, all fields are interpreted as UTC and then
                                // offset according to the specified time zone.
                                if ("Z" in d) {
                                    d.H += d.Z / 100 | 0;
                                    d.M += d.Z % 100;
                                    return utcDate(d);
                                }

                                // Otherwise, all fields are in local time.
                                return newDate(d);
                            };
                        }

                        function parseSpecifier(d, specifier, string, j) {
                            var i = 0,
                                n = specifier.length,
                                m = string.length,
                                c,
                                parse;

                            while (i < n) {
                                if (j >= m) return -1;
                                c = specifier.charCodeAt(i++);
                                if (c === 37) {
                                    c = specifier.charAt(i++);
                                    parse = parses[c in pads ? specifier.charAt(i++) : c];
                                    if (!parse || ((j = parse(d, string, j)) < 0)) return -1;
                                } else if (c != string.charCodeAt(j++)) {
                                    return -1;
                                }
                            }

                            return j;
                        }

                        function parsePeriod(d, string, i) {
                            var n = periodRe.exec(string.slice(i));
                            return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;
                        }

                        function parseShortWeekday(d, string, i) {
                            var n = shortWeekdayRe.exec(string.slice(i));
                            return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
                        }

                        function parseWeekday(d, string, i) {
                            var n = weekdayRe.exec(string.slice(i));
                            return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
                        }

                        function parseShortMonth(d, string, i) {
                            var n = shortMonthRe.exec(string.slice(i));
                            return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
                        }

                        function parseMonth(d, string, i) {
                            var n = monthRe.exec(string.slice(i));
                            return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
                        }

                        function parseLocaleDateTime(d, string, i) {
                            return parseSpecifier(d, locale_dateTime, string, i);
                        }

                        function parseLocaleDate(d, string, i) {
                            return parseSpecifier(d, locale_date, string, i);
                        }

                        function parseLocaleTime(d, string, i) {
                            return parseSpecifier(d, locale_time, string, i);
                        }

                        function formatShortWeekday(d) {
                            return locale_shortWeekdays[d.getDay()];
                        }

                        function formatWeekday(d) {
                            return locale_weekdays[d.getDay()];
                        }

                        function formatShortMonth(d) {
                            return locale_shortMonths[d.getMonth()];
                        }

                        function formatMonth(d) {
                            return locale_months[d.getMonth()];
                        }

                        function formatPeriod(d) {
                            return locale_periods[+(d.getHours() >= 12)];
                        }

                        function formatUTCShortWeekday(d) {
                            return locale_shortWeekdays[d.getUTCDay()];
                        }

                        function formatUTCWeekday(d) {
                            return locale_weekdays[d.getUTCDay()];
                        }

                        function formatUTCShortMonth(d) {
                            return locale_shortMonths[d.getUTCMonth()];
                        }

                        function formatUTCMonth(d) {
                            return locale_months[d.getUTCMonth()];
                        }

                        function formatUTCPeriod(d) {
                            return locale_periods[+(d.getUTCHours() >= 12)];
                        }

                        return {
                            format: function(specifier) {
                                var f = newFormat(specifier += "", formats);
                                f.toString = function() { return specifier; };
                                return f;
                            },
                            parse: function(specifier) {
                                var p = newParse(specifier += "", localDate);
                                p.toString = function() { return specifier; };
                                return p;
                            },
                            utcFormat: function(specifier) {
                                var f = newFormat(specifier += "", utcFormats);
                                f.toString = function() { return specifier; };
                                return f;
                            },
                            utcParse: function(specifier) {
                                var p = newParse(specifier, utcDate);
                                p.toString = function() { return specifier; };
                                return p;
                            }
                        };
                    }

                    var pads = { "-": "", "_": " ", "0": "0" };
                    var numberRe = /^\s*\d+/;
                    var percentRe = /^%/;
                    var requoteRe = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g;

                    function pad(value, fill, width) {
                        var sign = value < 0 ? "-" : "",
                            string = (sign ? -value : value) + "",
                            length = string.length;
                        return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);
                    }

                    function requote(s) {
                        return s.replace(requoteRe, "\\$&");
                    }

                    function formatRe(names) {
                        return new RegExp("^(?:" + names.map(requote).join("|") + ")", "i");
                    }

                    function formatLookup(names) {
                        var map = {},
                            i = -1,
                            n = names.length;
                        while (++i < n) map[names[i].toLowerCase()] = i;
                        return map;
                    }

                    function parseWeekdayNumber(d, string, i) {
                        var n = numberRe.exec(string.slice(i, i + 1));
                        return n ? (d.w = +n[0], i + n[0].length) : -1;
                    }

                    function parseWeekNumberSunday(d, string, i) {
                        var n = numberRe.exec(string.slice(i));
                        return n ? (d.U = +n[0], i + n[0].length) : -1;
                    }

                    function parseWeekNumberMonday(d, string, i) {
                        var n = numberRe.exec(string.slice(i));
                        return n ? (d.W = +n[0], i + n[0].length) : -1;
                    }

                    function parseFullYear(d, string, i) {
                        var n = numberRe.exec(string.slice(i, i + 4));
                        return n ? (d.y = +n[0], i + n[0].length) : -1;
                    }

                    function parseYear(d, string, i) {
                        var n = numberRe.exec(string.slice(i, i + 2));
                        return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;
                    }

                    function parseZone(d, string, i) {
                        var n = /^(Z)|([+-]\d\d)(?:\:?(\d\d))?/.exec(string.slice(i, i + 6));
                        return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;
                    }

                    function parseMonthNumber(d, string, i) {
                        var n = numberRe.exec(string.slice(i, i + 2));
                        return n ? (d.m = n[0] - 1, i + n[0].length) : -1;
                    }

                    function parseDayOfMonth(d, string, i) {
                        var n = numberRe.exec(string.slice(i, i + 2));
                        return n ? (d.d = +n[0], i + n[0].length) : -1;
                    }

                    function parseDayOfYear(d, string, i) {
                        var n = numberRe.exec(string.slice(i, i + 3));
                        return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;
                    }

                    function parseHour24(d, string, i) {
                        var n = numberRe.exec(string.slice(i, i + 2));
                        return n ? (d.H = +n[0], i + n[0].length) : -1;
                    }

                    function parseMinutes(d, string, i) {
                        var n = numberRe.exec(string.slice(i, i + 2));
                        return n ? (d.M = +n[0], i + n[0].length) : -1;
                    }

                    function parseSeconds(d, string, i) {
                        var n = numberRe.exec(string.slice(i, i + 2));
                        return n ? (d.S = +n[0], i + n[0].length) : -1;
                    }

                    function parseMilliseconds(d, string, i) {
                        var n = numberRe.exec(string.slice(i, i + 3));
                        return n ? (d.L = +n[0], i + n[0].length) : -1;
                    }

                    function parseLiteralPercent(d, string, i) {
                        var n = percentRe.exec(string.slice(i, i + 1));
                        return n ? i + n[0].length : -1;
                    }

                    function formatDayOfMonth(d, p) {
                        return pad(d.getDate(), p, 2);
                    }

                    function formatHour24(d, p) {
                        return pad(d.getHours(), p, 2);
                    }

                    function formatHour12(d, p) {
                        return pad(d.getHours() % 12 || 12, p, 2);
                    }

                    function formatDayOfYear(d, p) {
                        return pad(1 + day.count(year(d), d), p, 3);
                    }

                    function formatMilliseconds(d, p) {
                        return pad(d.getMilliseconds(), p, 3);
                    }

                    function formatMonthNumber(d, p) {
                        return pad(d.getMonth() + 1, p, 2);
                    }

                    function formatMinutes(d, p) {
                        return pad(d.getMinutes(), p, 2);
                    }

                    function formatSeconds(d, p) {
                        return pad(d.getSeconds(), p, 2);
                    }

                    function formatWeekNumberSunday(d, p) {
                        return pad(sunday.count(year(d), d), p, 2);
                    }

                    function formatWeekdayNumber(d) {
                        return d.getDay();
                    }

                    function formatWeekNumberMonday(d, p) {
                        return pad(monday.count(year(d), d), p, 2);
                    }

                    function formatYear(d, p) {
                        return pad(d.getFullYear() % 100, p, 2);
                    }

                    function formatFullYear(d, p) {
                        return pad(d.getFullYear() % 10000, p, 4);
                    }

                    function formatZone(d) {
                        var z = d.getTimezoneOffset();
                        return (z > 0 ? "-" : (z *= -1, "+")) +
                            pad(z / 60 | 0, "0", 2) +
                            pad(z % 60, "0", 2);
                    }

                    function formatUTCDayOfMonth(d, p) {
                        return pad(d.getUTCDate(), p, 2);
                    }

                    function formatUTCHour24(d, p) {
                        return pad(d.getUTCHours(), p, 2);
                    }

                    function formatUTCHour12(d, p) {
                        return pad(d.getUTCHours() % 12 || 12, p, 2);
                    }

                    function formatUTCDayOfYear(d, p) {
                        return pad(1 + utcDay.count(utcYear(d), d), p, 3);
                    }

                    function formatUTCMilliseconds(d, p) {
                        return pad(d.getUTCMilliseconds(), p, 3);
                    }

                    function formatUTCMonthNumber(d, p) {
                        return pad(d.getUTCMonth() + 1, p, 2);
                    }

                    function formatUTCMinutes(d, p) {
                        return pad(d.getUTCMinutes(), p, 2);
                    }

                    function formatUTCSeconds(d, p) {
                        return pad(d.getUTCSeconds(), p, 2);
                    }

                    function formatUTCWeekNumberSunday(d, p) {
                        return pad(utcSunday.count(utcYear(d), d), p, 2);
                    }

                    function formatUTCWeekdayNumber(d) {
                        return d.getUTCDay();
                    }

                    function formatUTCWeekNumberMonday(d, p) {
                        return pad(utcMonday.count(utcYear(d), d), p, 2);
                    }

                    function formatUTCYear(d, p) {
                        return pad(d.getUTCFullYear() % 100, p, 2);
                    }

                    function formatUTCFullYear(d, p) {
                        return pad(d.getUTCFullYear() % 10000, p, 4);
                    }

                    function formatUTCZone() {
                        return "+0000";
                    }

                    function formatLiteralPercent() {
                        return "%";
                    }

                    var locale$2;





                    defaultLocale$1({
                        dateTime: "%x, %X",
                        date: "%-m/%-d/%Y",
                        time: "%-I:%M:%S %p",
                        periods: ["AM", "PM"],
                        days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
                        shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
                        months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
                        shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
                    });

                    function defaultLocale$1(definition) {
                        locale$2 = formatLocale$1(definition);
                        exports.timeFormat = locale$2.format;
                        exports.timeParse = locale$2.parse;
                        exports.utcFormat = locale$2.utcFormat;
                        exports.utcParse = locale$2.utcParse;
                        return locale$2;
                    }

                    var isoSpecifier = "%Y-%m-%dT%H:%M:%S.%LZ";

                    function formatIsoNative(date) {
                        return date.toISOString();
                    }

                    var formatIso = Date.prototype.toISOString ?
                        formatIsoNative :
                        exports.utcFormat(isoSpecifier);

                    function parseIsoNative(string) {
                        var date = new Date(string);
                        return isNaN(date) ? null : date;
                    }

                    var parseIso = +new Date("2000-01-01T00:00:00.000Z") ?
                        parseIsoNative :
                        exports.utcParse(isoSpecifier);

                    var durationSecond = 1000;
                    var durationMinute = durationSecond * 60;
                    var durationHour = durationMinute * 60;
                    var durationDay = durationHour * 24;
                    var durationWeek = durationDay * 7;
                    var durationMonth = durationDay * 30;
                    var durationYear = durationDay * 365;

                    function date$1(t) {
                        return new Date(t);
                    }

                    function number$2(t) {
                        return t instanceof Date ? +t : +new Date(+t);
                    }

                    function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format) {
                        var scale = continuous(deinterpolateLinear, reinterpolate),
                            invert = scale.invert,
                            domain = scale.domain;

                        var formatMillisecond = format(".%L"),
                            formatSecond = format(":%S"),
                            formatMinute = format("%I:%M"),
                            formatHour = format("%I %p"),
                            formatDay = format("%a %d"),
                            formatWeek = format("%b %d"),
                            formatMonth = format("%B"),
                            formatYear = format("%Y");

                        var tickIntervals = [
                            [second$$1, 1, durationSecond],
                            [second$$1, 5, 5 * durationSecond],
                            [second$$1, 15, 15 * durationSecond],
                            [second$$1, 30, 30 * durationSecond],
                            [minute$$1, 1, durationMinute],
                            [minute$$1, 5, 5 * durationMinute],
                            [minute$$1, 15, 15 * durationMinute],
                            [minute$$1, 30, 30 * durationMinute],
                            [hour$$1, 1, durationHour],
                            [hour$$1, 3, 3 * durationHour],
                            [hour$$1, 6, 6 * durationHour],
                            [hour$$1, 12, 12 * durationHour],
                            [day$$1, 1, durationDay],
                            [day$$1, 2, 2 * durationDay],
                            [week, 1, durationWeek],
                            [month$$1, 1, durationMonth],
                            [month$$1, 3, 3 * durationMonth],
                            [year$$1, 1, durationYear]
                        ];

                        function tickFormat(date) {
                            return (second$$1(date) < date ? formatMillisecond :
                                minute$$1(date) < date ? formatSecond :
                                hour$$1(date) < date ? formatMinute :
                                day$$1(date) < date ? formatHour :
                                month$$1(date) < date ? (week(date) < date ? formatDay : formatWeek) :
                                year$$1(date) < date ? formatMonth :
                                formatYear)(date);
                        }

                        function tickInterval(interval, start, stop, step) {
                            if (interval == null) interval = 10;

                            // If a desired tick count is specified, pick a reasonable tick interval
                            // based on the extent of the domain and a rough estimate of tick size.
                            // Otherwise, assume interval is already a time interval and use it.
                            if (typeof interval === "number") {
                                var target = Math.abs(stop - start) / interval,
                                    i = bisector(function(i) { return i[2]; }).right(tickIntervals, target);
                                if (i === tickIntervals.length) {
                                    step = tickStep(start / durationYear, stop / durationYear, interval);
                                    interval = year$$1;
                                } else if (i) {
                                    i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];
                                    step = i[1];
                                    interval = i[0];
                                } else {
                                    step = tickStep(start, stop, interval);
                                    interval = millisecond$$1;
                                }
                            }

                            return step == null ? interval : interval.every(step);
                        }

                        scale.invert = function(y) {
                            return new Date(invert(y));
                        };

                        scale.domain = function(_) {
                            return arguments.length ? domain(map$3.call(_, number$2)) : domain().map(date$1);
                        };

                        scale.ticks = function(interval, step) {
                            var d = domain(),
                                t0 = d[0],
                                t1 = d[d.length - 1],
                                r = t1 < t0,
                                t;
                            if (r) t = t0, t0 = t1, t1 = t;
                            t = tickInterval(interval, t0, t1, step);
                            t = t ? t.range(t0, t1 + 1) : []; // inclusive stop
                            return r ? t.reverse() : t;
                        };

                        scale.tickFormat = function(count, specifier) {
                            return specifier == null ? tickFormat : format(specifier);
                        };

                        scale.nice = function(interval, step) {
                            var d = domain();
                            return (interval = tickInterval(interval, d[0], d[d.length - 1], step)) ?
                                domain(nice(d, interval)) :
                                scale;
                        };

                        scale.copy = function() {
                            return copy(scale, calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format));
                        };

                        return scale;
                    }

                    var time = function() {
                        return calendar(year, month, sunday, day, hour, minute, second, millisecond, exports.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]);
                    };

                    var utcTime = function() {
                        return calendar(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute, second, millisecond, exports.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]);
                    };

                    var colors = function(s) {
                        return s.match(/.{6}/g).map(function(x) {
                            return "#" + x;
                        });
                    };

                    var category10 = colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf");

                    var category20b = colors("393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6");

                    var category20c = colors("3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9");

                    var category20 = colors("1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5");

                    var cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));

                    var warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));

                    var cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8));

                    var rainbow = cubehelix();

                    var rainbow$1 = function(t) {
                        if (t < 0 || t > 1) t -= Math.floor(t);
                        var ts = Math.abs(t - 0.5);
                        rainbow.h = 360 * t - 100;
                        rainbow.s = 1.5 - 1.5 * ts;
                        rainbow.l = 0.8 - 0.9 * ts;
                        return rainbow + "";
                    };

                    function ramp(range) {
                        var n = range.length;
                        return function(t) {
                            return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
                        };
                    }

                    var viridis = ramp(colors("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"));

                    var magma = ramp(colors("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"));

                    var inferno = ramp(colors("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"));

                    var plasma = ramp(colors("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"));

                    function sequential(interpolator) {
                        var x0 = 0,
                            x1 = 1,
                            clamp = false;

                        function scale(x) {
                            var t = (x - x0) / (x1 - x0);
                            return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);
                        }

                        scale.domain = function(_) {
                            return arguments.length ? (x0 = +_[0], x1 = +_[1], scale) : [x0, x1];
                        };

                        scale.clamp = function(_) {
                            return arguments.length ? (clamp = !!_, scale) : clamp;
                        };

                        scale.interpolator = function(_) {
                            return arguments.length ? (interpolator = _, scale) : interpolator;
                        };

                        scale.copy = function() {
                            return sequential(interpolator).domain([x0, x1]).clamp(clamp);
                        };

                        return linearish(scale);
                    }

                    var constant$10 = function(x) {
                        return function constant() {
                            return x;
                        };
                    };

                    var epsilon$3 = 1e-12;
                    var pi$4 = Math.PI;
                    var halfPi$3 = pi$4 / 2;
                    var tau$4 = 2 * pi$4;

                    function arcInnerRadius(d) {
                        return d.innerRadius;
                    }

                    function arcOuterRadius(d) {
                        return d.outerRadius;
                    }

                    function arcStartAngle(d) {
                        return d.startAngle;
                    }

                    function arcEndAngle(d) {
                        return d.endAngle;
                    }

                    function arcPadAngle(d) {
                        return d && d.padAngle; // Note: optional!
                    }

                    function asin$1(x) {
                        return x >= 1 ? halfPi$3 : x <= -1 ? -halfPi$3 : Math.asin(x);
                    }

                    function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
                        var x10 = x1 - x0,
                            y10 = y1 - y0,
                            x32 = x3 - x2,
                            y32 = y3 - y2,
                            t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10);
                        return [x0 + t * x10, y0 + t * y10];
                    }

                    // Compute perpendicular offset line of length rc.
                    // http://mathworld.wolfram.com/Circle-LineIntersection.html
                    function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
                        var x01 = x0 - x1,
                            y01 = y0 - y1,
                            lo = (cw ? rc : -rc) / Math.sqrt(x01 * x01 + y01 * y01),
                            ox = lo * y01,
                            oy = -lo * x01,
                            x11 = x0 + ox,
                            y11 = y0 + oy,
                            x10 = x1 + ox,
                            y10 = y1 + oy,
                            x00 = (x11 + x10) / 2,
                            y00 = (y11 + y10) / 2,
                            dx = x10 - x11,
                            dy = y10 - y11,
                            d2 = dx * dx + dy * dy,
                            r = r1 - rc,
                            D = x11 * y10 - x10 * y11,
                            d = (dy < 0 ? -1 : 1) * Math.sqrt(Math.max(0, r * r * d2 - D * D)),
                            cx0 = (D * dy - dx * d) / d2,
                            cy0 = (-D * dx - dy * d) / d2,
                            cx1 = (D * dy + dx * d) / d2,
                            cy1 = (-D * dx + dy * d) / d2,
                            dx0 = cx0 - x00,
                            dy0 = cy0 - y00,
                            dx1 = cx1 - x00,
                            dy1 = cy1 - y00;

                        // Pick the closer of the two intersection points.
                        // TODO Is there a faster way to determine which intersection to use?
                        if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;

                        return {
                            cx: cx0,
                            cy: cy0,
                            x01: -ox,
                            y01: -oy,
                            x11: cx0 * (r1 / r - 1),
                            y11: cy0 * (r1 / r - 1)
                        };
                    }

                    var arc = function() {
                        var innerRadius = arcInnerRadius,
                            outerRadius = arcOuterRadius,
                            cornerRadius = constant$10(0),
                            padRadius = null,
                            startAngle = arcStartAngle,
                            endAngle = arcEndAngle,
                            padAngle = arcPadAngle,
                            context = null;

                        function arc() {
                            var buffer,
                                r,
                                r0 = +innerRadius.apply(this, arguments),
                                r1 = +outerRadius.apply(this, arguments),
                                a0 = startAngle.apply(this, arguments) - halfPi$3,
                                a1 = endAngle.apply(this, arguments) - halfPi$3,
                                da = Math.abs(a1 - a0),
                                cw = a1 > a0;

                            if (!context) context = buffer = path();

                            // Ensure that the outer radius is always larger than the inner radius.
                            if (r1 < r0) r = r1, r1 = r0, r0 = r;

                            // Is it a point?
                            if (!(r1 > epsilon$3)) context.moveTo(0, 0);

                            // Or is it a circle or annulus?
                            else if (da > tau$4 - epsilon$3) {
                                context.moveTo(r1 * Math.cos(a0), r1 * Math.sin(a0));
                                context.arc(0, 0, r1, a0, a1, !cw);
                                if (r0 > epsilon$3) {
                                    context.moveTo(r0 * Math.cos(a1), r0 * Math.sin(a1));
                                    context.arc(0, 0, r0, a1, a0, cw);
                                }
                            }

                            // Or is it a circular or annular sector?
                            else {
                                var a01 = a0,
                                    a11 = a1,
                                    a00 = a0,
                                    a10 = a1,
                                    da0 = da,
                                    da1 = da,
                                    ap = padAngle.apply(this, arguments) / 2,
                                    rp = (ap > epsilon$3) && (padRadius ? +padRadius.apply(this, arguments) : Math.sqrt(r0 * r0 + r1 * r1)),
                                    rc = Math.min(Math.abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
                                    rc0 = rc,
                                    rc1 = rc,
                                    t0,
                                    t1;

                                // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
                                if (rp > epsilon$3) {
                                    var p0 = asin$1(rp / r0 * Math.sin(ap)),
                                        p1 = asin$1(rp / r1 * Math.sin(ap));
                                    if ((da0 -= p0 * 2) > epsilon$3) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;
                                    else da0 = 0, a00 = a10 = (a0 + a1) / 2;
                                    if ((da1 -= p1 * 2) > epsilon$3) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;
                                    else da1 = 0, a01 = a11 = (a0 + a1) / 2;
                                }

                                var x01 = r1 * Math.cos(a01),
                                    y01 = r1 * Math.sin(a01),
                                    x10 = r0 * Math.cos(a10),
                                    y10 = r0 * Math.sin(a10);

                                // Apply rounded corners?
                                if (rc > epsilon$3) {
                                    var x11 = r1 * Math.cos(a11),
                                        y11 = r1 * Math.sin(a11),
                                        x00 = r0 * Math.cos(a00),
                                        y00 = r0 * Math.sin(a00);

                                    // Restrict the corner radius according to the sector angle.
                                    if (da < pi$4) {
                                        var oc = da0 > epsilon$3 ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10],
                                            ax = x01 - oc[0],
                                            ay = y01 - oc[1],
                                            bx = x11 - oc[0],
                                            by = y11 - oc[1],
                                            kc = 1 / Math.sin(Math.acos((ax * bx + ay * by) / (Math.sqrt(ax * ax + ay * ay) * Math.sqrt(bx * bx + by * by))) / 2),
                                            lc = Math.sqrt(oc[0] * oc[0] + oc[1] * oc[1]);
                                        rc0 = Math.min(rc, (r0 - lc) / (kc - 1));
                                        rc1 = Math.min(rc, (r1 - lc) / (kc + 1));
                                    }
                                }

                                // Is the sector collapsed to a line?
                                if (!(da1 > epsilon$3)) context.moveTo(x01, y01);

                                // Does the sector’s outer ring have rounded corners?
                                else if (rc1 > epsilon$3) {
                                    t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
                                    t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);

                                    context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);

                                    // Have the corners merged?
                                    if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw);

                                    // Otherwise, draw the two corners and the ring.
                                    else {
                                        context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw);
                                        context.arc(0, 0, r1, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
                                        context.arc(t1.cx, t1.cy, rc1, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw);
                                    }
                                }

                                // Or is the outer ring just a circular arc?
                                else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);

                                // Is there no inner ring, and it’s a circular sector?
                                // Or perhaps it’s an annular sector collapsed due to padding?
                                if (!(r0 > epsilon$3) || !(da0 > epsilon$3)) context.lineTo(x10, y10);

                                // Does the sector’s inner ring (or point) have rounded corners?
                                else if (rc0 > epsilon$3) {
                                    t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
                                    t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);

                                    context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);

                                    // Have the corners merged?
                                    if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw);

                                    // Otherwise, draw the two corners and the ring.
                                    else {
                                        context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw);
                                        context.arc(0, 0, r0, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), cw);
                                        context.arc(t1.cx, t1.cy, rc0, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw);
                                    }
                                }

                                // Or is the inner ring just a circular arc?
                                else context.arc(0, 0, r0, a10, a00, cw);
                            }

                            context.closePath();

                            if (buffer) return context = null, buffer + "" || null;
                        }

                        arc.centroid = function() {
                            var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
                                a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi$4 / 2;
                            return [Math.cos(a) * r, Math.sin(a) * r];
                        };

                        arc.innerRadius = function(_) {
                            return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : innerRadius;
                        };

                        arc.outerRadius = function(_) {
                            return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : outerRadius;
                        };

                        arc.cornerRadius = function(_) {
                            return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : cornerRadius;
                        };

                        arc.padRadius = function(_) {
                            return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), arc) : padRadius;
                        };

                        arc.startAngle = function(_) {
                            return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : startAngle;
                        };

                        arc.endAngle = function(_) {
                            return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : endAngle;
                        };

                        arc.padAngle = function(_) {
                            return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : padAngle;
                        };

                        arc.context = function(_) {
                            return arguments.length ? ((context = _ == null ? null : _), arc) : context;
                        };

                        return arc;
                    };

                    function Linear(context) {
                        this._context = context;
                    }

                    Linear.prototype = {
                        areaStart: function() {
                            this._line = 0;
                        },
                        areaEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._point = 0;
                        },
                        lineEnd: function() {
                            if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
                            this._line = 1 - this._line;
                        },
                        point: function(x, y) {
                            x = +x, y = +y;
                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);
                                    break;
                                case 1:
                                    this._point = 2; // proceed
                                default:
                                    this._context.lineTo(x, y);
                                    break;
                            }
                        }
                    };

                    var curveLinear = function(context) {
                        return new Linear(context);
                    };

                    function x$3(p) {
                        return p[0];
                    }

                    function y$3(p) {
                        return p[1];
                    }

                    var line = function() {
                        var x$$1 = x$3,
                            y$$1 = y$3,
                            defined = constant$10(true),
                            context = null,
                            curve = curveLinear,
                            output = null;

                        function line(data) {
                            var i,
                                n = data.length,
                                d,
                                defined0 = false,
                                buffer;

                            if (context == null) output = curve(buffer = path());

                            for (i = 0; i <= n; ++i) {
                                if (!(i < n && defined(d = data[i], i, data)) === defined0) {
                                    if (defined0 = !defined0) output.lineStart();
                                    else output.lineEnd();
                                }
                                if (defined0) output.point(+x$$1(d, i, data), +y$$1(d, i, data));
                            }

                            if (buffer) return output = null, buffer + "" || null;
                        }

                        line.x = function(_) {
                            return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$10(+_), line) : x$$1;
                        };

                        line.y = function(_) {
                            return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$10(+_), line) : y$$1;
                        };

                        line.defined = function(_) {
                            return arguments.length ? (defined = typeof _ === "function" ? _ : constant$10(!!_), line) : defined;
                        };

                        line.curve = function(_) {
                            return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;
                        };

                        line.context = function(_) {
                            return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;
                        };

                        return line;
                    };

                    var area$2 = function() {
                        var x0 = x$3,
                            x1 = null,
                            y0 = constant$10(0),
                            y1 = y$3,
                            defined = constant$10(true),
                            context = null,
                            curve = curveLinear,
                            output = null;

                        function area(data) {
                            var i,
                                j,
                                k,
                                n = data.length,
                                d,
                                defined0 = false,
                                buffer,
                                x0z = new Array(n),
                                y0z = new Array(n);

                            if (context == null) output = curve(buffer = path());

                            for (i = 0; i <= n; ++i) {
                                if (!(i < n && defined(d = data[i], i, data)) === defined0) {
                                    if (defined0 = !defined0) {
                                        j = i;
                                        output.areaStart();
                                        output.lineStart();
                                    } else {
                                        output.lineEnd();
                                        output.lineStart();
                                        for (k = i - 1; k >= j; --k) {
                                            output.point(x0z[k], y0z[k]);
                                        }
                                        output.lineEnd();
                                        output.areaEnd();
                                    }
                                }
                                if (defined0) {
                                    x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);
                                    output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);
                                }
                            }

                            if (buffer) return output = null, buffer + "" || null;
                        }

                        function arealine() {
                            return line().defined(defined).curve(curve).context(context);
                        }

                        area.x = function(_) {
                            return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$10(+_), x1 = null, area) : x0;
                        };

                        area.x0 = function(_) {
                            return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$10(+_), area) : x0;
                        };

                        area.x1 = function(_) {
                            return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), area) : x1;
                        };

                        area.y = function(_) {
                            return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$10(+_), y1 = null, area) : y0;
                        };

                        area.y0 = function(_) {
                            return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$10(+_), area) : y0;
                        };

                        area.y1 = function(_) {
                            return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), area) : y1;
                        };

                        area.lineX0 =
                            area.lineY0 = function() {
                                return arealine().x(x0).y(y0);
                            };

                        area.lineY1 = function() {
                            return arealine().x(x0).y(y1);
                        };

                        area.lineX1 = function() {
                            return arealine().x(x1).y(y0);
                        };

                        area.defined = function(_) {
                            return arguments.length ? (defined = typeof _ === "function" ? _ : constant$10(!!_), area) : defined;
                        };

                        area.curve = function(_) {
                            return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;
                        };

                        area.context = function(_) {
                            return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;
                        };

                        return area;
                    };

                    var descending$1 = function(a, b) {
                        return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
                    };

                    var identity$7 = function(d) {
                        return d;
                    };

                    var pie = function() {
                        var value = identity$7,
                            sortValues = descending$1,
                            sort = null,
                            startAngle = constant$10(0),
                            endAngle = constant$10(tau$4),
                            padAngle = constant$10(0);

                        function pie(data) {
                            var i,
                                n = data.length,
                                j,
                                k,
                                sum = 0,
                                index = new Array(n),
                                arcs = new Array(n),
                                a0 = +startAngle.apply(this, arguments),
                                da = Math.min(tau$4, Math.max(-tau$4, endAngle.apply(this, arguments) - a0)),
                                a1,
                                p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),
                                pa = p * (da < 0 ? -1 : 1),
                                v;

                            for (i = 0; i < n; ++i) {
                                if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {
                                    sum += v;
                                }
                            }

                            // Optionally sort the arcs by previously-computed values or by data.
                            if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });
                            else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });

                            // Compute the arcs! They are stored in the original data's order.
                            for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {
                                j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {
                                    data: data[j],
                                    index: i,
                                    value: v,
                                    startAngle: a0,
                                    endAngle: a1,
                                    padAngle: p
                                };
                            }

                            return arcs;
                        }

                        pie.value = function(_) {
                            return arguments.length ? (value = typeof _ === "function" ? _ : constant$10(+_), pie) : value;
                        };

                        pie.sortValues = function(_) {
                            return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;
                        };

                        pie.sort = function(_) {
                            return arguments.length ? (sort = _, sortValues = null, pie) : sort;
                        };

                        pie.startAngle = function(_) {
                            return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : startAngle;
                        };

                        pie.endAngle = function(_) {
                            return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : endAngle;
                        };

                        pie.padAngle = function(_) {
                            return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : padAngle;
                        };

                        return pie;
                    };

                    var curveRadialLinear = curveRadial(curveLinear);

                    function Radial(curve) {
                        this._curve = curve;
                    }

                    Radial.prototype = {
                        areaStart: function() {
                            this._curve.areaStart();
                        },
                        areaEnd: function() {
                            this._curve.areaEnd();
                        },
                        lineStart: function() {
                            this._curve.lineStart();
                        },
                        lineEnd: function() {
                            this._curve.lineEnd();
                        },
                        point: function(a, r) {
                            this._curve.point(r * Math.sin(a), r * -Math.cos(a));
                        }
                    };

                    function curveRadial(curve) {

                        function radial(context) {
                            return new Radial(curve(context));
                        }

                        radial._curve = curve;

                        return radial;
                    }

                    function radialLine(l) {
                        var c = l.curve;

                        l.angle = l.x, delete l.x;
                        l.radius = l.y, delete l.y;

                        l.curve = function(_) {
                            return arguments.length ? c(curveRadial(_)) : c()._curve;
                        };

                        return l;
                    }

                    var radialLine$1 = function() {
                        return radialLine(line().curve(curveRadialLinear));
                    };

                    var radialArea = function() {
                        var a = area$2().curve(curveRadialLinear),
                            c = a.curve,
                            x0 = a.lineX0,
                            x1 = a.lineX1,
                            y0 = a.lineY0,
                            y1 = a.lineY1;

                        a.angle = a.x, delete a.x;
                        a.startAngle = a.x0, delete a.x0;
                        a.endAngle = a.x1, delete a.x1;
                        a.radius = a.y, delete a.y;
                        a.innerRadius = a.y0, delete a.y0;
                        a.outerRadius = a.y1, delete a.y1;
                        a.lineStartAngle = function() { return radialLine(x0()); }, delete a.lineX0;
                        a.lineEndAngle = function() { return radialLine(x1()); }, delete a.lineX1;
                        a.lineInnerRadius = function() { return radialLine(y0()); }, delete a.lineY0;
                        a.lineOuterRadius = function() { return radialLine(y1()); }, delete a.lineY1;

                        a.curve = function(_) {
                            return arguments.length ? c(curveRadial(_)) : c()._curve;
                        };

                        return a;
                    };

                    var circle$2 = {
                        draw: function(context, size) {
                            var r = Math.sqrt(size / pi$4);
                            context.moveTo(r, 0);
                            context.arc(0, 0, r, 0, tau$4);
                        }
                    };

                    var cross$1 = {
                        draw: function(context, size) {
                            var r = Math.sqrt(size / 5) / 2;
                            context.moveTo(-3 * r, -r);
                            context.lineTo(-r, -r);
                            context.lineTo(-r, -3 * r);
                            context.lineTo(r, -3 * r);
                            context.lineTo(r, -r);
                            context.lineTo(3 * r, -r);
                            context.lineTo(3 * r, r);
                            context.lineTo(r, r);
                            context.lineTo(r, 3 * r);
                            context.lineTo(-r, 3 * r);
                            context.lineTo(-r, r);
                            context.lineTo(-3 * r, r);
                            context.closePath();
                        }
                    };

                    var tan30 = Math.sqrt(1 / 3);
                    var tan30_2 = tan30 * 2;

                    var diamond = {
                        draw: function(context, size) {
                            var y = Math.sqrt(size / tan30_2),
                                x = y * tan30;
                            context.moveTo(0, -y);
                            context.lineTo(x, 0);
                            context.lineTo(0, y);
                            context.lineTo(-x, 0);
                            context.closePath();
                        }
                    };

                    var ka = 0.89081309152928522810;
                    var kr = Math.sin(pi$4 / 10) / Math.sin(7 * pi$4 / 10);
                    var kx = Math.sin(tau$4 / 10) * kr;
                    var ky = -Math.cos(tau$4 / 10) * kr;

                    var star = {
                        draw: function(context, size) {
                            var r = Math.sqrt(size * ka),
                                x = kx * r,
                                y = ky * r;
                            context.moveTo(0, -r);
                            context.lineTo(x, y);
                            for (var i = 1; i < 5; ++i) {
                                var a = tau$4 * i / 5,
                                    c = Math.cos(a),
                                    s = Math.sin(a);
                                context.lineTo(s * r, -c * r);
                                context.lineTo(c * x - s * y, s * x + c * y);
                            }
                            context.closePath();
                        }
                    };

                    var square = {
                        draw: function(context, size) {
                            var w = Math.sqrt(size),
                                x = -w / 2;
                            context.rect(x, x, w, w);
                        }
                    };

                    var sqrt3 = Math.sqrt(3);

                    var triangle = {
                        draw: function(context, size) {
                            var y = -Math.sqrt(size / (sqrt3 * 3));
                            context.moveTo(0, y * 2);
                            context.lineTo(-sqrt3 * y, -y);
                            context.lineTo(sqrt3 * y, -y);
                            context.closePath();
                        }
                    };

                    var c = -0.5;
                    var s = Math.sqrt(3) / 2;
                    var k = 1 / Math.sqrt(12);
                    var a = (k / 2 + 1) * 3;

                    var wye = {
                        draw: function(context, size) {
                            var r = Math.sqrt(size / a),
                                x0 = r / 2,
                                y0 = r * k,
                                x1 = x0,
                                y1 = r * k + r,
                                x2 = -x1,
                                y2 = y1;
                            context.moveTo(x0, y0);
                            context.lineTo(x1, y1);
                            context.lineTo(x2, y2);
                            context.lineTo(c * x0 - s * y0, s * x0 + c * y0);
                            context.lineTo(c * x1 - s * y1, s * x1 + c * y1);
                            context.lineTo(c * x2 - s * y2, s * x2 + c * y2);
                            context.lineTo(c * x0 + s * y0, c * y0 - s * x0);
                            context.lineTo(c * x1 + s * y1, c * y1 - s * x1);
                            context.lineTo(c * x2 + s * y2, c * y2 - s * x2);
                            context.closePath();
                        }
                    };

                    var symbols = [
                        circle$2,
                        cross$1,
                        diamond,
                        square,
                        star,
                        triangle,
                        wye
                    ];

                    var symbol = function() {
                        var type = constant$10(circle$2),
                            size = constant$10(64),
                            context = null;

                        function symbol() {
                            var buffer;
                            if (!context) context = buffer = path();
                            type.apply(this, arguments).draw(context, +size.apply(this, arguments));
                            if (buffer) return context = null, buffer + "" || null;
                        }

                        symbol.type = function(_) {
                            return arguments.length ? (type = typeof _ === "function" ? _ : constant$10(_), symbol) : type;
                        };

                        symbol.size = function(_) {
                            return arguments.length ? (size = typeof _ === "function" ? _ : constant$10(+_), symbol) : size;
                        };

                        symbol.context = function(_) {
                            return arguments.length ? (context = _ == null ? null : _, symbol) : context;
                        };

                        return symbol;
                    };

                    var noop$2 = function() {};

                    function point$2(that, x, y) {
                        that._context.bezierCurveTo(
                            (2 * that._x0 + that._x1) / 3,
                            (2 * that._y0 + that._y1) / 3,
                            (that._x0 + 2 * that._x1) / 3,
                            (that._y0 + 2 * that._y1) / 3,
                            (that._x0 + 4 * that._x1 + x) / 6,
                            (that._y0 + 4 * that._y1 + y) / 6
                        );
                    }

                    function Basis(context) {
                        this._context = context;
                    }

                    Basis.prototype = {
                        areaStart: function() {
                            this._line = 0;
                        },
                        areaEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._x0 = this._x1 =
                                this._y0 = this._y1 = NaN;
                            this._point = 0;
                        },
                        lineEnd: function() {
                            switch (this._point) {
                                case 3:
                                    point$2(this, this._x1, this._y1); // proceed
                                case 2:
                                    this._context.lineTo(this._x1, this._y1);
                                    break;
                            }
                            if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
                            this._line = 1 - this._line;
                        },
                        point: function(x, y) {
                            x = +x, y = +y;
                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);
                                    break;
                                case 1:
                                    this._point = 2;
                                    break;
                                case 2:
                                    this._point = 3;
                                    this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed
                                default:
                                    point$2(this, x, y);
                                    break;
                            }
                            this._x0 = this._x1, this._x1 = x;
                            this._y0 = this._y1, this._y1 = y;
                        }
                    };

                    var basis$2 = function(context) {
                        return new Basis(context);
                    };

                    function BasisClosed(context) {
                        this._context = context;
                    }

                    BasisClosed.prototype = {
                        areaStart: noop$2,
                        areaEnd: noop$2,
                        lineStart: function() {
                            this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =
                                this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
                            this._point = 0;
                        },
                        lineEnd: function() {
                            switch (this._point) {
                                case 1:
                                    {
                                        this._context.moveTo(this._x2, this._y2);
                                        this._context.closePath();
                                        break;
                                    }
                                case 2:
                                    {
                                        this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);
                                        this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);
                                        this._context.closePath();
                                        break;
                                    }
                                case 3:
                                    {
                                        this.point(this._x2, this._y2);
                                        this.point(this._x3, this._y3);
                                        this.point(this._x4, this._y4);
                                        break;
                                    }
                            }
                        },
                        point: function(x, y) {
                            x = +x, y = +y;
                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    this._x2 = x, this._y2 = y;
                                    break;
                                case 1:
                                    this._point = 2;
                                    this._x3 = x, this._y3 = y;
                                    break;
                                case 2:
                                    this._point = 3;
                                    this._x4 = x, this._y4 = y;
                                    this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6);
                                    break;
                                default:
                                    point$2(this, x, y);
                                    break;
                            }
                            this._x0 = this._x1, this._x1 = x;
                            this._y0 = this._y1, this._y1 = y;
                        }
                    };

                    var basisClosed$1 = function(context) {
                        return new BasisClosed(context);
                    };

                    function BasisOpen(context) {
                        this._context = context;
                    }

                    BasisOpen.prototype = {
                        areaStart: function() {
                            this._line = 0;
                        },
                        areaEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._x0 = this._x1 =
                                this._y0 = this._y1 = NaN;
                            this._point = 0;
                        },
                        lineEnd: function() {
                            if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
                            this._line = 1 - this._line;
                        },
                        point: function(x, y) {
                            x = +x, y = +y;
                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    break;
                                case 1:
                                    this._point = 2;
                                    break;
                                case 2:
                                    this._point = 3;
                                    var x0 = (this._x0 + 4 * this._x1 + x) / 6,
                                        y0 = (this._y0 + 4 * this._y1 + y) / 6;
                                    this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0);
                                    break;
                                case 3:
                                    this._point = 4; // proceed
                                default:
                                    point$2(this, x, y);
                                    break;
                            }
                            this._x0 = this._x1, this._x1 = x;
                            this._y0 = this._y1, this._y1 = y;
                        }
                    };

                    var basisOpen = function(context) {
                        return new BasisOpen(context);
                    };

                    function Bundle(context, beta) {
                        this._basis = new Basis(context);
                        this._beta = beta;
                    }

                    Bundle.prototype = {
                        lineStart: function() {
                            this._x = [];
                            this._y = [];
                            this._basis.lineStart();
                        },
                        lineEnd: function() {
                            var x = this._x,
                                y = this._y,
                                j = x.length - 1;

                            if (j > 0) {
                                var x0 = x[0],
                                    y0 = y[0],
                                    dx = x[j] - x0,
                                    dy = y[j] - y0,
                                    i = -1,
                                    t;

                                while (++i <= j) {
                                    t = i / j;
                                    this._basis.point(
                                        this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),
                                        this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)
                                    );
                                }
                            }

                            this._x = this._y = null;
                            this._basis.lineEnd();
                        },
                        point: function(x, y) {
                            this._x.push(+x);
                            this._y.push(+y);
                        }
                    };

                    var bundle = ((function custom(beta) {

                        function bundle(context) {
                            return beta === 1 ? new Basis(context) : new Bundle(context, beta);
                        }

                        bundle.beta = function(beta) {
                            return custom(+beta);
                        };

                        return bundle;
                    }))(0.85);

                    function point$3(that, x, y) {
                        that._context.bezierCurveTo(
                            that._x1 + that._k * (that._x2 - that._x0),
                            that._y1 + that._k * (that._y2 - that._y0),
                            that._x2 + that._k * (that._x1 - x),
                            that._y2 + that._k * (that._y1 - y),
                            that._x2,
                            that._y2
                        );
                    }

                    function Cardinal(context, tension) {
                        this._context = context;
                        this._k = (1 - tension) / 6;
                    }

                    Cardinal.prototype = {
                        areaStart: function() {
                            this._line = 0;
                        },
                        areaEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._x0 = this._x1 = this._x2 =
                                this._y0 = this._y1 = this._y2 = NaN;
                            this._point = 0;
                        },
                        lineEnd: function() {
                            switch (this._point) {
                                case 2:
                                    this._context.lineTo(this._x2, this._y2);
                                    break;
                                case 3:
                                    point$3(this, this._x1, this._y1);
                                    break;
                            }
                            if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
                            this._line = 1 - this._line;
                        },
                        point: function(x, y) {
                            x = +x, y = +y;
                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);
                                    break;
                                case 1:
                                    this._point = 2;
                                    this._x1 = x, this._y1 = y;
                                    break;
                                case 2:
                                    this._point = 3; // proceed
                                default:
                                    point$3(this, x, y);
                                    break;
                            }
                            this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
                            this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
                        }
                    };

                    var cardinal = ((function custom(tension) {

                        function cardinal(context) {
                            return new Cardinal(context, tension);
                        }

                        cardinal.tension = function(tension) {
                            return custom(+tension);
                        };

                        return cardinal;
                    }))(0);

                    function CardinalClosed(context, tension) {
                        this._context = context;
                        this._k = (1 - tension) / 6;
                    }

                    CardinalClosed.prototype = {
                        areaStart: noop$2,
                        areaEnd: noop$2,
                        lineStart: function() {
                            this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
                                this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
                            this._point = 0;
                        },
                        lineEnd: function() {
                            switch (this._point) {
                                case 1:
                                    {
                                        this._context.moveTo(this._x3, this._y3);
                                        this._context.closePath();
                                        break;
                                    }
                                case 2:
                                    {
                                        this._context.lineTo(this._x3, this._y3);
                                        this._context.closePath();
                                        break;
                                    }
                                case 3:
                                    {
                                        this.point(this._x3, this._y3);
                                        this.point(this._x4, this._y4);
                                        this.point(this._x5, this._y5);
                                        break;
                                    }
                            }
                        },
                        point: function(x, y) {
                            x = +x, y = +y;
                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    this._x3 = x, this._y3 = y;
                                    break;
                                case 1:
                                    this._point = 2;
                                    this._context.moveTo(this._x4 = x, this._y4 = y);
                                    break;
                                case 2:
                                    this._point = 3;
                                    this._x5 = x, this._y5 = y;
                                    break;
                                default:
                                    point$3(this, x, y);
                                    break;
                            }
                            this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
                            this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
                        }
                    };

                    var cardinalClosed = ((function custom(tension) {

                        function cardinal(context) {
                            return new CardinalClosed(context, tension);
                        }

                        cardinal.tension = function(tension) {
                            return custom(+tension);
                        };

                        return cardinal;
                    }))(0);

                    function CardinalOpen(context, tension) {
                        this._context = context;
                        this._k = (1 - tension) / 6;
                    }

                    CardinalOpen.prototype = {
                        areaStart: function() {
                            this._line = 0;
                        },
                        areaEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._x0 = this._x1 = this._x2 =
                                this._y0 = this._y1 = this._y2 = NaN;
                            this._point = 0;
                        },
                        lineEnd: function() {
                            if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
                            this._line = 1 - this._line;
                        },
                        point: function(x, y) {
                            x = +x, y = +y;
                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    break;
                                case 1:
                                    this._point = 2;
                                    break;
                                case 2:
                                    this._point = 3;
                                    this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2);
                                    break;
                                case 3:
                                    this._point = 4; // proceed
                                default:
                                    point$3(this, x, y);
                                    break;
                            }
                            this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
                            this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
                        }
                    };

                    var cardinalOpen = ((function custom(tension) {

                        function cardinal(context) {
                            return new CardinalOpen(context, tension);
                        }

                        cardinal.tension = function(tension) {
                            return custom(+tension);
                        };

                        return cardinal;
                    }))(0);

                    function point$4(that, x, y) {
                        var x1 = that._x1,
                            y1 = that._y1,
                            x2 = that._x2,
                            y2 = that._y2;

                        if (that._l01_a > epsilon$3) {
                            var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,
                                n = 3 * that._l01_a * (that._l01_a + that._l12_a);
                            x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;
                            y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;
                        }

                        if (that._l23_a > epsilon$3) {
                            var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,
                                m = 3 * that._l23_a * (that._l23_a + that._l12_a);
                            x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;
                            y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;
                        }

                        that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);
                    }

                    function CatmullRom(context, alpha) {
                        this._context = context;
                        this._alpha = alpha;
                    }

                    CatmullRom.prototype = {
                        areaStart: function() {
                            this._line = 0;
                        },
                        areaEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._x0 = this._x1 = this._x2 =
                                this._y0 = this._y1 = this._y2 = NaN;
                            this._l01_a = this._l12_a = this._l23_a =
                                this._l01_2a = this._l12_2a = this._l23_2a =
                                this._point = 0;
                        },
                        lineEnd: function() {
                            switch (this._point) {
                                case 2:
                                    this._context.lineTo(this._x2, this._y2);
                                    break;
                                case 3:
                                    this.point(this._x2, this._y2);
                                    break;
                            }
                            if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
                            this._line = 1 - this._line;
                        },
                        point: function(x, y) {
                            x = +x, y = +y;

                            if (this._point) {
                                var x23 = this._x2 - x,
                                    y23 = this._y2 - y;
                                this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
                            }

                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);
                                    break;
                                case 1:
                                    this._point = 2;
                                    break;
                                case 2:
                                    this._point = 3; // proceed
                                default:
                                    point$4(this, x, y);
                                    break;
                            }

                            this._l01_a = this._l12_a, this._l12_a = this._l23_a;
                            this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
                            this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
                            this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
                        }
                    };

                    var catmullRom = ((function custom(alpha) {

                        function catmullRom(context) {
                            return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);
                        }

                        catmullRom.alpha = function(alpha) {
                            return custom(+alpha);
                        };

                        return catmullRom;
                    }))(0.5);

                    function CatmullRomClosed(context, alpha) {
                        this._context = context;
                        this._alpha = alpha;
                    }

                    CatmullRomClosed.prototype = {
                        areaStart: noop$2,
                        areaEnd: noop$2,
                        lineStart: function() {
                            this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
                                this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
                            this._l01_a = this._l12_a = this._l23_a =
                                this._l01_2a = this._l12_2a = this._l23_2a =
                                this._point = 0;
                        },
                        lineEnd: function() {
                            switch (this._point) {
                                case 1:
                                    {
                                        this._context.moveTo(this._x3, this._y3);
                                        this._context.closePath();
                                        break;
                                    }
                                case 2:
                                    {
                                        this._context.lineTo(this._x3, this._y3);
                                        this._context.closePath();
                                        break;
                                    }
                                case 3:
                                    {
                                        this.point(this._x3, this._y3);
                                        this.point(this._x4, this._y4);
                                        this.point(this._x5, this._y5);
                                        break;
                                    }
                            }
                        },
                        point: function(x, y) {
                            x = +x, y = +y;

                            if (this._point) {
                                var x23 = this._x2 - x,
                                    y23 = this._y2 - y;
                                this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
                            }

                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    this._x3 = x, this._y3 = y;
                                    break;
                                case 1:
                                    this._point = 2;
                                    this._context.moveTo(this._x4 = x, this._y4 = y);
                                    break;
                                case 2:
                                    this._point = 3;
                                    this._x5 = x, this._y5 = y;
                                    break;
                                default:
                                    point$4(this, x, y);
                                    break;
                            }

                            this._l01_a = this._l12_a, this._l12_a = this._l23_a;
                            this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
                            this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
                            this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
                        }
                    };

                    var catmullRomClosed = ((function custom(alpha) {

                        function catmullRom(context) {
                            return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);
                        }

                        catmullRom.alpha = function(alpha) {
                            return custom(+alpha);
                        };

                        return catmullRom;
                    }))(0.5);

                    function CatmullRomOpen(context, alpha) {
                        this._context = context;
                        this._alpha = alpha;
                    }

                    CatmullRomOpen.prototype = {
                        areaStart: function() {
                            this._line = 0;
                        },
                        areaEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._x0 = this._x1 = this._x2 =
                                this._y0 = this._y1 = this._y2 = NaN;
                            this._l01_a = this._l12_a = this._l23_a =
                                this._l01_2a = this._l12_2a = this._l23_2a =
                                this._point = 0;
                        },
                        lineEnd: function() {
                            if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
                            this._line = 1 - this._line;
                        },
                        point: function(x, y) {
                            x = +x, y = +y;

                            if (this._point) {
                                var x23 = this._x2 - x,
                                    y23 = this._y2 - y;
                                this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
                            }

                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    break;
                                case 1:
                                    this._point = 2;
                                    break;
                                case 2:
                                    this._point = 3;
                                    this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2);
                                    break;
                                case 3:
                                    this._point = 4; // proceed
                                default:
                                    point$4(this, x, y);
                                    break;
                            }

                            this._l01_a = this._l12_a, this._l12_a = this._l23_a;
                            this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
                            this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
                            this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
                        }
                    };

                    var catmullRomOpen = ((function custom(alpha) {

                        function catmullRom(context) {
                            return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);
                        }

                        catmullRom.alpha = function(alpha) {
                            return custom(+alpha);
                        };

                        return catmullRom;
                    }))(0.5);

                    function LinearClosed(context) {
                        this._context = context;
                    }

                    LinearClosed.prototype = {
                        areaStart: noop$2,
                        areaEnd: noop$2,
                        lineStart: function() {
                            this._point = 0;
                        },
                        lineEnd: function() {
                            if (this._point) this._context.closePath();
                        },
                        point: function(x, y) {
                            x = +x, y = +y;
                            if (this._point) this._context.lineTo(x, y);
                            else this._point = 1, this._context.moveTo(x, y);
                        }
                    };

                    var linearClosed = function(context) {
                        return new LinearClosed(context);
                    };

                    function sign$1(x) {
                        return x < 0 ? -1 : 1;
                    }

                    // Calculate the slopes of the tangents (Hermite-type interpolation) based on
                    // the following paper: Steffen, M. 1990. A Simple Method for Monotonic
                    // Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.
                    // NOV(II), P. 443, 1990.
                    function slope3(that, x2, y2) {
                        var h0 = that._x1 - that._x0,
                            h1 = x2 - that._x1,
                            s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),
                            s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),
                            p = (s0 * h1 + s1 * h0) / (h0 + h1);
                        return (sign$1(s0) + sign$1(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;
                    }

                    // Calculate a one-sided slope.
                    function slope2(that, t) {
                        var h = that._x1 - that._x0;
                        return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;
                    }

                    // According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations
                    // "you can express cubic Hermite interpolation in terms of cubic Bézier curves
                    // with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1".
                    function point$5(that, t0, t1) {
                        var x0 = that._x0,
                            y0 = that._y0,
                            x1 = that._x1,
                            y1 = that._y1,
                            dx = (x1 - x0) / 3;
                        that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);
                    }

                    function MonotoneX(context) {
                        this._context = context;
                    }

                    MonotoneX.prototype = {
                        areaStart: function() {
                            this._line = 0;
                        },
                        areaEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._x0 = this._x1 =
                                this._y0 = this._y1 =
                                this._t0 = NaN;
                            this._point = 0;
                        },
                        lineEnd: function() {
                            switch (this._point) {
                                case 2:
                                    this._context.lineTo(this._x1, this._y1);
                                    break;
                                case 3:
                                    point$5(this, this._t0, slope2(this, this._t0));
                                    break;
                            }
                            if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
                            this._line = 1 - this._line;
                        },
                        point: function(x, y) {
                            var t1 = NaN;

                            x = +x, y = +y;
                            if (x === this._x1 && y === this._y1) return; // Ignore coincident points.
                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);
                                    break;
                                case 1:
                                    this._point = 2;
                                    break;
                                case 2:
                                    this._point = 3;
                                    point$5(this, slope2(this, t1 = slope3(this, x, y)), t1);
                                    break;
                                default:
                                    point$5(this, this._t0, t1 = slope3(this, x, y));
                                    break;
                            }

                            this._x0 = this._x1, this._x1 = x;
                            this._y0 = this._y1, this._y1 = y;
                            this._t0 = t1;
                        }
                    };

                    function MonotoneY(context) {
                        this._context = new ReflectContext(context);
                    }

                    (MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {
                        MonotoneX.prototype.point.call(this, y, x);
                    };

                    function ReflectContext(context) {
                        this._context = context;
                    }

                    ReflectContext.prototype = {
                        moveTo: function(x, y) { this._context.moveTo(y, x); },
                        closePath: function() { this._context.closePath(); },
                        lineTo: function(x, y) { this._context.lineTo(y, x); },
                        bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }
                    };

                    function monotoneX(context) {
                        return new MonotoneX(context);
                    }

                    function monotoneY(context) {
                        return new MonotoneY(context);
                    }

                    function Natural(context) {
                        this._context = context;
                    }

                    Natural.prototype = {
                        areaStart: function() {
                            this._line = 0;
                        },
                        areaEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._x = [];
                            this._y = [];
                        },
                        lineEnd: function() {
                            var x = this._x,
                                y = this._y,
                                n = x.length;

                            if (n) {
                                this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);
                                if (n === 2) {
                                    this._context.lineTo(x[1], y[1]);
                                } else {
                                    var px = controlPoints(x),
                                        py = controlPoints(y);
                                    for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {
                                        this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);
                                    }
                                }
                            }

                            if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();
                            this._line = 1 - this._line;
                            this._x = this._y = null;
                        },
                        point: function(x, y) {
                            this._x.push(+x);
                            this._y.push(+y);
                        }
                    };

                    // See https://www.particleincell.com/2012/bezier-splines/ for derivation.
                    function controlPoints(x) {
                        var i,
                            n = x.length - 1,
                            m,
                            a = new Array(n),
                            b = new Array(n),
                            r = new Array(n);
                        a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];
                        for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];
                        a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];
                        for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];
                        a[n - 1] = r[n - 1] / b[n - 1];
                        for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];
                        b[n - 1] = (x[n] + a[n - 1]) / 2;
                        for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];
                        return [a, b];
                    }

                    var natural = function(context) {
                        return new Natural(context);
                    };

                    function Step(context, t) {
                        this._context = context;
                        this._t = t;
                    }

                    Step.prototype = {
                        areaStart: function() {
                            this._line = 0;
                        },
                        areaEnd: function() {
                            this._line = NaN;
                        },
                        lineStart: function() {
                            this._x = this._y = NaN;
                            this._point = 0;
                        },
                        lineEnd: function() {
                            if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);
                            if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
                            if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;
                        },
                        point: function(x, y) {
                            x = +x, y = +y;
                            switch (this._point) {
                                case 0:
                                    this._point = 1;
                                    this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y);
                                    break;
                                case 1:
                                    this._point = 2; // proceed
                                default:
                                    {
                                        if (this._t <= 0) {
                                            this._context.lineTo(this._x, y);
                                            this._context.lineTo(x, y);
                                        } else {
                                            var x1 = this._x * (1 - this._t) + x * this._t;
                                            this._context.lineTo(x1, this._y);
                                            this._context.lineTo(x1, y);
                                        }
                                        break;
                                    }
                            }
                            this._x = x, this._y = y;
                        }
                    };

                    var step = function(context) {
                        return new Step(context, 0.5);
                    };

                    function stepBefore(context) {
                        return new Step(context, 0);
                    }

                    function stepAfter(context) {
                        return new Step(context, 1);
                    }

                    var slice$5 = Array.prototype.slice;

                    var none$1 = function(series, order) {
                        if (!((n = series.length) > 1)) return;
                        for (var i = 1, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {
                            s0 = s1, s1 = series[order[i]];
                            for (var j = 0; j < m; ++j) {
                                s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];
                            }
                        }
                    };

                    var none$2 = function(series) {
                        var n = series.length,
                            o = new Array(n);
                        while (--n >= 0) o[n] = n;
                        return o;
                    };

                    function stackValue(d, key) {
                        return d[key];
                    }

                    var stack = function() {
                        var keys = constant$10([]),
                            order = none$2,
                            offset = none$1,
                            value = stackValue;

                        function stack(data) {
                            var kz = keys.apply(this, arguments),
                                i,
                                m = data.length,
                                n = kz.length,
                                sz = new Array(n),
                                oz;

                            for (i = 0; i < n; ++i) {
                                for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {
                                    si[j] = sij = [0, +value(data[j], ki, j, data)];
                                    sij.data = data[j];
                                }
                                si.key = ki;
                            }

                            for (i = 0, oz = order(sz); i < n; ++i) {
                                sz[oz[i]].index = i;
                            }

                            offset(sz, oz);
                            return sz;
                        }

                        stack.keys = function(_) {
                            return arguments.length ? (keys = typeof _ === "function" ? _ : constant$10(slice$5.call(_)), stack) : keys;
                        };

                        stack.value = function(_) {
                            return arguments.length ? (value = typeof _ === "function" ? _ : constant$10(+_), stack) : value;
                        };

                        stack.order = function(_) {
                            return arguments.length ? (order = _ == null ? none$2 : typeof _ === "function" ? _ : constant$10(slice$5.call(_)), stack) : order;
                        };

                        stack.offset = function(_) {
                            return arguments.length ? (offset = _ == null ? none$1 : _, stack) : offset;
                        };

                        return stack;
                    };

                    var expand = function(series, order) {
                        if (!((n = series.length) > 0)) return;
                        for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {
                            for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;
                            if (y)
                                for (i = 0; i < n; ++i) series[i][j][1] /= y;
                        }
                        none$1(series, order);
                    };

                    var silhouette = function(series, order) {
                        if (!((n = series.length) > 0)) return;
                        for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {
                            for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;
                            s0[j][1] += s0[j][0] = -y / 2;
                        }
                        none$1(series, order);
                    };

                    var wiggle = function(series, order) {
                        if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;
                        for (var y = 0, j = 1, s0, m, n; j < m; ++j) {
                            for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {
                                var si = series[order[i]],
                                    sij0 = si[j][1] || 0,
                                    sij1 = si[j - 1][1] || 0,
                                    s3 = (sij0 - sij1) / 2;
                                for (var k = 0; k < i; ++k) {
                                    var sk = series[order[k]],
                                        skj0 = sk[j][1] || 0,
                                        skj1 = sk[j - 1][1] || 0;
                                    s3 += skj0 - skj1;
                                }
                                s1 += sij0, s2 += s3 * sij0;
                            }
                            s0[j - 1][1] += s0[j - 1][0] = y;
                            if (s1) y -= s2 / s1;
                        }
                        s0[j - 1][1] += s0[j - 1][0] = y;
                        none$1(series, order);
                    };

                    var ascending$2 = function(series) {
                        var sums = series.map(sum$2);
                        return none$2(series).sort(function(a, b) { return sums[a] - sums[b]; });
                    };

                    function sum$2(series) {
                        var s = 0,
                            i = -1,
                            n = series.length,
                            v;
                        while (++i < n)
                            if (v = +series[i][1]) s += v;
                        return s;
                    }

                    var descending$2 = function(series) {
                        return ascending$2(series).reverse();
                    };

                    var insideOut = function(series) {
                        var n = series.length,
                            i,
                            j,
                            sums = series.map(sum$2),
                            order = none$2(series).sort(function(a, b) { return sums[b] - sums[a]; }),
                            top = 0,
                            bottom = 0,
                            tops = [],
                            bottoms = [];

                        for (i = 0; i < n; ++i) {
                            j = order[i];
                            if (top < bottom) {
                                top += sums[j];
                                tops.push(j);
                            } else {
                                bottom += sums[j];
                                bottoms.push(j);
                            }
                        }

                        return bottoms.reverse().concat(tops);
                    };

                    var reverse = function(series) {
                        return none$2(series).reverse();
                    };

                    var constant$11 = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    function x$4(d) {
                        return d[0];
                    }

                    function y$4(d) {
                        return d[1];
                    }

                    function RedBlackTree() {
                        this._ = null; // root node
                    }

                    function RedBlackNode(node) {
                        node.U = // parent node
                            node.C = // color - true for red, false for black
                            node.L = // left node
                            node.R = // right node
                            node.P = // previous node
                            node.N = null; // next node
                    }

                    RedBlackTree.prototype = {
                        constructor: RedBlackTree,

                        insert: function(after, node) {
                            var parent, grandpa, uncle;

                            if (after) {
                                node.P = after;
                                node.N = after.N;
                                if (after.N) after.N.P = node;
                                after.N = node;
                                if (after.R) {
                                    after = after.R;
                                    while (after.L) after = after.L;
                                    after.L = node;
                                } else {
                                    after.R = node;
                                }
                                parent = after;
                            } else if (this._) {
                                after = RedBlackFirst(this._);
                                node.P = null;
                                node.N = after;
                                after.P = after.L = node;
                                parent = after;
                            } else {
                                node.P = node.N = null;
                                this._ = node;
                                parent = null;
                            }
                            node.L = node.R = null;
                            node.U = parent;
                            node.C = true;

                            after = node;
                            while (parent && parent.C) {
                                grandpa = parent.U;
                                if (parent === grandpa.L) {
                                    uncle = grandpa.R;
                                    if (uncle && uncle.C) {
                                        parent.C = uncle.C = false;
                                        grandpa.C = true;
                                        after = grandpa;
                                    } else {
                                        if (after === parent.R) {
                                            RedBlackRotateLeft(this, parent);
                                            after = parent;
                                            parent = after.U;
                                        }
                                        parent.C = false;
                                        grandpa.C = true;
                                        RedBlackRotateRight(this, grandpa);
                                    }
                                } else {
                                    uncle = grandpa.L;
                                    if (uncle && uncle.C) {
                                        parent.C = uncle.C = false;
                                        grandpa.C = true;
                                        after = grandpa;
                                    } else {
                                        if (after === parent.L) {
                                            RedBlackRotateRight(this, parent);
                                            after = parent;
                                            parent = after.U;
                                        }
                                        parent.C = false;
                                        grandpa.C = true;
                                        RedBlackRotateLeft(this, grandpa);
                                    }
                                }
                                parent = after.U;
                            }
                            this._.C = false;
                        },

                        remove: function(node) {
                            if (node.N) node.N.P = node.P;
                            if (node.P) node.P.N = node.N;
                            node.N = node.P = null;

                            var parent = node.U,
                                sibling,
                                left = node.L,
                                right = node.R,
                                next,
                                red;

                            if (!left) next = right;
                            else if (!right) next = left;
                            else next = RedBlackFirst(right);

                            if (parent) {
                                if (parent.L === node) parent.L = next;
                                else parent.R = next;
                            } else {
                                this._ = next;
                            }

                            if (left && right) {
                                red = next.C;
                                next.C = node.C;
                                next.L = left;
                                left.U = next;
                                if (next !== right) {
                                    parent = next.U;
                                    next.U = node.U;
                                    node = next.R;
                                    parent.L = node;
                                    next.R = right;
                                    right.U = next;
                                } else {
                                    next.U = parent;
                                    parent = next;
                                    node = next.R;
                                }
                            } else {
                                red = node.C;
                                node = next;
                            }

                            if (node) node.U = parent;
                            if (red) return;
                            if (node && node.C) { node.C = false; return; }

                            do {
                                if (node === this._) break;
                                if (node === parent.L) {
                                    sibling = parent.R;
                                    if (sibling.C) {
                                        sibling.C = false;
                                        parent.C = true;
                                        RedBlackRotateLeft(this, parent);
                                        sibling = parent.R;
                                    }
                                    if ((sibling.L && sibling.L.C) ||
                                        (sibling.R && sibling.R.C)) {
                                        if (!sibling.R || !sibling.R.C) {
                                            sibling.L.C = false;
                                            sibling.C = true;
                                            RedBlackRotateRight(this, sibling);
                                            sibling = parent.R;
                                        }
                                        sibling.C = parent.C;
                                        parent.C = sibling.R.C = false;
                                        RedBlackRotateLeft(this, parent);
                                        node = this._;
                                        break;
                                    }
                                } else {
                                    sibling = parent.L;
                                    if (sibling.C) {
                                        sibling.C = false;
                                        parent.C = true;
                                        RedBlackRotateRight(this, parent);
                                        sibling = parent.L;
                                    }
                                    if ((sibling.L && sibling.L.C) ||
                                        (sibling.R && sibling.R.C)) {
                                        if (!sibling.L || !sibling.L.C) {
                                            sibling.R.C = false;
                                            sibling.C = true;
                                            RedBlackRotateLeft(this, sibling);
                                            sibling = parent.L;
                                        }
                                        sibling.C = parent.C;
                                        parent.C = sibling.L.C = false;
                                        RedBlackRotateRight(this, parent);
                                        node = this._;
                                        break;
                                    }
                                }
                                sibling.C = true;
                                node = parent;
                                parent = parent.U;
                            } while (!node.C);

                            if (node) node.C = false;
                        }
                    };

                    function RedBlackRotateLeft(tree, node) {
                        var p = node,
                            q = node.R,
                            parent = p.U;

                        if (parent) {
                            if (parent.L === p) parent.L = q;
                            else parent.R = q;
                        } else {
                            tree._ = q;
                        }

                        q.U = parent;
                        p.U = q;
                        p.R = q.L;
                        if (p.R) p.R.U = p;
                        q.L = p;
                    }

                    function RedBlackRotateRight(tree, node) {
                        var p = node,
                            q = node.L,
                            parent = p.U;

                        if (parent) {
                            if (parent.L === p) parent.L = q;
                            else parent.R = q;
                        } else {
                            tree._ = q;
                        }

                        q.U = parent;
                        p.U = q;
                        p.L = q.R;
                        if (p.L) p.L.U = p;
                        q.R = p;
                    }

                    function RedBlackFirst(node) {
                        while (node.L) node = node.L;
                        return node;
                    }

                    function createEdge(left, right, v0, v1) {
                        var edge = [null, null],
                            index = edges.push(edge) - 1;
                        edge.left = left;
                        edge.right = right;
                        if (v0) setEdgeEnd(edge, left, right, v0);
                        if (v1) setEdgeEnd(edge, right, left, v1);
                        cells[left.index].halfedges.push(index);
                        cells[right.index].halfedges.push(index);
                        return edge;
                    }

                    function createBorderEdge(left, v0, v1) {
                        var edge = [v0, v1];
                        edge.left = left;
                        return edge;
                    }

                    function setEdgeEnd(edge, left, right, vertex) {
                        if (!edge[0] && !edge[1]) {
                            edge[0] = vertex;
                            edge.left = left;
                            edge.right = right;
                        } else if (edge.left === right) {
                            edge[1] = vertex;
                        } else {
                            edge[0] = vertex;
                        }
                    }

                    // Liang–Barsky line clipping.
                    function clipEdge(edge, x0, y0, x1, y1) {
                        var a = edge[0],
                            b = edge[1],
                            ax = a[0],
                            ay = a[1],
                            bx = b[0],
                            by = b[1],
                            t0 = 0,
                            t1 = 1,
                            dx = bx - ax,
                            dy = by - ay,
                            r;

                        r = x0 - ax;
                        if (!dx && r > 0) return;
                        r /= dx;
                        if (dx < 0) {
                            if (r < t0) return;
                            if (r < t1) t1 = r;
                        } else if (dx > 0) {
                            if (r > t1) return;
                            if (r > t0) t0 = r;
                        }

                        r = x1 - ax;
                        if (!dx && r < 0) return;
                        r /= dx;
                        if (dx < 0) {
                            if (r > t1) return;
                            if (r > t0) t0 = r;
                        } else if (dx > 0) {
                            if (r < t0) return;
                            if (r < t1) t1 = r;
                        }

                        r = y0 - ay;
                        if (!dy && r > 0) return;
                        r /= dy;
                        if (dy < 0) {
                            if (r < t0) return;
                            if (r < t1) t1 = r;
                        } else if (dy > 0) {
                            if (r > t1) return;
                            if (r > t0) t0 = r;
                        }

                        r = y1 - ay;
                        if (!dy && r < 0) return;
                        r /= dy;
                        if (dy < 0) {
                            if (r > t1) return;
                            if (r > t0) t0 = r;
                        } else if (dy > 0) {
                            if (r < t0) return;
                            if (r < t1) t1 = r;
                        }

                        if (!(t0 > 0) && !(t1 < 1)) return true; // TODO Better check?

                        if (t0 > 0) edge[0] = [ax + t0 * dx, ay + t0 * dy];
                        if (t1 < 1) edge[1] = [ax + t1 * dx, ay + t1 * dy];
                        return true;
                    }

                    function connectEdge(edge, x0, y0, x1, y1) {
                        var v1 = edge[1];
                        if (v1) return true;

                        var v0 = edge[0],
                            left = edge.left,
                            right = edge.right,
                            lx = left[0],
                            ly = left[1],
                            rx = right[0],
                            ry = right[1],
                            fx = (lx + rx) / 2,
                            fy = (ly + ry) / 2,
                            fm,
                            fb;

                        if (ry === ly) {
                            if (fx < x0 || fx >= x1) return;
                            if (lx > rx) {
                                if (!v0) v0 = [fx, y0];
                                else if (v0[1] >= y1) return;
                                v1 = [fx, y1];
                            } else {
                                if (!v0) v0 = [fx, y1];
                                else if (v0[1] < y0) return;
                                v1 = [fx, y0];
                            }
                        } else {
                            fm = (lx - rx) / (ry - ly);
                            fb = fy - fm * fx;
                            if (fm < -1 || fm > 1) {
                                if (lx > rx) {
                                    if (!v0) v0 = [(y0 - fb) / fm, y0];
                                    else if (v0[1] >= y1) return;
                                    v1 = [(y1 - fb) / fm, y1];
                                } else {
                                    if (!v0) v0 = [(y1 - fb) / fm, y1];
                                    else if (v0[1] < y0) return;
                                    v1 = [(y0 - fb) / fm, y0];
                                }
                            } else {
                                if (ly < ry) {
                                    if (!v0) v0 = [x0, fm * x0 + fb];
                                    else if (v0[0] >= x1) return;
                                    v1 = [x1, fm * x1 + fb];
                                } else {
                                    if (!v0) v0 = [x1, fm * x1 + fb];
                                    else if (v0[0] < x0) return;
                                    v1 = [x0, fm * x0 + fb];
                                }
                            }
                        }

                        edge[0] = v0;
                        edge[1] = v1;
                        return true;
                    }

                    function clipEdges(x0, y0, x1, y1) {
                        var i = edges.length,
                            edge;

                        while (i--) {
                            if (!connectEdge(edge = edges[i], x0, y0, x1, y1) ||
                                !clipEdge(edge, x0, y0, x1, y1) ||
                                !(Math.abs(edge[0][0] - edge[1][0]) > epsilon$4 ||
                                    Math.abs(edge[0][1] - edge[1][1]) > epsilon$4)) {
                                delete edges[i];
                            }
                        }
                    }

                    function createCell(site) {
                        return cells[site.index] = {
                            site: site,
                            halfedges: []
                        };
                    }

                    function cellHalfedgeAngle(cell, edge) {
                        var site = cell.site,
                            va = edge.left,
                            vb = edge.right;
                        if (site === vb) vb = va, va = site;
                        if (vb) return Math.atan2(vb[1] - va[1], vb[0] - va[0]);
                        if (site === va) va = edge[1], vb = edge[0];
                        else va = edge[0], vb = edge[1];
                        return Math.atan2(va[0] - vb[0], vb[1] - va[1]);
                    }

                    function cellHalfedgeStart(cell, edge) {
                        return edge[+(edge.left !== cell.site)];
                    }

                    function cellHalfedgeEnd(cell, edge) {
                        return edge[+(edge.left === cell.site)];
                    }

                    function sortCellHalfedges() {
                        for (var i = 0, n = cells.length, cell, halfedges, j, m; i < n; ++i) {
                            if ((cell = cells[i]) && (m = (halfedges = cell.halfedges).length)) {
                                var index = new Array(m),
                                    array = new Array(m);
                                for (j = 0; j < m; ++j) index[j] = j, array[j] = cellHalfedgeAngle(cell, edges[halfedges[j]]);
                                index.sort(function(i, j) { return array[j] - array[i]; });
                                for (j = 0; j < m; ++j) array[j] = halfedges[index[j]];
                                for (j = 0; j < m; ++j) halfedges[j] = array[j];
                            }
                        }
                    }

                    function clipCells(x0, y0, x1, y1) {
                        var nCells = cells.length,
                            iCell,
                            cell,
                            site,
                            iHalfedge,
                            halfedges,
                            nHalfedges,
                            start,
                            startX,
                            startY,
                            end,
                            endX,
                            endY,
                            cover = true;

                        for (iCell = 0; iCell < nCells; ++iCell) {
                            if (cell = cells[iCell]) {
                                site = cell.site;
                                halfedges = cell.halfedges;
                                iHalfedge = halfedges.length;

                                // Remove any dangling clipped edges.
                                while (iHalfedge--) {
                                    if (!edges[halfedges[iHalfedge]]) {
                                        halfedges.splice(iHalfedge, 1);
                                    }
                                }

                                // Insert any border edges as necessary.
                                iHalfedge = 0, nHalfedges = halfedges.length;
                                while (iHalfedge < nHalfedges) {
                                    end = cellHalfedgeEnd(cell, edges[halfedges[iHalfedge]]), endX = end[0], endY = end[1];
                                    start = cellHalfedgeStart(cell, edges[halfedges[++iHalfedge % nHalfedges]]), startX = start[0], startY = start[1];
                                    if (Math.abs(endX - startX) > epsilon$4 || Math.abs(endY - startY) > epsilon$4) {
                                        halfedges.splice(iHalfedge, 0, edges.push(createBorderEdge(site, end,
                                            Math.abs(endX - x0) < epsilon$4 && y1 - endY > epsilon$4 ? [x0, Math.abs(startX - x0) < epsilon$4 ? startY : y1] :
                                            Math.abs(endY - y1) < epsilon$4 && x1 - endX > epsilon$4 ? [Math.abs(startY - y1) < epsilon$4 ? startX : x1, y1] :
                                            Math.abs(endX - x1) < epsilon$4 && endY - y0 > epsilon$4 ? [x1, Math.abs(startX - x1) < epsilon$4 ? startY : y0] :
                                            Math.abs(endY - y0) < epsilon$4 && endX - x0 > epsilon$4 ? [Math.abs(startY - y0) < epsilon$4 ? startX : x0, y0] :
                                            null)) - 1);
                                        ++nHalfedges;
                                    }
                                }

                                if (nHalfedges) cover = false;
                            }
                        }

                        // If there weren’t any edges, have the closest site cover the extent.
                        // It doesn’t matter which corner of the extent we measure!
                        if (cover) {
                            var dx, dy, d2, dc = Infinity;

                            for (iCell = 0, cover = null; iCell < nCells; ++iCell) {
                                if (cell = cells[iCell]) {
                                    site = cell.site;
                                    dx = site[0] - x0;
                                    dy = site[1] - y0;
                                    d2 = dx * dx + dy * dy;
                                    if (d2 < dc) dc = d2, cover = cell;
                                }
                            }

                            if (cover) {
                                var v00 = [x0, y0],
                                    v01 = [x0, y1],
                                    v11 = [x1, y1],
                                    v10 = [x1, y0];
                                cover.halfedges.push(
                                    edges.push(createBorderEdge(site = cover.site, v00, v01)) - 1,
                                    edges.push(createBorderEdge(site, v01, v11)) - 1,
                                    edges.push(createBorderEdge(site, v11, v10)) - 1,
                                    edges.push(createBorderEdge(site, v10, v00)) - 1
                                );
                            }
                        }

                        // Lastly delete any cells with no edges; these were entirely clipped.
                        for (iCell = 0; iCell < nCells; ++iCell) {
                            if (cell = cells[iCell]) {
                                if (!cell.halfedges.length) {
                                    delete cells[iCell];
                                }
                            }
                        }
                    }

                    var circlePool = [];

                    var firstCircle;

                    function Circle() {
                        RedBlackNode(this);
                        this.x =
                            this.y =
                            this.arc =
                            this.site =
                            this.cy = null;
                    }

                    function attachCircle(arc) {
                        var lArc = arc.P,
                            rArc = arc.N;

                        if (!lArc || !rArc) return;

                        var lSite = lArc.site,
                            cSite = arc.site,
                            rSite = rArc.site;

                        if (lSite === rSite) return;

                        var bx = cSite[0],
                            by = cSite[1],
                            ax = lSite[0] - bx,
                            ay = lSite[1] - by,
                            cx = rSite[0] - bx,
                            cy = rSite[1] - by;

                        var d = 2 * (ax * cy - ay * cx);
                        if (d >= -epsilon2$2) return;

                        var ha = ax * ax + ay * ay,
                            hc = cx * cx + cy * cy,
                            x = (cy * ha - ay * hc) / d,
                            y = (ax * hc - cx * ha) / d;

                        var circle = circlePool.pop() || new Circle;
                        circle.arc = arc;
                        circle.site = cSite;
                        circle.x = x + bx;
                        circle.y = (circle.cy = y + by) + Math.sqrt(x * x + y * y); // y bottom

                        arc.circle = circle;

                        var before = null,
                            node = circles._;

                        while (node) {
                            if (circle.y < node.y || (circle.y === node.y && circle.x <= node.x)) {
                                if (node.L) node = node.L;
                                else { before = node.P; break; }
                            } else {
                                if (node.R) node = node.R;
                                else { before = node; break; }
                            }
                        }

                        circles.insert(before, circle);
                        if (!before) firstCircle = circle;
                    }

                    function detachCircle(arc) {
                        var circle = arc.circle;
                        if (circle) {
                            if (!circle.P) firstCircle = circle.N;
                            circles.remove(circle);
                            circlePool.push(circle);
                            RedBlackNode(circle);
                            arc.circle = null;
                        }
                    }

                    var beachPool = [];

                    function Beach() {
                        RedBlackNode(this);
                        this.edge =
                            this.site =
                            this.circle = null;
                    }

                    function createBeach(site) {
                        var beach = beachPool.pop() || new Beach;
                        beach.site = site;
                        return beach;
                    }

                    function detachBeach(beach) {
                        detachCircle(beach);
                        beaches.remove(beach);
                        beachPool.push(beach);
                        RedBlackNode(beach);
                    }

                    function removeBeach(beach) {
                        var circle = beach.circle,
                            x = circle.x,
                            y = circle.cy,
                            vertex = [x, y],
                            previous = beach.P,
                            next = beach.N,
                            disappearing = [beach];

                        detachBeach(beach);

                        var lArc = previous;
                        while (lArc.circle &&
                            Math.abs(x - lArc.circle.x) < epsilon$4 &&
                            Math.abs(y - lArc.circle.cy) < epsilon$4) {
                            previous = lArc.P;
                            disappearing.unshift(lArc);
                            detachBeach(lArc);
                            lArc = previous;
                        }

                        disappearing.unshift(lArc);
                        detachCircle(lArc);

                        var rArc = next;
                        while (rArc.circle &&
                            Math.abs(x - rArc.circle.x) < epsilon$4 &&
                            Math.abs(y - rArc.circle.cy) < epsilon$4) {
                            next = rArc.N;
                            disappearing.push(rArc);
                            detachBeach(rArc);
                            rArc = next;
                        }

                        disappearing.push(rArc);
                        detachCircle(rArc);

                        var nArcs = disappearing.length,
                            iArc;
                        for (iArc = 1; iArc < nArcs; ++iArc) {
                            rArc = disappearing[iArc];
                            lArc = disappearing[iArc - 1];
                            setEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex);
                        }

                        lArc = disappearing[0];
                        rArc = disappearing[nArcs - 1];
                        rArc.edge = createEdge(lArc.site, rArc.site, null, vertex);

                        attachCircle(lArc);
                        attachCircle(rArc);
                    }

                    function addBeach(site) {
                        var x = site[0],
                            directrix = site[1],
                            lArc,
                            rArc,
                            dxl,
                            dxr,
                            node = beaches._;

                        while (node) {
                            dxl = leftBreakPoint(node, directrix) - x;
                            if (dxl > epsilon$4) node = node.L;
                            else {
                                dxr = x - rightBreakPoint(node, directrix);
                                if (dxr > epsilon$4) {
                                    if (!node.R) {
                                        lArc = node;
                                        break;
                                    }
                                    node = node.R;
                                } else {
                                    if (dxl > -epsilon$4) {
                                        lArc = node.P;
                                        rArc = node;
                                    } else if (dxr > -epsilon$4) {
                                        lArc = node;
                                        rArc = node.N;
                                    } else {
                                        lArc = rArc = node;
                                    }
                                    break;
                                }
                            }
                        }

                        createCell(site);
                        var newArc = createBeach(site);
                        beaches.insert(lArc, newArc);

                        if (!lArc && !rArc) return;

                        if (lArc === rArc) {
                            detachCircle(lArc);
                            rArc = createBeach(lArc.site);
                            beaches.insert(newArc, rArc);
                            newArc.edge = rArc.edge = createEdge(lArc.site, newArc.site);
                            attachCircle(lArc);
                            attachCircle(rArc);
                            return;
                        }

                        if (!rArc) { // && lArc
                            newArc.edge = createEdge(lArc.site, newArc.site);
                            return;
                        }

                        // else lArc !== rArc
                        detachCircle(lArc);
                        detachCircle(rArc);

                        var lSite = lArc.site,
                            ax = lSite[0],
                            ay = lSite[1],
                            bx = site[0] - ax,
                            by = site[1] - ay,
                            rSite = rArc.site,
                            cx = rSite[0] - ax,
                            cy = rSite[1] - ay,
                            d = 2 * (bx * cy - by * cx),
                            hb = bx * bx + by * by,
                            hc = cx * cx + cy * cy,
                            vertex = [(cy * hb - by * hc) / d + ax, (bx * hc - cx * hb) / d + ay];

                        setEdgeEnd(rArc.edge, lSite, rSite, vertex);
                        newArc.edge = createEdge(lSite, site, null, vertex);
                        rArc.edge = createEdge(site, rSite, null, vertex);
                        attachCircle(lArc);
                        attachCircle(rArc);
                    }

                    function leftBreakPoint(arc, directrix) {
                        var site = arc.site,
                            rfocx = site[0],
                            rfocy = site[1],
                            pby2 = rfocy - directrix;

                        if (!pby2) return rfocx;

                        var lArc = arc.P;
                        if (!lArc) return -Infinity;

                        site = lArc.site;
                        var lfocx = site[0],
                            lfocy = site[1],
                            plby2 = lfocy - directrix;

                        if (!plby2) return lfocx;

                        var hl = lfocx - rfocx,
                            aby2 = 1 / pby2 - 1 / plby2,
                            b = hl / plby2;

                        if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx;

                        return (rfocx + lfocx) / 2;
                    }

                    function rightBreakPoint(arc, directrix) {
                        var rArc = arc.N;
                        if (rArc) return leftBreakPoint(rArc, directrix);
                        var site = arc.site;
                        return site[1] === directrix ? site[0] : Infinity;
                    }

                    var epsilon$4 = 1e-6;
                    var epsilon2$2 = 1e-12;
                    var beaches;
                    var cells;
                    var circles;
                    var edges;

                    function triangleArea(a, b, c) {
                        return (a[0] - c[0]) * (b[1] - a[1]) - (a[0] - b[0]) * (c[1] - a[1]);
                    }

                    function lexicographic(a, b) {
                        return b[1] - a[1] ||
                            b[0] - a[0];
                    }

                    function Diagram(sites, extent) {
                        var site = sites.sort(lexicographic).pop(),
                            x,
                            y,
                            circle;

                        edges = [];
                        cells = new Array(sites.length);
                        beaches = new RedBlackTree;
                        circles = new RedBlackTree;

                        while (true) {
                            circle = firstCircle;
                            if (site && (!circle || site[1] < circle.y || (site[1] === circle.y && site[0] < circle.x))) {
                                if (site[0] !== x || site[1] !== y) {
                                    addBeach(site);
                                    x = site[0], y = site[1];
                                }
                                site = sites.pop();
                            } else if (circle) {
                                removeBeach(circle.arc);
                            } else {
                                break;
                            }
                        }

                        sortCellHalfedges();

                        if (extent) {
                            var x0 = +extent[0][0],
                                y0 = +extent[0][1],
                                x1 = +extent[1][0],
                                y1 = +extent[1][1];
                            clipEdges(x0, y0, x1, y1);
                            clipCells(x0, y0, x1, y1);
                        }

                        this.edges = edges;
                        this.cells = cells;

                        beaches =
                            circles =
                            edges =
                            cells = null;
                    }

                    Diagram.prototype = {
                        constructor: Diagram,

                        polygons: function() {
                            var edges = this.edges;

                            return this.cells.map(function(cell) {
                                var polygon = cell.halfedges.map(function(i) { return cellHalfedgeStart(cell, edges[i]); });
                                polygon.data = cell.site.data;
                                return polygon;
                            });
                        },

                        triangles: function() {
                            var triangles = [],
                                edges = this.edges;

                            this.cells.forEach(function(cell, i) {
                                if (!(m = (halfedges = cell.halfedges).length)) return;
                                var site = cell.site,
                                    halfedges,
                                    j = -1,
                                    m,
                                    s0,
                                    e1 = edges[halfedges[m - 1]],
                                    s1 = e1.left === site ? e1.right : e1.left;

                                while (++j < m) {
                                    s0 = s1;
                                    e1 = edges[halfedges[j]];
                                    s1 = e1.left === site ? e1.right : e1.left;
                                    if (s0 && s1 && i < s0.index && i < s1.index && triangleArea(site, s0, s1) < 0) {
                                        triangles.push([site.data, s0.data, s1.data]);
                                    }
                                }
                            });

                            return triangles;
                        },

                        links: function() {
                            return this.edges.filter(function(edge) {
                                return edge.right;
                            }).map(function(edge) {
                                return {
                                    source: edge.left.data,
                                    target: edge.right.data
                                };
                            });
                        },

                        find: function(x, y, radius) {
                            var that = this,
                                i0, i1 = that._found || 0,
                                n = that.cells.length,
                                cell;

                            // Use the previously-found cell, or start with an arbitrary one.
                            while (!(cell = that.cells[i1]))
                                if (++i1 >= n) return null;
                            var dx = x - cell.site[0],
                                dy = y - cell.site[1],
                                d2 = dx * dx + dy * dy;

                            // Traverse the half-edges to find a closer cell, if any.
                            do {
                                cell = that.cells[i0 = i1], i1 = null;
                                cell.halfedges.forEach(function(e) {
                                    var edge = that.edges[e],
                                        v = edge.left;
                                    if ((v === cell.site || !v) && !(v = edge.right)) return;
                                    var vx = x - v[0],
                                        vy = y - v[1],
                                        v2 = vx * vx + vy * vy;
                                    if (v2 < d2) d2 = v2, i1 = v.index;
                                });
                            } while (i1 !== null);

                            that._found = i0;

                            return radius == null || d2 <= radius * radius ? cell.site : null;
                        }
                    };

                    var voronoi = function() {
                        var x$$1 = x$4,
                            y$$1 = y$4,
                            extent = null;

                        function voronoi(data) {
                            return new Diagram(data.map(function(d, i) {
                                var s = [Math.round(x$$1(d, i, data) / epsilon$4) * epsilon$4, Math.round(y$$1(d, i, data) / epsilon$4) * epsilon$4];
                                s.index = i;
                                s.data = d;
                                return s;
                            }), extent);
                        }

                        voronoi.polygons = function(data) {
                            return voronoi(data).polygons();
                        };

                        voronoi.links = function(data) {
                            return voronoi(data).links();
                        };

                        voronoi.triangles = function(data) {
                            return voronoi(data).triangles();
                        };

                        voronoi.x = function(_) {
                            return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$11(+_), voronoi) : x$$1;
                        };

                        voronoi.y = function(_) {
                            return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$11(+_), voronoi) : y$$1;
                        };

                        voronoi.extent = function(_) {
                            return arguments.length ? (extent = _ == null ? null : [
                                [+_[0][0], +_[0][1]],
                                [+_[1][0], +_[1][1]]
                            ], voronoi) : extent && [
                                [extent[0][0], extent[0][1]],
                                [extent[1][0], extent[1][1]]
                            ];
                        };

                        voronoi.size = function(_) {
                            return arguments.length ? (extent = _ == null ? null : [
                                [0, 0],
                                [+_[0], +_[1]]
                            ], voronoi) : extent && [extent[1][0] - extent[0][0], extent[1][1] - extent[0][1]];
                        };

                        return voronoi;
                    };

                    var constant$12 = function(x) {
                        return function() {
                            return x;
                        };
                    };

                    function ZoomEvent(target, type, transform) {
                        this.target = target;
                        this.type = type;
                        this.transform = transform;
                    }

                    function Transform(k, x, y) {
                        this.k = k;
                        this.x = x;
                        this.y = y;
                    }

                    Transform.prototype = {
                        constructor: Transform,
                        scale: function(k) {
                            return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
                        },
                        translate: function(x, y) {
                            return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
                        },
                        apply: function(point) {
                            return [point[0] * this.k + this.x, point[1] * this.k + this.y];
                        },
                        applyX: function(x) {
                            return x * this.k + this.x;
                        },
                        applyY: function(y) {
                            return y * this.k + this.y;
                        },
                        invert: function(location) {
                            return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
                        },
                        invertX: function(x) {
                            return (x - this.x) / this.k;
                        },
                        invertY: function(y) {
                            return (y - this.y) / this.k;
                        },
                        rescaleX: function(x) {
                            return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
                        },
                        rescaleY: function(y) {
                            return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
                        },
                        toString: function() {
                            return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
                        }
                    };

                    var identity$8 = new Transform(1, 0, 0);

                    transform$1.prototype = Transform.prototype;

                    function transform$1(node) {
                        return node.__zoom || identity$8;
                    }

                    function nopropagation$2() {
                        exports.event.stopImmediatePropagation();
                    }

                    var noevent$2 = function() {
                        exports.event.preventDefault();
                        exports.event.stopImmediatePropagation();
                    };

                    // Ignore right-click, since that should open the context menu.
                    function defaultFilter$2() {
                        return !exports.event.button;
                    }

                    function defaultExtent$1() {
                        var e = this,
                            w, h;
                        if (e instanceof SVGElement) {
                            e = e.ownerSVGElement || e;
                            w = e.width.baseVal.value;
                            h = e.height.baseVal.value;
                        } else {
                            w = e.clientWidth;
                            h = e.clientHeight;
                        }
                        return [
                            [0, 0],
                            [w, h]
                        ];
                    }

                    function defaultTransform() {
                        return this.__zoom || identity$8;
                    }

                    var zoom = function() {
                        var filter = defaultFilter$2,
                            extent = defaultExtent$1,
                            k0 = 0,
                            k1 = Infinity,
                            x0 = -k1,
                            x1 = k1,
                            y0 = x0,
                            y1 = x1,
                            duration = 250,
                            interpolate$$1 = interpolateZoom,
                            gestures = [],
                            listeners = dispatch("start", "zoom", "end"),
                            touchstarting,
                            touchending,
                            touchDelay = 500,
                            wheelDelay = 150;

                        function zoom(selection$$1) {
                            selection$$1
                                .on("wheel.zoom", wheeled)
                                .on("mousedown.zoom", mousedowned)
                                .on("dblclick.zoom", dblclicked)
                                .on("touchstart.zoom", touchstarted)
                                .on("touchmove.zoom", touchmoved)
                                .on("touchend.zoom touchcancel.zoom", touchended)
                                .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)")
                                .property("__zoom", defaultTransform);
                        }

                        zoom.transform = function(collection, transform) {
                            var selection$$1 = collection.selection ? collection.selection() : collection;
                            selection$$1.property("__zoom", defaultTransform);
                            if (collection !== selection$$1) {
                                schedule(collection, transform);
                            } else {
                                selection$$1.interrupt().each(function() {
                                    gesture(this, arguments)
                                        .start()
                                        .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
                                        .end();
                                });
                            }
                        };

                        zoom.scaleBy = function(selection$$1, k) {
                            zoom.scaleTo(selection$$1, function() {
                                var k0 = this.__zoom.k,
                                    k1 = typeof k === "function" ? k.apply(this, arguments) : k;
                                return k0 * k1;
                            });
                        };

                        zoom.scaleTo = function(selection$$1, k) {
                            zoom.transform(selection$$1, function() {
                                var e = extent.apply(this, arguments),
                                    t0 = this.__zoom,
                                    p0 = centroid(e),
                                    p1 = t0.invert(p0),
                                    k1 = typeof k === "function" ? k.apply(this, arguments) : k;
                                return constrain(translate(scale(t0, k1), p0, p1), e);
                            });
                        };

                        zoom.translateBy = function(selection$$1, x, y) {
                            zoom.transform(selection$$1, function() {
                                return constrain(this.__zoom.translate(
                                    typeof x === "function" ? x.apply(this, arguments) : x,
                                    typeof y === "function" ? y.apply(this, arguments) : y
                                ), extent.apply(this, arguments));
                            });
                        };

                        function scale(transform, k) {
                            k = Math.max(k0, Math.min(k1, k));
                            return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
                        }

                        function translate(transform, p0, p1) {
                            var x = p0[0] - p1[0] * transform.k,
                                y = p0[1] - p1[1] * transform.k;
                            return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
                        }

                        function constrain(transform, extent) {
                            var dx0 = transform.invertX(extent[0][0]) - x0,
                                dx1 = transform.invertX(extent[1][0]) - x1,
                                dy0 = transform.invertY(extent[0][1]) - y0,
                                dy1 = transform.invertY(extent[1][1]) - y1;
                            return transform.translate(
                                dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
                                dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
                            );
                        }

                        function centroid(extent) {
                            return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
                        }

                        function schedule(transition$$1, transform, center) {
                            transition$$1
                                .on("start.zoom", function() { gesture(this, arguments).start(); })
                                .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); })
                                .tween("zoom", function() {
                                    var that = this,
                                        args = arguments,
                                        g = gesture(that, args),
                                        e = extent.apply(that, args),
                                        p = center || centroid(e),
                                        w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
                                        a = that.__zoom,
                                        b = typeof transform === "function" ? transform.apply(that, args) : transform,
                                        i = interpolate$$1(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
                                    return function(t) {
                                        if (t === 1) t = b; // Avoid rounding error on end.
                                        else {
                                            var l = i(t),
                                                k = w / l[2];
                                            t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
                                        }
                                        g.zoom(null, t);
                                    };
                                });
                        }

                        function gesture(that, args) {
                            for (var i = 0, n = gestures.length, g; i < n; ++i) {
                                if ((g = gestures[i]).that === that) {
                                    return g;
                                }
                            }
                            return new Gesture(that, args);
                        }

                        function Gesture(that, args) {
                            this.that = that;
                            this.args = args;
                            this.index = -1;
                            this.active = 0;
                            this.extent = extent.apply(that, args);
                        }

                        Gesture.prototype = {
                            start: function() {
                                if (++this.active === 1) {
                                    this.index = gestures.push(this) - 1;
                                    this.emit("start");
                                }
                                return this;
                            },
                            zoom: function(key, transform) {
                                if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
                                if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
                                if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
                                this.that.__zoom = transform;
                                this.emit("zoom");
                                return this;
                            },
                            end: function() {
                                if (--this.active === 0) {
                                    gestures.splice(this.index, 1);
                                    this.index = -1;
                                    this.emit("end");
                                }
                                return this;
                            },
                            emit: function(type) {
                                customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);
                            }
                        };

                        function wheeled() {
                            if (!filter.apply(this, arguments)) return;
                            var g = gesture(this, arguments),
                                t = this.__zoom,
                                k = Math.max(k0, Math.min(k1, t.k * Math.pow(2, -exports.event.deltaY * (exports.event.deltaMode ? 120 : 1) / 500))),
                                p = mouse(this);

                            // If the mouse is in the same location as before, reuse it.
                            // If there were recent wheel events, reset the wheel idle timeout.
                            if (g.wheel) {
                                if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
                                    g.mouse[1] = t.invert(g.mouse[0] = p);
                                }
                                clearTimeout(g.wheel);
                            }

                            // If this wheel event won’t trigger a transform change, ignore it.
                            else if (t.k === k) return;

                            // Otherwise, capture the mouse point and location at the start.
                            else {
                                g.mouse = [p, t.invert(p)];
                                interrupt(this);
                                g.start();
                            }

                            noevent$2();
                            g.wheel = setTimeout(wheelidled, wheelDelay);
                            g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent));

                            function wheelidled() {
                                g.wheel = null;
                                g.end();
                            }
                        }

                        function mousedowned() {
                            if (touchending || !filter.apply(this, arguments)) return;
                            var g = gesture(this, arguments),
                                v = select(exports.event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
                                p = mouse(this);

                            dragDisable(exports.event.view);
                            nopropagation$2();
                            g.mouse = [p, this.__zoom.invert(p)];
                            interrupt(this);
                            g.start();

                            function mousemoved() {
                                noevent$2();
                                g.moved = true;
                                g.zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent));
                            }

                            function mouseupped() {
                                v.on("mousemove.zoom mouseup.zoom", null);
                                yesdrag(exports.event.view, g.moved);
                                noevent$2();
                                g.end();
                            }
                        }

                        function dblclicked() {
                            if (!filter.apply(this, arguments)) return;
                            var t0 = this.__zoom,
                                p0 = mouse(this),
                                p1 = t0.invert(p0),
                                k1 = t0.k * (exports.event.shiftKey ? 0.5 : 2),
                                t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments));

                            noevent$2();
                            if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0);
                            else select(this).call(zoom.transform, t1);
                        }

                        function touchstarted() {
                            if (!filter.apply(this, arguments)) return;
                            var g = gesture(this, arguments),
                                touches$$1 = exports.event.changedTouches,
                                started,
                                n = touches$$1.length,
                                i, t, p;

                            nopropagation$2();
                            for (i = 0; i < n; ++i) {
                                t = touches$$1[i], p = touch(this, touches$$1, t.identifier);
                                p = [p, this.__zoom.invert(p), t.identifier];
                                if (!g.touch0) g.touch0 = p, started = true;
                                else if (!g.touch1) g.touch1 = p;
                            }

                            // If this is a dbltap, reroute to the (optional) dblclick.zoom handler.
                            if (touchstarting) {
                                touchstarting = clearTimeout(touchstarting);
                                if (!g.touch1) {
                                    g.end();
                                    p = select(this).on("dblclick.zoom");
                                    if (p) p.apply(this, arguments);
                                    return;
                                }
                            }

                            if (started) {
                                touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);
                                interrupt(this);
                                g.start();
                            }
                        }

                        function touchmoved() {
                            var g = gesture(this, arguments),
                                touches$$1 = exports.event.changedTouches,
                                n = touches$$1.length,
                                i, t, p, l;

                            noevent$2();
                            if (touchstarting) touchstarting = clearTimeout(touchstarting);
                            for (i = 0; i < n; ++i) {
                                t = touches$$1[i], p = touch(this, touches$$1, t.identifier);
                                if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;
                                else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
                            }
                            t = g.that.__zoom;
                            if (g.touch1) {
                                var p0 = g.touch0[0],
                                    l0 = g.touch0[1],
                                    p1 = g.touch1[0],
                                    l1 = g.touch1[1],
                                    dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
                                    dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
                                t = scale(t, Math.sqrt(dp / dl));
                                p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
                                l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
                            } else if (g.touch0) p = g.touch0[0], l = g.touch0[1];
                            else return;
                            g.zoom("touch", constrain(translate(t, p, l), g.extent));
                        }

                        function touchended() {
                            var g = gesture(this, arguments),
                                touches$$1 = exports.event.changedTouches,
                                n = touches$$1.length,
                                i, t;

                            nopropagation$2();
                            if (touchending) clearTimeout(touchending);
                            touchending = setTimeout(function() { touchending = null; }, touchDelay);
                            for (i = 0; i < n; ++i) {
                                t = touches$$1[i];
                                if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;
                                else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
                            }
                            if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
                            if (!g.touch0) g.end();
                        }

                        zoom.filter = function(_) {
                            return arguments.length ? (filter = typeof _ === "function" ? _ : constant$12(!!_), zoom) : filter;
                        };

                        zoom.extent = function(_) {
                            return arguments.length ? (extent = typeof _ === "function" ? _ : constant$12([
                                [+_[0][0], +_[0][1]],
                                [+_[1][0], +_[1][1]]
                            ]), zoom) : extent;
                        };

                        zoom.scaleExtent = function(_) {
                            return arguments.length ? (k0 = +_[0], k1 = +_[1], zoom) : [k0, k1];
                        };

                        zoom.translateExtent = function(_) {
                            return arguments.length ? (x0 = +_[0][0], x1 = +_[1][0], y0 = +_[0][1], y1 = +_[1][1], zoom) : [
                                [x0, y0],
                                [x1, y1]
                            ];
                        };

                        zoom.duration = function(_) {
                            return arguments.length ? (duration = +_, zoom) : duration;
                        };

                        zoom.interpolate = function(_) {
                            return arguments.length ? (interpolate$$1 = _, zoom) : interpolate$$1;
                        };

                        zoom.on = function() {
                            var value = listeners.on.apply(listeners, arguments);
                            return value === listeners ? zoom : value;
                        };

                        return zoom;
                    };

                    exports.version = version;
                    exports.bisect = bisectRight;
                    exports.bisectRight = bisectRight;
                    exports.bisectLeft = bisectLeft;
                    exports.ascending = ascending;
                    exports.bisector = bisector;
                    exports.descending = descending;
                    exports.deviation = deviation;
                    exports.extent = extent;
                    exports.histogram = histogram;
                    exports.thresholdFreedmanDiaconis = freedmanDiaconis;
                    exports.thresholdScott = scott;
                    exports.thresholdSturges = sturges;
                    exports.max = max;
                    exports.mean = mean;
                    exports.median = median;
                    exports.merge = merge;
                    exports.min = min;
                    exports.pairs = pairs;
                    exports.permute = permute;
                    exports.quantile = threshold;
                    exports.range = sequence;
                    exports.scan = scan;
                    exports.shuffle = shuffle;
                    exports.sum = sum;
                    exports.ticks = ticks;
                    exports.tickStep = tickStep;
                    exports.transpose = transpose;
                    exports.variance = variance;
                    exports.zip = zip;
                    exports.axisTop = axisTop;
                    exports.axisRight = axisRight;
                    exports.axisBottom = axisBottom;
                    exports.axisLeft = axisLeft;
                    exports.brush = brush;
                    exports.brushX = brushX;
                    exports.brushY = brushY;
                    exports.brushSelection = brushSelection;
                    exports.chord = chord;
                    exports.ribbon = ribbon;
                    exports.nest = nest;
                    exports.set = set$2;
                    exports.map = map$1;
                    exports.keys = keys;
                    exports.values = values;
                    exports.entries = entries;
                    exports.color = color;
                    exports.rgb = rgb;
                    exports.hsl = hsl;
                    exports.lab = lab;
                    exports.hcl = hcl;
                    exports.cubehelix = cubehelix;
                    exports.dispatch = dispatch;
                    exports.drag = drag;
                    exports.dragDisable = dragDisable;
                    exports.dragEnable = yesdrag;
                    exports.dsvFormat = dsv;
                    exports.csvParse = csvParse;
                    exports.csvParseRows = csvParseRows;
                    exports.csvFormat = csvFormat;
                    exports.csvFormatRows = csvFormatRows;
                    exports.tsvParse = tsvParse;
                    exports.tsvParseRows = tsvParseRows;
                    exports.tsvFormat = tsvFormat;
                    exports.tsvFormatRows = tsvFormatRows;
                    exports.easeLinear = linear$1;
                    exports.easeQuad = quadInOut;
                    exports.easeQuadIn = quadIn;
                    exports.easeQuadOut = quadOut;
                    exports.easeQuadInOut = quadInOut;
                    exports.easeCubic = cubicInOut;
                    exports.easeCubicIn = cubicIn;
                    exports.easeCubicOut = cubicOut;
                    exports.easeCubicInOut = cubicInOut;
                    exports.easePoly = polyInOut;
                    exports.easePolyIn = polyIn;
                    exports.easePolyOut = polyOut;
                    exports.easePolyInOut = polyInOut;
                    exports.easeSin = sinInOut;
                    exports.easeSinIn = sinIn;
                    exports.easeSinOut = sinOut;
                    exports.easeSinInOut = sinInOut;
                    exports.easeExp = expInOut;
                    exports.easeExpIn = expIn;
                    exports.easeExpOut = expOut;
                    exports.easeExpInOut = expInOut;
                    exports.easeCircle = circleInOut;
                    exports.easeCircleIn = circleIn;
                    exports.easeCircleOut = circleOut;
                    exports.easeCircleInOut = circleInOut;
                    exports.easeBounce = bounceOut;
                    exports.easeBounceIn = bounceIn;
                    exports.easeBounceOut = bounceOut;
                    exports.easeBounceInOut = bounceInOut;
                    exports.easeBack = backInOut;
                    exports.easeBackIn = backIn;
                    exports.easeBackOut = backOut;
                    exports.easeBackInOut = backInOut;
                    exports.easeElastic = elasticOut;
                    exports.easeElasticIn = elasticIn;
                    exports.easeElasticOut = elasticOut;
                    exports.easeElasticInOut = elasticInOut;
                    exports.forceCenter = center$1;
                    exports.forceCollide = collide;
                    exports.forceLink = link;
                    exports.forceManyBody = manyBody;
                    exports.forceSimulation = simulation;
                    exports.forceX = x$2;
                    exports.forceY = y$2;
                    exports.formatDefaultLocale = defaultLocale;
                    exports.formatLocale = formatLocale;
                    exports.formatSpecifier = formatSpecifier;
                    exports.precisionFixed = precisionFixed;
                    exports.precisionPrefix = precisionPrefix;
                    exports.precisionRound = precisionRound;
                    exports.geoArea = area;
                    exports.geoBounds = bounds;
                    exports.geoCentroid = centroid;
                    exports.geoCircle = circle;
                    exports.geoClipExtent = extent$1;
                    exports.geoDistance = distance;
                    exports.geoGraticule = graticule;
                    exports.geoGraticule10 = graticule10;
                    exports.geoInterpolate = interpolate$1;
                    exports.geoLength = length$1;
                    exports.geoPath = index$1;
                    exports.geoAlbers = albers;
                    exports.geoAlbersUsa = albersUsa;
                    exports.geoAzimuthalEqualArea = azimuthalEqualArea;
                    exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;
                    exports.geoAzimuthalEquidistant = azimuthalEquidistant;
                    exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;
                    exports.geoConicConformal = conicConformal;
                    exports.geoConicConformalRaw = conicConformalRaw;
                    exports.geoConicEqualArea = conicEqualArea;
                    exports.geoConicEqualAreaRaw = conicEqualAreaRaw;
                    exports.geoConicEquidistant = conicEquidistant;
                    exports.geoConicEquidistantRaw = conicEquidistantRaw;
                    exports.geoEquirectangular = equirectangular;
                    exports.geoEquirectangularRaw = equirectangularRaw;
                    exports.geoGnomonic = gnomonic;
                    exports.geoGnomonicRaw = gnomonicRaw;
                    exports.geoIdentity = identity$5;
                    exports.geoProjection = projection;
                    exports.geoProjectionMutator = projectionMutator;
                    exports.geoMercator = mercator;
                    exports.geoMercatorRaw = mercatorRaw;
                    exports.geoOrthographic = orthographic;
                    exports.geoOrthographicRaw = orthographicRaw;
                    exports.geoStereographic = stereographic;
                    exports.geoStereographicRaw = stereographicRaw;
                    exports.geoTransverseMercator = transverseMercator;
                    exports.geoTransverseMercatorRaw = transverseMercatorRaw;
                    exports.geoRotation = rotation;
                    exports.geoStream = geoStream;
                    exports.geoTransform = transform;
                    exports.cluster = cluster;
                    exports.hierarchy = hierarchy;
                    exports.pack = index$2;
                    exports.packSiblings = siblings;
                    exports.packEnclose = enclose;
                    exports.partition = partition;
                    exports.stratify = stratify;
                    exports.tree = tree;
                    exports.treemap = index$3;
                    exports.treemapBinary = binary;
                    exports.treemapDice = treemapDice;
                    exports.treemapSlice = treemapSlice;
                    exports.treemapSliceDice = sliceDice;
                    exports.treemapSquarify = squarify;
                    exports.treemapResquarify = resquarify;
                    exports.interpolate = interpolateValue;
                    exports.interpolateArray = array$1;
                    exports.interpolateBasis = basis$1;
                    exports.interpolateBasisClosed = basisClosed;
                    exports.interpolateDate = date;
                    exports.interpolateNumber = reinterpolate;
                    exports.interpolateObject = object;
                    exports.interpolateRound = interpolateRound;
                    exports.interpolateString = interpolateString;
                    exports.interpolateTransformCss = interpolateTransformCss;
                    exports.interpolateTransformSvg = interpolateTransformSvg;
                    exports.interpolateZoom = interpolateZoom;
                    exports.interpolateRgb = interpolateRgb;
                    exports.interpolateRgbBasis = rgbBasis;
                    exports.interpolateRgbBasisClosed = rgbBasisClosed;
                    exports.interpolateHsl = hsl$2;
                    exports.interpolateHslLong = hslLong;
                    exports.interpolateLab = lab$1;
                    exports.interpolateHcl = hcl$2;
                    exports.interpolateHclLong = hclLong;
                    exports.interpolateCubehelix = cubehelix$2;
                    exports.interpolateCubehelixLong = cubehelixLong;
                    exports.quantize = quantize;
                    exports.path = path;
                    exports.polygonArea = area$1;
                    exports.polygonCentroid = centroid$1;
                    exports.polygonHull = hull;
                    exports.polygonContains = contains;
                    exports.polygonLength = length$2;
                    exports.quadtree = quadtree;
                    exports.queue = queue;
                    exports.randomUniform = uniform;
                    exports.randomNormal = normal;
                    exports.randomLogNormal = logNormal;
                    exports.randomBates = bates;
                    exports.randomIrwinHall = irwinHall;
                    exports.randomExponential = exponential$1;
                    exports.request = request;
                    exports.html = html;
                    exports.json = json;
                    exports.text = text;
                    exports.xml = xml;
                    exports.csv = csv$1;
                    exports.tsv = tsv$1;
                    exports.scaleBand = band;
                    exports.scalePoint = point$1;
                    exports.scaleIdentity = identity$6;
                    exports.scaleLinear = linear$2;
                    exports.scaleLog = log$1;
                    exports.scaleOrdinal = ordinal;
                    exports.scaleImplicit = implicit;
                    exports.scalePow = pow$1;
                    exports.scaleSqrt = sqrt$1;
                    exports.scaleQuantile = quantile$$1;
                    exports.scaleQuantize = quantize$1;
                    exports.scaleThreshold = threshold$1;
                    exports.scaleTime = time;
                    exports.scaleUtc = utcTime;
                    exports.schemeCategory10 = category10;
                    exports.schemeCategory20b = category20b;
                    exports.schemeCategory20c = category20c;
                    exports.schemeCategory20 = category20;
                    exports.interpolateCubehelixDefault = cubehelix$3;
                    exports.interpolateRainbow = rainbow$1;
                    exports.interpolateWarm = warm;
                    exports.interpolateCool = cool;
                    exports.interpolateViridis = viridis;
                    exports.interpolateMagma = magma;
                    exports.interpolateInferno = inferno;
                    exports.interpolatePlasma = plasma;
                    exports.scaleSequential = sequential;
                    exports.creator = creator;
                    exports.local = local$1;
                    exports.matcher = matcher$1;
                    exports.mouse = mouse;
                    exports.namespace = namespace;
                    exports.namespaces = namespaces;
                    exports.select = select;
                    exports.selectAll = selectAll;
                    exports.selection = selection;
                    exports.selector = selector;
                    exports.selectorAll = selectorAll;
                    exports.touch = touch;
                    exports.touches = touches;
                    exports.window = window;
                    exports.customEvent = customEvent;
                    exports.arc = arc;
                    exports.area = area$2;
                    exports.line = line;
                    exports.pie = pie;
                    exports.radialArea = radialArea;
                    exports.radialLine = radialLine$1;
                    exports.symbol = symbol;
                    exports.symbols = symbols;
                    exports.symbolCircle = circle$2;
                    exports.symbolCross = cross$1;
                    exports.symbolDiamond = diamond;
                    exports.symbolSquare = square;
                    exports.symbolStar = star;
                    exports.symbolTriangle = triangle;
                    exports.symbolWye = wye;
                    exports.curveBasisClosed = basisClosed$1;
                    exports.curveBasisOpen = basisOpen;
                    exports.curveBasis = basis$2;
                    exports.curveBundle = bundle;
                    exports.curveCardinalClosed = cardinalClosed;
                    exports.curveCardinalOpen = cardinalOpen;
                    exports.curveCardinal = cardinal;
                    exports.curveCatmullRomClosed = catmullRomClosed;
                    exports.curveCatmullRomOpen = catmullRomOpen;
                    exports.curveCatmullRom = catmullRom;
                    exports.curveLinearClosed = linearClosed;
                    exports.curveLinear = curveLinear;
                    exports.curveMonotoneX = monotoneX;
                    exports.curveMonotoneY = monotoneY;
                    exports.curveNatural = natural;
                    exports.curveStep = step;
                    exports.curveStepAfter = stepAfter;
                    exports.curveStepBefore = stepBefore;
                    exports.stack = stack;
                    exports.stackOffsetExpand = expand;
                    exports.stackOffsetNone = none$1;
                    exports.stackOffsetSilhouette = silhouette;
                    exports.stackOffsetWiggle = wiggle;
                    exports.stackOrderAscending = ascending$2;
                    exports.stackOrderDescending = descending$2;
                    exports.stackOrderInsideOut = insideOut;
                    exports.stackOrderNone = none$2;
                    exports.stackOrderReverse = reverse;
                    exports.timeInterval = newInterval;
                    exports.timeMillisecond = millisecond;
                    exports.timeMilliseconds = milliseconds;
                    exports.utcMillisecond = millisecond;
                    exports.utcMilliseconds = milliseconds;
                    exports.timeSecond = second;
                    exports.timeSeconds = seconds;
                    exports.utcSecond = second;
                    exports.utcSeconds = seconds;
                    exports.timeMinute = minute;
                    exports.timeMinutes = minutes;
                    exports.timeHour = hour;
                    exports.timeHours = hours;
                    exports.timeDay = day;
                    exports.timeDays = days;
                    exports.timeWeek = sunday;
                    exports.timeWeeks = sundays;
                    exports.timeSunday = sunday;
                    exports.timeSundays = sundays;
                    exports.timeMonday = monday;
                    exports.timeMondays = mondays;
                    exports.timeTuesday = tuesday;
                    exports.timeTuesdays = tuesdays;
                    exports.timeWednesday = wednesday;
                    exports.timeWednesdays = wednesdays;
                    exports.timeThursday = thursday;
                    exports.timeThursdays = thursdays;
                    exports.timeFriday = friday;
                    exports.timeFridays = fridays;
                    exports.timeSaturday = saturday;
                    exports.timeSaturdays = saturdays;
                    exports.timeMonth = month;
                    exports.timeMonths = months;
                    exports.timeYear = year;
                    exports.timeYears = years;
                    exports.utcMinute = utcMinute;
                    exports.utcMinutes = utcMinutes;
                    exports.utcHour = utcHour;
                    exports.utcHours = utcHours;
                    exports.utcDay = utcDay;
                    exports.utcDays = utcDays;
                    exports.utcWeek = utcSunday;
                    exports.utcWeeks = utcSundays;
                    exports.utcSunday = utcSunday;
                    exports.utcSundays = utcSundays;
                    exports.utcMonday = utcMonday;
                    exports.utcMondays = utcMondays;
                    exports.utcTuesday = utcTuesday;
                    exports.utcTuesdays = utcTuesdays;
                    exports.utcWednesday = utcWednesday;
                    exports.utcWednesdays = utcWednesdays;
                    exports.utcThursday = utcThursday;
                    exports.utcThursdays = utcThursdays;
                    exports.utcFriday = utcFriday;
                    exports.utcFridays = utcFridays;
                    exports.utcSaturday = utcSaturday;
                    exports.utcSaturdays = utcSaturdays;
                    exports.utcMonth = utcMonth;
                    exports.utcMonths = utcMonths;
                    exports.utcYear = utcYear;
                    exports.utcYears = utcYears;
                    exports.timeFormatDefaultLocale = defaultLocale$1;
                    exports.timeFormatLocale = formatLocale$1;
                    exports.isoFormat = formatIso;
                    exports.isoParse = parseIso;
                    exports.now = now;
                    exports.timer = timer;
                    exports.timerFlush = timerFlush;
                    exports.timeout = timeout$1;
                    exports.interval = interval$1;
                    exports.transition = transition;
                    exports.active = active;
                    exports.interrupt = interrupt;
                    exports.voronoi = voronoi;
                    exports.zoom = zoom;
                    exports.zoomTransform = transform$1;
                    exports.zoomIdentity = identity$8;

                    Object.defineProperty(exports, '__esModule', { value: true });

                })));


                /***/
            }),
            /* 45 */
            /***/
            (function(module, exports, __webpack_require__) {

                module.exports = __webpack_require__(137);


                /***/
            }),
            /* 46 */
            /***/
            (function(module, exports) {

                var g;

                // This works in non-strict mode
                g = (function() {
                    return this;
                })();

                try {
                    // This works if eval is allowed (see CSP)
                    g = g || Function("return this")() || (1, eval)("this");
                } catch (e) {
                    // This works if the window reference is available
                    if (typeof window === "object")
                        g = window;
                }

                // g can still be undefined, but nothing to do about it...
                // We return undefined, instead of nothing here, so it's
                // easier to handle this case. if(!global) { ...}

                module.exports = g;


                /***/
            }),
            /* 47 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });

                var _createClass = function() {
                    function defineProperties(target, props) {
                        for (var i = 0; i < props.length; i++) {
                            var descriptor = props[i];
                            descriptor.enumerable = descriptor.enumerable || false;
                            descriptor.configurable = true;
                            if ("value" in descriptor) descriptor.writable = true;
                            Object.defineProperty(target, descriptor.key, descriptor);
                        }
                    }
                    return function(Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; };
                }();

                var _SentenTreeModel = __webpack_require__(23);

                var _SentenTreeModel2 = _interopRequireDefault(_SentenTreeModel);

                var _TokenizedDataset = __webpack_require__(52);

                var _TokenizedDataset2 = _interopRequireDefault(_TokenizedDataset);

                var _WordFilter = __webpack_require__(24);

                var _WordFilter2 = _interopRequireDefault(_WordFilter);

                var _tokenize = __webpack_require__(25);

                function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

                function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

                var identity = function identity(x) {
                    return x;
                };

                var SentenTreeBuilder = function() {
                    function SentenTreeBuilder() {
                        _classCallCheck(this, SentenTreeBuilder);

                        this._tokenize = _tokenize.tokenize;
                        this._transformToken = identity;
                        var filter = _WordFilter2.default.getDefault();
                        this._filterToken = function(token) {
                            return !filter.test(token);
                        };
                    }

                    _createClass(SentenTreeBuilder, [{
                        key: 'tokenize',
                        value: function tokenize() {
                            if (arguments.length === 0) return this._tokenize;
                            this._tokenize = arguments.length <= 0 ? undefined : arguments[0];
                            return this;
                        }
                    }, {
                        key: 'transformToken',
                        value: function transformToken() {
                            if (arguments.length === 0) return this._transformToken;
                            this._transformToken = arguments.length <= 0 ? undefined : arguments[0];
                            return this;
                        }
                    }, {
                        key: 'filterToken',
                        value: function filterToken() {
                            if (arguments.length === 0) return this._filterToken;
                            this._filterToken = arguments.length <= 0 ? undefined : arguments[0];
                            return this;
                        }
                    }, {
                        key: 'buildTokenizedDataset',
                        value: function buildTokenizedDataset(entries) {
                            var _this = this;

                            var tokenizedEntries = entries.map(function(entry) {
                                return {
                                    id: entry.id,
                                    count: entry.count || 1,
                                    tokens: _this._tokenize(entry.text).map(_this._transformToken).filter(_this._filterToken),
                                    rawText: entry.text
                                };
                            }).filter(function(entry) {
                                return entry.tokens.length > 0;
                            });
                            return new _TokenizedDataset2.default(tokenizedEntries);
                        }
                    }, {
                        key: 'buildModel',
                        value: function buildModel(entries, options) {
                            return new _SentenTreeModel2.default(this.buildTokenizedDataset(entries), options);
                        }
                    }]);

                    return SentenTreeBuilder;
                }();

                exports.default = SentenTreeBuilder;

                /***/
            }),
            /* 48 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });

                var _createClass = function() {
                    function defineProperties(target, props) {
                        for (var i = 0; i < props.length; i++) {
                            var descriptor = props[i];
                            descriptor.enumerable = descriptor.enumerable || false;
                            descriptor.configurable = true;
                            if ("value" in descriptor) descriptor.writable = true;
                            Object.defineProperty(target, descriptor.key, descriptor);
                        }
                    }
                    return function(Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; };
                }();

                var _get = function get(object, property, receiver) { if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { return get(parent, property, receiver); } } else if ("value" in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } };

                __webpack_require__(115);

                var _d = __webpack_require__(44);

                var d3 = _interopRequireWildcard(_d);

                var _d3kit = __webpack_require__(136);

                var _lodash = __webpack_require__(5);

                var _Layout = __webpack_require__(53);

                var _Layout2 = _interopRequireDefault(_Layout);

                var _shapeUtil = __webpack_require__(54);

                function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

                function _interopRequireWildcard(obj) {
                    if (obj && obj.__esModule) { return obj; } else {
                        var newObj = {};
                        if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } }
                        newObj.default = obj;
                        return newObj;
                    }
                }

                function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

                function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

                function _inherits(subClass, superClass) {
                    if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); }
                    subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } });
                    if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
                }

                var SentenTreeVis = function(_SvgChart) {
                    _inherits(SentenTreeVis, _SvgChart);

                    _createClass(SentenTreeVis, null, [{
                        key: 'getDefaultOptions',
                        value: function getDefaultOptions() {
                            return _d3kit.helper.deepExtend(_get(SentenTreeVis.__proto__ || Object.getPrototypeOf(SentenTreeVis), 'getDefaultOptions', this).call(this), {
                                initialWidth: 800,
                                initialHeight: 200,
                                margin: { left: 0, top: 0, bottom: 0, right: 0 },
                                fontSize: [10, 32],
                                gapBetweenGraph: 10
                            });
                        }
                    }, {
                        key: 'getCustomEventNames',
                        value: function getCustomEventNames() {
                            return ['layoutStart', 'layoutTick', 'layoutEnd', 'nodeMouseenter', 'nodeMouseleave', 'nodeMousemove', 'nodeClick', 'linkMouseenter', 'linkMouseleave', 'linkMousemove', 'linkClick'];
                        }
                    }]);

                    function SentenTreeVis(element, options) {
                        _classCallCheck(this, SentenTreeVis);

                        var _this = _possibleConstructorReturn(this, (SentenTreeVis.__proto__ || Object.getPrototypeOf(SentenTreeVis)).call(this, element, options));

                        _this.layers.create(['link', 'node']);

                        _this.fontSizeScale = d3.scaleSqrt().clamp(true);
                        _this.strokeSizeScale = d3.scaleSqrt().domain([1, 100]).range([1, 6]).clamp(true);

                        _this.layouts = [];

                        _this.updatePosition = _this.updatePosition.bind(_this);
                        _this.visualize = _this.visualize.bind(_this);
                        _this.on('data', _this.visualize);
                        _this.on('options', _this.visualize);
                        // this.on('resize', this.visualize);
                        return _this;
                    }

                    _createClass(SentenTreeVis, [{
                        key: 'fontSize',
                        value: function fontSize(node) {
                            return Math.round(this.fontSizeScale(node.data.freq)) + 'px';
                        }
                    }, {
                        key: 'renderNodes',
                        value: function renderNodes(graphs) {
                            var _this2 = this;

                            var sUpdate = this.layers.get('node').selectAll('g.graph').data(graphs);

                            sUpdate.exit().remove();

                            var sEnter = sUpdate.enter().append('g').classed('graph', true);

                            this.sNodeGraphs = sUpdate.merge(sEnter).attr('transform', 'translate(' + this.getInnerWidth() / 2 + ',' + this.getInnerHeight() / 2 + ')');

                            var sUpdateNode = sEnter.selectAll('g').data(function(d) {
                                return d.nodes;
                            }, function(n) {
                                return n.id;
                            });

                            sUpdateNode.exit().remove();

                            sUpdateNode.enter().append('g')
                                .classed('node', true)
                                .on('click.event', this.dispatchAs('nodeClick'))
                                .on('mouseenter.event', this.dispatchAs('nodeMouseenter'))
                                .on('mousemove.event', this.dispatchAs('nodeMousemove'))
                                .on('mouseleave.event', this.dispatchAs('nodeMouseleave'))
                                .append('text').attr('dy', '.28em').text(function(d) {
                                    return d.data.entity;
                                }).style('cursor', 'pointer');

                            this.sNodes = this.layers.get('node').selectAll('g.node');

                            this.sNodes.select('text').style('font-size', function(d) {
                                return _this2.fontSize(d);
                            }).style('text-anchor', 'middle');
                        }
                    }, {
                        key: 'renderLinks',
                        value: function renderLinks(graphs) {
                            var _this3 = this;

                            var sUpdate = this.layers.get('link').selectAll('g.graph').data(graphs);

                            sUpdate.exit().remove();

                            var sEnter = sUpdate.enter().append('g').classed('graph', true);

                            this.sLinkGraphs = sUpdate.merge(sEnter).attr('transform', 'translate(' + this.getInnerWidth() / 2 + ',' + this.getInnerHeight() / 2 + ')');

                            var sUpdateLink = sEnter.selectAll('path.link').data(function(d) {
                                return d.links;
                            }, function(l) {
                                return l.getKey();
                            });

                            sUpdateLink.exit().remove();

                            sUpdateLink.enter().append('path').classed('link', true).on('click.event', this.dispatchAs('linkClick')).on('mouseenter.event', this.dispatchAs('linkMouseenter')).on('mousemove.event', this.dispatchAs('linkMousemove')).on('mouseleave.event', this.dispatchAs('linkMouseleave')).style('vector-effect', 'non-scaling-stroke').style('opacity', 0.5).style('stroke', '#222').style('fill', 'none');

                            graphs.forEach(function(graph) {
                                graph.links.forEach(function(link) {
                                    link.strokeWidth = Math.round(_this3.strokeSizeScale(link.freq / graph.minSupport));
                                });
                            });

                            this.sLinks = this.layers.get('link').selectAll('path.link').style('stroke-width', function(d) {
                                return d.strokeWidth + 'px';
                            }).style('stroke', function(l) {
                                return l.isTheOnlyBridge() ? '#777' : '#FF9800';
                            });
                        }
                    }, {
                        key: 'updatePosition',
                        value: function updatePosition() {
                            var yPos = 0;
                            var maxw = 0;

                            var _options = this.options(),
                                margin = _options.margin,
                                gapBetweenGraph = _options.gapBetweenGraph;

                            var top = margin.top,
                                left = margin.left,
                                bottom = margin.bottom,
                                right = margin.right;

                            // Get bbox of <g> for each graph to compute total dimension
                            // and stack each graph on top of each other

                            this.sNodeGraphs.each(function fn(graph) {
                                var bbox = this.getBBox();
                                var w = bbox.width;
                                var h = bbox.height;
                                maxw = Math.max(w, maxw);
                                graph.x = -bbox.x;
                                graph.y = -bbox.y + yPos;
                                yPos += h + gapBetweenGraph;
                            });

                            this.sNodeGraphs.attr('transform', function(graph) {
                                return 'translate(' + graph.x + ',' + graph.y + ')';
                            });

                            this.sLinkGraphs.attr('transform', function(graph) {
                                return 'translate(' + graph.x + ',' + graph.y + ')';
                            });

                            // Update component size to fit all content
                            this.dimension([maxw + left + right, Math.max(0, yPos - gapBetweenGraph) + top + bottom]);

                            this.placeNodes();
                            this.placeLinks();
                        }
                    }, {
                        key: 'placeNodes',
                        value: function placeNodes() {
                            this.sNodes.attr('transform', function(d) {
                                return 'translate(' + d.x + ', ' + d.y + ')';
                            });
                        }
                    }, {
                        key: 'placeLinks',
                        value: function placeLinks() {
                            // draw directed edges with proper padding from node centers
                            var graphs = this.data();

                            graphs.forEach(function(graph) {
                                graph.nodes.forEach(function(node) {
                                    node.updateAttachPoints();
                                });
                            });

                            this.sLinks.attr('d', function(link) {
                                var points = [link.source.rightEdge(), link.attachPoints.y1, link.target.leftEdge(), link.attachPoints.y2];
                                // const xGap = link.target.leftEdge() - link.source.rightEdge();
                                // if (xGap > 30) {
                                //   return line(...points);
                                // }
                                return _shapeUtil.diagonal.apply(undefined, points);
                            });
                        }
                    }, {
                        key: 'visualize',
                        value: function visualize() {
                            if (!this.hasData()) return;

                            var graphs = this.data();

                            if (graphs.length > 0) {
                                var _options2 = this.options(),
                                    fontSize = _options2.fontSize;

                                this.fontSizeScale.domain(graphs[0].globalFreqRange).range(fontSize);
                            }

                            this.linkLookup = (0, _lodash.keyBy)((0, _lodash.flatMap)(graphs, function(g) {
                                return g.links;
                            }), function(l) {
                                return [l.source.gid, l.target.gid].join(',');
                            });

                            this.renderNodes(graphs);
                            this.renderLinks(graphs);

                            // Update node position for layout computation
                            this.sNodes.each(function fn(node) {
                                var bbox = this.getBBox();
                                node.width = bbox.width + 4;
                                node.height = bbox.height + 4;
                            });

                            // Update layout pool
                            var len = Math.max(graphs.length, this.layouts.length);
                            for (var i = 0; i < len; i++) {
                                if (i >= this.layouts.length) {
                                    this.layouts.push(new _Layout2.default().on('tick', this.updatePosition));
                                }
                                if (i >= graphs.length) {
                                    this.layouts[i].stop().destroy();
                                    continue;
                                }
                                this.layouts[i].stop().setGraph(graphs[i]).start();
                            }
                            this.layouts = this.layouts.slice(0, graphs.length);

                            this.updatePosition();

                            // const colaAdaptor = this.colaAdaptor;

                            // this.sNodes.call(colaAdaptor.drag);
                            // this.sLinks.call(colaAdaptor.drag);

                            // this.colaAdaptor.on('tick', event => {
                            //   this.placeNodes();
                            //   this.placeLinks();
                            // });
                        }
                    }, {
                        key: 'highlightNeighbors',
                        value: function highlightNeighbors(node) {
                            var _this4 = this;

                            this.sNodes.transition().style('opacity', function(d) {
                                return d.gid === node.gid || _this4.linkLookup[[d.gid, node.gid].join(',')] || _this4.linkLookup[[node.gid, d.gid].join(',')] ? 1 : 0.3;
                            });

                            this.sLinks.transition().style('opacity', function(d) {
                                return d.source.gid === node.gid || d.target.gid === node.gid ? 1 : 0.3;
                            });
                        }
                    }, {
                        key: 'clearHighlightNeighbors',
                        value: function clearHighlightNeighbors() {
                            this.sNodes.transition().style('opacity', 1);
                            this.sLinks.transition().style('opacity', 0.3);
                        }
                    }]);

                    return SentenTreeVis;
                }(_d3kit.SvgChart);

                exports.default = SentenTreeVis;

                /***/
            }),
            /* 49 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });

                var _createClass = function() {
                    function defineProperties(target, props) {
                        for (var i = 0; i < props.length; i++) {
                            var descriptor = props[i];
                            descriptor.enumerable = descriptor.enumerable || false;
                            descriptor.configurable = true;
                            if ("value" in descriptor) descriptor.writable = true;
                            Object.defineProperty(target, descriptor.key, descriptor);
                        }
                    }
                    return function(Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; };
                }();

                var _lodash = __webpack_require__(5);

                var _heap = __webpack_require__(45);

                var _heap2 = _interopRequireDefault(_heap);

                var _Link = __webpack_require__(26);

                var _Link2 = _interopRequireDefault(_Link);

                var _Node = __webpack_require__(27);

                var _Node2 = _interopRequireDefault(_Node);

                function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

                function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

                var GraphBundler = function() {
                    function GraphBundler(nodes, links) {
                        _classCallCheck(this, GraphBundler);

                        this.nodes = nodes;
                        this.links = links;
                        this.linkLookup = (0, _lodash.keyBy)(this.links, function(l) {
                            return l.getKey();
                        });
                    }

                    _createClass(GraphBundler, [{
                        key: 'addLinks',
                        value: function addLinks(links) {
                            var _this = this;

                            this.links = this.links.concat(links);
                            links.forEach(function(link) {
                                _this.linkLookup[link.getKey()] = link;
                            });
                        }
                    }, {
                        key: 'bundle',
                        value: function bundle() {
                            var _this2 = this;

                            var heap = new _heap2.default(function(a, b) {
                                return a.data.id - b.data.id;
                            });

                            // Add candidate parents to heap
                            this.nodes.filter(function(n) {
                                return _this2.hasPotential(n);
                            }).forEach(function(n) {
                                heap.push(n);
                            });

                            let counter = 1;

                            while (heap.size() > 0) {
                                console.log(`in while ${counter++}`)
                                var parent = heap.pop();
                                console.log(heap)
                                if (parent.merged) {
                                    continue;
                                }

                                var groups = [];
                                console.log(parent.data.id)
                                if (parent.leftLinks.length > 1) {
                                    var lNodes = parent.leftLinks.map(function(l) {
                                        return l.source;
                                    });
                                    groups = groups.concat(this.groupMergeableNodes(lNodes));
                                }

                                if (parent.rightLinks.length > 1) {
                                    var rNodes = parent.rightLinks.map(function(l) {
                                        return l.target;
                                    });
                                    groups = groups.concat(this.groupMergeableNodes(rNodes));
                                }
                                console.log(groups)

                                if (groups.length > 0) {
                                    var newNodes = groups.map(function(group) {
                                        return _this2.mergeNodes(group);
                                    });
                                    newNodes.filter(function(n) {
                                        return _this2.hasPotential(n);
                                    }).forEach(function(n) {
                                        heap.push(n);
                                    });
                                }
                            }

                            return {
                                nodes: this.nodes.filter(function(n) {
                                    return !n.merged;
                                }),
                                links: this.links.filter(function(l) {
                                    return !l.source.merged && !l.target.merged;
                                })
                            };
                        }
                    }, {
                        key: 'groupMergeableNodes',
                        value: function groupMergeableNodes(nodes) {
                            var linkLookup = this.linkLookup;
                            return (0, _lodash.chain)(nodes).groupBy(function(n) {
                                return n.data.entity;
                            }).values().filter(function(g) {
                                return g.length > 1;
                            }).flatMap(function(g) {
                                var subgroups = [
                                    [g[0]]
                                ];

                                var _loop = function _loop(i) {
                                    var node = g[i];
                                    for (var j = 0; j < subgroups.length; j++) {
                                        var subgroup = subgroups[j];
                                        if (subgroup.every(function(n) {
                                                return !linkLookup[[n.id, node.id].join(',')] && !linkLookup[[n.id, node.id].join(',')];
                                            })) {
                                            subgroup.push(node);
                                            continue;
                                        }
                                        subgroups.push([node]);
                                    }
                                };

                                for (var i = 1; i < g.length; i++) {
                                    _loop(i);
                                }
                                return subgroups.filter(function(subgroup) {
                                    return subgroup.length > 1;
                                });
                            }).value();
                        }
                    }, {
                        key: 'hasPotential',
                        value: function hasPotential(node) {
                            return node.rightLinks.length > 1 || node.leftLinks.length > 1;
                        }
                    }, {
                        key: 'mergeNodes',
                        value: function mergeNodes(nodes) {
                            var newNode = _Node2.default.merge(nodes);
                            newNode.id = this.nodes.length;
                            this.nodes.push(newNode);
                            nodes.forEach(function(n) {
                                n.merged = true;
                            });

                            newNode.rightLinks = (0, _lodash.chain)(nodes).flatMap(function(n) {
                                return n.rightLinks;
                            }).groupBy(function(l) {
                                return l.target.id;
                            }).mapValues(function(links) {
                                var target = links[0].target;
                                target.leftLinks = target.leftLinks.filter(function(l) {
                                    return !l.source.merged;
                                });
                                var link = new _Link2.default(newNode, links[0].target, (0, _lodash.sum)(links.map(function(l) {
                                    return l.freq;
                                })));
                                target.leftLinks.push(link);
                                return link;
                            }).values().value();

                            this.addLinks(newNode.rightLinks);

                            newNode.leftLinks = (0, _lodash.chain)(nodes).flatMap(function(n) {
                                return n.leftLinks;
                            }).groupBy(function(l) {
                                return l.source.id;
                            }).mapValues(function(links) {
                                var source = links[0].source;
                                source.rightLinks = source.rightLinks.filter(function(l) {
                                    return !l.target.merged;
                                });
                                var link = new _Link2.default(links[0].source, newNode, (0, _lodash.sum)(links.map(function(l) {
                                    return l.freq;
                                })));
                                source.rightLinks.push(link);
                                return link;
                            }).values().value();

                            this.addLinks(newNode.leftLinks);

                            return newNode;
                        }
                    }]);

                    return GraphBundler;
                }();

                exports.default = GraphBundler;

                /***/
            }),
            /* 50 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });

                var _createClass = function() {
                    function defineProperties(target, props) {
                        for (var i = 0; i < props.length; i++) {
                            var descriptor = props[i];
                            descriptor.enumerable = descriptor.enumerable || false;
                            descriptor.configurable = true;
                            if ("value" in descriptor) descriptor.writable = true;
                            Object.defineProperty(target, descriptor.key, descriptor);
                        }
                    }
                    return function(Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; };
                }();

                var _RenderedGraph = __webpack_require__(51);

                var _RenderedGraph2 = _interopRequireDefault(_RenderedGraph);

                function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

                function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

                var RawGraph = function() {
                    function RawGraph(minSupport, maxSupport) {
                        _classCallCheck(this, RawGraph);

                        this.nodes = [];
                        this.linkadj = [];
                        this.minSupport = minSupport;
                        this.maxSupport = maxSupport;
                        this.totalNodeCnt = 0;
                    }

                    _createClass(RawGraph, [{
                        key: 'clear',
                        value: function clear() {
                            this.nodes = [];
                            this.linkadj = [];
                            return this;
                        }
                    }, {
                        key: 'toRenderedGraph',
                        value: function toRenderedGraph() {
                            return new _RenderedGraph2.default(this);
                        }
                    }]);

                    return RawGraph;
                }();

                exports.default = RawGraph;

                /***/
            }),
            /* 51 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });

                var _createClass = function() {
                    function defineProperties(target, props) {
                        for (var i = 0; i < props.length; i++) {
                            var descriptor = props[i];
                            descriptor.enumerable = descriptor.enumerable || false;
                            descriptor.configurable = true;
                            if ("value" in descriptor) descriptor.writable = true;
                            Object.defineProperty(target, descriptor.key, descriptor);
                        }
                    }
                    return function(Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; };
                }();

                var _lodash = __webpack_require__(5);

                var _GraphBundler = __webpack_require__(49);

                var _GraphBundler2 = _interopRequireDefault(_GraphBundler);

                var _Link = __webpack_require__(26);

                var _Link2 = _interopRequireDefault(_Link);

                var _Node = __webpack_require__(27);

                var _Node2 = _interopRequireDefault(_Node);

                function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

                function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

                var RenderedGraph = function() {
                    function RenderedGraph(rawGraph) {
                        console.log(arguments)
                        var _ref = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
                            _ref$bundle = _ref.bundle,
                            bundle = _ref$bundle === undefined ? true : _ref$bundle,
                            _ref$highFrequencyOnT = _ref.highFrequencyOnTop,
                            highFrequencyOnTop = _ref$highFrequencyOnT === undefined ? true : _ref$highFrequencyOnT;

                        _classCallCheck(this, RenderedGraph);

                        this.options = { bundle: bundle, highFrequencyOnTop: highFrequencyOnTop };

                        this.minSupport = rawGraph.minSupport;
                        this.maxSupport = rawGraph.maxSupport;

                        var nodes = rawGraph.nodes.map(function(n) {
                            return new _Node2.default(n);
                        });
                        var links = [];

                        Object.keys(rawGraph.linkadj).forEach(function(l) {
                            var leftNode = nodes[l];
                            var rights = rawGraph.linkadj[l];
                            Object.keys(rights).forEach(function(r) {
                                var rightNode = nodes[r];
                                var link = new _Link2.default(leftNode, rightNode, rights[r]);
                                links.push(link);
                                leftNode.rightLinks.push(link);
                                rightNode.leftLinks.push(link);
                            });
                        });

                        this.assignNodeIds(nodes);

                        console.log(bundle)
                        if (bundle) {
                            var bundled = new _GraphBundler2.default(nodes, links).bundle();
                            console.log(bundled)
                            this.nodes = bundled.nodes;
                            this.links = bundled.links;
                            this.assignNodeIds(this.nodes);
                        } else {
                            this.nodes = nodes;
                            this.links = links;
                        }
                        this.linkLookup = (0, _lodash.keyBy)(this.links, function(l) {
                            return l.getKey();
                        });

                        if (highFrequencyOnTop) {
                            this.nodes.forEach(function(n) {
                                n.rightLinks.sort(function(a, b) {
                                    return b.freq - a.freq;
                                });
                                n.leftLinks.sort(function(a, b) {
                                    return b.freq - a.freq;
                                });
                            });
                        }

                        var frequencies = this.nodes.map(function(n) {
                            return n.data.freq;
                        });
                        this.freqRange = [(0, _lodash.min)(frequencies), (0, _lodash.max)(frequencies)];
                        this.globalFreqRange = this.freqRange;

                        var onlyBridgeConstraints = this.links.filter(function(link) {
                            return link.isTheOnlyBridge();
                        }).map(function(link) {
                            return link.toOnlyBridgeConstraint();
                        });

                        this.baseConstraints = onlyBridgeConstraints.concat(this.getAlignmentConstraints());
                    }

                    _createClass(RenderedGraph, [{
                        key: 'updateNodeSize',
                        value: function updateNodeSize(sizeFn) {
                            this.nodes.forEach(function(node) {
                                var _sizeFn = sizeFn(node),
                                    width = _sizeFn.width,
                                    height = _sizeFn.height;

                                node.width = width;
                                node.height = height;
                            });
                            return this;
                        }
                    }, {
                        key: 'assignNodeIds',
                        value: function assignNodeIds(nodes) {
                            var startIndex = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;

                            nodes.forEach(function(n, i) {
                                n.id = i + startIndex;
                            });
                            return this;
                        }
                    }, {
                        key: 'getAlignmentConstraints',
                        value: function getAlignmentConstraints() {
                            var alignmentConstraints = [];

                            if (this.nodes.length > 0) {
                                var visitedNodes = this.nodes.map(function() {
                                    return false;
                                });
                                var queue = [this.nodes[0]];
                                while (queue.length > 0) {
                                    var node = queue.shift();
                                    var nodeIndex = node.id;
                                    if (visitedNodes[nodeIndex]) continue;
                                    visitedNodes[nodeIndex] = true;
                                    var constraints = node.computeRightConstraints();
                                    if (constraints) {
                                        alignmentConstraints.push(constraints);
                                    }
                                    var rNodes = node.getRightNodes();
                                    if (rNodes.length > 0) {
                                        queue = queue.concat(rNodes);
                                    }
                                }

                                for (var i = 0; i < this.nodes.length; i++) {
                                    visitedNodes[i] = false;
                                }
                                queue = [this.nodes[0]];

                                while (queue.length > 0) {
                                    var _node = queue.shift();
                                    var _nodeIndex = _node.id;
                                    if (visitedNodes[_nodeIndex]) continue;
                                    visitedNodes[_nodeIndex] = true;
                                    var _constraints = _node.computeLeftConstraints();
                                    if (_constraints) {
                                        alignmentConstraints.push(_constraints);
                                    }
                                    var lNodes = _node.getLeftNodes();
                                    if (lNodes.length > 0) {
                                        queue = queue.concat(lNodes);
                                    }
                                }
                            }

                            return alignmentConstraints;
                        }
                    }, {
                        key: 'getLinkConstraints',
                        value: function getLinkConstraints() {
                            return this.links.map(function(l) {
                                return l.toConstraint();
                            });
                        }
                    }, {
                        key: 'getConstraints',
                        value: function getConstraints() {
                            var constraints = this.baseConstraints.concat(this.links.map(function(l) {
                                return l.toConstraint();
                            }));

                            return this.options.highFrequencyOnTop ? constraints.concat((0, _lodash.flatMap)(this.nodes, function(n) {
                                return n.computeOrderConstraints();
                            })) : constraints;
                        }
                    }, {
                        key: 'toGroupConstraint',
                        value: function toGroupConstraint() {
                            return {
                                leaves: this.nodes.map(function(n) {
                                    return n.id;
                                })
                            };
                        }
                    }]);

                    return RenderedGraph;
                }();

                exports.default = RenderedGraph;

                /***/
            }),
            /* 52 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });

                var _createClass = function() {
                    function defineProperties(target, props) {
                        for (var i = 0; i < props.length; i++) {
                            var descriptor = props[i];
                            descriptor.enumerable = descriptor.enumerable || false;
                            descriptor.configurable = true;
                            if ("value" in descriptor) descriptor.writable = true;
                            Object.defineProperty(target, descriptor.key, descriptor);
                        }
                    }
                    return function(Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; };
                }();

                var _lodash = __webpack_require__(5);

                function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

                var TokenizedDataset = function() {
                    function TokenizedDataset() {
                        var _this = this;

                        var entries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
                        _classCallCheck(this, TokenizedDataset);

                        this.vocabularies = {};
                        this.itemset = [];
                        this.entries = entries.map(function(_ref) {
                            var id = _ref.id,
                                count = _ref.count,
                                tokens = _ref.tokens,
                                rawText = _ref.rawText;
                            return {
                                id: id,
                                count: count,
                                tokens: tokens.map(function(t) {
                                    return _this.encode(t);
                                }),
                                rawText: rawText,
                                seqIndices: []
                            };
                        });
                    }

                    _createClass(TokenizedDataset, [{
                        key: 'hasToken',
                        value: function hasToken(token) {
                            return this.vocabularies.hasOwnProperty(token);
                        }
                    }, {
                        key: 'hasCode',
                        value: function hasCode(code) {
                            return code >= 0 && code < this.itemset.length;
                        }
                    }, {
                        key: 'getCode',
                        value: function getCode(token) {
                            return this.vocabularies[token];
                        }
                    }, {
                        key: 'encode',
                        value: function encode(token) {
                            if (this.vocabularies.hasOwnProperty(token)) {
                                return this.vocabularies[token];
                            }
                            var code = this.itemset.length;
                            this.itemset.push(token);
                            this.vocabularies[token] = code;
                            return code;
                        }
                    }, {
                        key: 'decode',
                        value: function decode(code) {
                            return this.itemset[code];
                        }
                    }, {
                        key: 'encodeTermWeights',
                        value: function encodeTermWeights() {
                            var _this2 = this;

                            var termWeights = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

                            return Object.keys(termWeights).filter(function(key) {
                                return _this2.hasToken(key);
                            }).reduce(function(acc, key) {
                                acc[_this2.getCode(key)] = termWeights[key];
                                return acc;
                            }, {});
                        }
                    }, {
                        key: 'computeSize',
                        value: function computeSize() {
                            return (0, _lodash.sum)(this.entries.map(function(e) {
                                return e.count;
                            }));
                        }
                    }]);

                    return TokenizedDataset;
                }();

                exports.default = TokenizedDataset;

                /***/
            }),
            /* 53 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });

                var _createClass = function() {
                    function defineProperties(target, props) {
                        for (var i = 0; i < props.length; i++) {
                            var descriptor = props[i];
                            descriptor.enumerable = descriptor.enumerable || false;
                            descriptor.configurable = true;
                            if ("value" in descriptor) descriptor.writable = true;
                            Object.defineProperty(target, descriptor.key, descriptor);
                        }
                    }
                    return function(Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; };
                }();

                var _d = __webpack_require__(44);

                var d3 = _interopRequireWildcard(_d);

                var _cola = __webpack_require__(138);

                function _interopRequireWildcard(obj) {
                    if (obj && obj.__esModule) { return obj; } else {
                        var newObj = {};
                        if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } }
                        newObj.default = obj;
                        return newObj;
                    }
                }

                function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

                var Layout = function() {
                    function Layout() {
                        var _this = this;

                        _classCallCheck(this, Layout);

                        this.isRunning = false;
                        this.simulation = (0, _cola.d3adaptor)(d3).flowLayout('x', 5).avoidOverlaps(true)
                            // .symmetricDiffLinkLengths(5)
                            .jaccardLinkLengths(10).linkDistance(5);

                        this.dispatcher = d3.dispatch('start', 'tick', 'end');

                        this.simulation.on('start.default', function() {
                            _this.isRunning = true;
                            _this.dispatcher.call('start', _this);
                        });

                        this.simulation.on('tick.default', function() {
                            _this.dispatcher.call('tick', _this);
                        });

                        this.simulation.on('end.default', function() {
                            if (_this.isRunning) {
                                _this.isRunning = false;
                                _this.dispatcher.call('end', _this);
                            }
                        });
                    }

                    _createClass(Layout, [{
                        key: 'on',
                        value: function on() {
                            var _dispatcher;

                            (_dispatcher = this.dispatcher).on.apply(_dispatcher, arguments);
                            return this;
                        }
                    }, {
                        key: 'setGraph',
                        value: function setGraph(graph) {
                            this.simulation.nodes(graph.nodes).links(graph.links).constraints(graph.getConstraints());

                            return this;
                        }
                    }, {
                        key: 'start',
                        value: function start() {
                            this.simulation.start(10, 10, 10);
                            return this;
                        }
                    }, {
                        key: 'stop',
                        value: function stop() {
                            this.simulation.stop();
                            return this;
                        }
                    }, {
                        key: 'destroy',
                        value: function destroy() {
                            this.dispatcher.on('start', null);
                            this.dispatcher.on('tick', null);
                            this.dispatcher.on('end', null);
                            this.simulation.on('start', null);
                            this.simulation.on('tick', null);
                            this.simulation.on('end', null);
                            return this;
                        }
                    }]);

                    return Layout;
                }();

                exports.default = Layout;

                /***/
            }),
            /* 54 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });
                exports.diagonal = diagonal;
                exports.line = line;

                function diagonal(x1, y1, x2, y2) {
                    return 'M' + x1 + ',' + y1 + 'C' + (x1 + x2) / 2 + ',' + y1 + ' ' + (x1 + x2) / 2 + ',' + y2 + ' ' + x2 + ',' + y2;
                }

                function line(x1, y1, x2, y2) {
                    return 'M ' + x1 + ',' + y1 + ' L ' + x2 + ',' + y2;
                }

                /***/
            }),
            /* 55 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__define__ = __webpack_require__(10);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__color__ = __webpack_require__(9);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__math__ = __webpack_require__(28);
                /* harmony export (immutable) */
                __webpack_exports__["a"] = cubehelix;
                /* unused harmony export Cubehelix */




                var A = -0.14861,
                    B = +1.78277,
                    C = -0.29227,
                    D = -0.90649,
                    E = +1.97294,
                    ED = E * D,
                    EB = E * B,
                    BC_DA = B * C - D * A;

                function cubehelixConvert(o) {
                    if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
                    if (!(o instanceof __WEBPACK_IMPORTED_MODULE_1__color__["b" /* Rgb */ ])) o = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["c" /* rgbConvert */ ])(o);
                    var r = o.r / 255,
                        g = o.g / 255,
                        b = o.b / 255,
                        l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),
                        bl = b - l,
                        k = (E * (g - l) - C * bl) / D,
                        s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1
                        h = s ? Math.atan2(k, bl) * __WEBPACK_IMPORTED_MODULE_2__math__["a" /* rad2deg */ ] - 120 : NaN;
                    return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);
                }

                function cubehelix(h, s, l, opacity) {
                    return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);
                }

                function Cubehelix(h, s, l, opacity) {
                    this.h = +h;
                    this.s = +s;
                    this.l = +l;
                    this.opacity = +opacity;
                }

                __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__define__["a" /* default */ ])(Cubehelix, cubehelix, __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__define__["b" /* extend */ ])(__WEBPACK_IMPORTED_MODULE_1__color__["d" /* Color */ ], {
                    brighter: function(k) {
                        k = k == null ? __WEBPACK_IMPORTED_MODULE_1__color__["e" /* brighter */ ] : Math.pow(__WEBPACK_IMPORTED_MODULE_1__color__["e" /* brighter */ ], k);
                        return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
                    },
                    darker: function(k) {
                        k = k == null ? __WEBPACK_IMPORTED_MODULE_1__color__["f" /* darker */ ] : Math.pow(__WEBPACK_IMPORTED_MODULE_1__color__["f" /* darker */ ], k);
                        return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
                    },
                    rgb: function() {
                        var h = isNaN(this.h) ? 0 : (this.h + 120) * __WEBPACK_IMPORTED_MODULE_2__math__["b" /* deg2rad */ ],
                            l = +this.l,
                            a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
                            cosh = Math.cos(h),
                            sinh = Math.sin(h);
                        return new __WEBPACK_IMPORTED_MODULE_1__color__["b" /* Rgb */ ](
                            255 * (l + a * (A * cosh + B * sinh)),
                            255 * (l + a * (C * cosh + D * sinh)),
                            255 * (l + a * (E * cosh)),
                            this.opacity
                        );
                    }
                }));


                /***/
            }),
            /* 56 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__define__ = __webpack_require__(10);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__color__ = __webpack_require__(9);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__math__ = __webpack_require__(28);
                /* harmony export (immutable) */
                __webpack_exports__["b"] = lab;
                /* unused harmony export Lab */
                /* harmony export (immutable) */
                __webpack_exports__["a"] = hcl;
                /* unused harmony export Hcl */




                var Kn = 18,
                    Xn = 0.950470, // D65 standard referent
                    Yn = 1,
                    Zn = 1.088830,
                    t0 = 4 / 29,
                    t1 = 6 / 29,
                    t2 = 3 * t1 * t1,
                    t3 = t1 * t1 * t1;

                function labConvert(o) {
                    if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
                    if (o instanceof Hcl) {
                        var h = o.h * __WEBPACK_IMPORTED_MODULE_2__math__["b" /* deg2rad */ ];
                        return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
                    }
                    if (!(o instanceof __WEBPACK_IMPORTED_MODULE_1__color__["b" /* Rgb */ ])) o = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["c" /* rgbConvert */ ])(o);
                    var b = rgb2xyz(o.r),
                        a = rgb2xyz(o.g),
                        l = rgb2xyz(o.b),
                        x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn),
                        y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn),
                        z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn);
                    return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
                }

                function lab(l, a, b, opacity) {
                    return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);
                }

                function Lab(l, a, b, opacity) {
                    this.l = +l;
                    this.a = +a;
                    this.b = +b;
                    this.opacity = +opacity;
                }

                __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__define__["a" /* default */ ])(Lab, lab, __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__define__["b" /* extend */ ])(__WEBPACK_IMPORTED_MODULE_1__color__["d" /* Color */ ], {
                    brighter: function(k) {
                        return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
                    },
                    darker: function(k) {
                        return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
                    },
                    rgb: function() {
                        var y = (this.l + 16) / 116,
                            x = isNaN(this.a) ? y : y + this.a / 500,
                            z = isNaN(this.b) ? y : y - this.b / 200;
                        y = Yn * lab2xyz(y);
                        x = Xn * lab2xyz(x);
                        z = Zn * lab2xyz(z);
                        return new __WEBPACK_IMPORTED_MODULE_1__color__["b" /* Rgb */ ](
                            xyz2rgb(3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB
                            xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z),
                            xyz2rgb(0.0556434 * x - 0.2040259 * y + 1.0572252 * z),
                            this.opacity
                        );
                    }
                }));

                function xyz2lab(t) {
                    return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;
                }

                function lab2xyz(t) {
                    return t > t1 ? t * t * t : t2 * (t - t0);
                }

                function xyz2rgb(x) {
                    return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
                }

                function rgb2xyz(x) {
                    return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
                }

                function hclConvert(o) {
                    if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
                    if (!(o instanceof Lab)) o = labConvert(o);
                    var h = Math.atan2(o.b, o.a) * __WEBPACK_IMPORTED_MODULE_2__math__["a" /* rad2deg */ ];
                    return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
                }

                function hcl(h, c, l, opacity) {
                    return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
                }

                function Hcl(h, c, l, opacity) {
                    this.h = +h;
                    this.c = +c;
                    this.l = +l;
                    this.opacity = +opacity;
                }

                __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__define__["a" /* default */ ])(Hcl, hcl, __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__define__["b" /* extend */ ])(__WEBPACK_IMPORTED_MODULE_1__color__["d" /* Color */ ], {
                    brighter: function(k) {
                        return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity);
                    },
                    darker: function(k) {
                        return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity);
                    },
                    rgb: function() {
                        return labConvert(this).rgb();
                    }
                }));


                /***/
            }),
            /* 57 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                var noop = { value: function() {} };

                function dispatch() {
                    for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
                        if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
                        _[t] = [];
                    }
                    return new Dispatch(_);
                }

                function Dispatch(_) {
                    this._ = _;
                }

                function parseTypenames(typenames, types) {
                    return typenames.trim().split(/^|\s+/).map(function(t) {
                        var name = "",
                            i = t.indexOf(".");
                        if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
                        if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
                        return { type: t, name: name };
                    });
                }

                Dispatch.prototype = dispatch.prototype = {
                    constructor: Dispatch,
                    on: function(typename, callback) {
                        var _ = this._,
                            T = parseTypenames(typename + "", _),
                            t,
                            i = -1,
                            n = T.length;

                        // If no callback was specified, return the callback of the given type and name.
                        if (arguments.length < 2) {
                            while (++i < n)
                                if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
                            return;
                        }

                        // If a type was specified, set the callback for the given type and name.
                        // Otherwise, if a null callback was specified, remove callbacks of the given name.
                        if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
                        while (++i < n) {
                            if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);
                            else if (callback == null)
                                for (t in _) _[t] = set(_[t], typename.name, null);
                        }

                        return this;
                    },
                    copy: function() {
                        var copy = {},
                            _ = this._;
                        for (var t in _) copy[t] = _[t].slice();
                        return new Dispatch(copy);
                    },
                    call: function(type, that) {
                        if ((n = arguments.length - 2) > 0)
                            for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
                        if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
                        for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
                    },
                    apply: function(type, that, args) {
                        if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
                        for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
                    }
                };

                function get(type, name) {
                    for (var i = 0, n = type.length, c; i < n; ++i) {
                        if ((c = type[i]).name === name) {
                            return c.value;
                        }
                    }
                }

                function set(type, name, callback) {
                    for (var i = 0, n = type.length; i < n; ++i) {
                        if (type[i].name === name) {
                            type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
                            break;
                        }
                    }
                    if (callback != null) type.push({ name: name, value: callback });
                    return type;
                }

                /* harmony default export */
                __webpack_exports__["a"] = dispatch;


                /***/
            }),
            /* 58 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__src_linear__ = __webpack_require__(65);
                /* unused harmony reexport easeLinear */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__src_quad__ = __webpack_require__(67);
                /* unused harmony reexport easeQuad */
                /* unused harmony reexport easeQuadIn */
                /* unused harmony reexport easeQuadOut */
                /* unused harmony reexport easeQuadInOut */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__src_cubic__ = __webpack_require__(62);
                /* unused harmony reexport easeCubic */
                /* unused harmony reexport easeCubicIn */
                /* unused harmony reexport easeCubicOut */
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "a", function() { return __WEBPACK_IMPORTED_MODULE_2__src_cubic__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_3__src_poly__ = __webpack_require__(66);
                /* unused harmony reexport easePoly */
                /* unused harmony reexport easePolyIn */
                /* unused harmony reexport easePolyOut */
                /* unused harmony reexport easePolyInOut */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_4__src_sin__ = __webpack_require__(68);
                /* unused harmony reexport easeSin */
                /* unused harmony reexport easeSinIn */
                /* unused harmony reexport easeSinOut */
                /* unused harmony reexport easeSinInOut */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_5__src_exp__ = __webpack_require__(64);
                /* unused harmony reexport easeExp */
                /* unused harmony reexport easeExpIn */
                /* unused harmony reexport easeExpOut */
                /* unused harmony reexport easeExpInOut */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_6__src_circle__ = __webpack_require__(61);
                /* unused harmony reexport easeCircle */
                /* unused harmony reexport easeCircleIn */
                /* unused harmony reexport easeCircleOut */
                /* unused harmony reexport easeCircleInOut */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_7__src_bounce__ = __webpack_require__(60);
                /* unused harmony reexport easeBounce */
                /* unused harmony reexport easeBounceIn */
                /* unused harmony reexport easeBounceOut */
                /* unused harmony reexport easeBounceInOut */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_8__src_back__ = __webpack_require__(59);
                /* unused harmony reexport easeBack */
                /* unused harmony reexport easeBackIn */
                /* unused harmony reexport easeBackOut */
                /* unused harmony reexport easeBackInOut */
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_9__src_elastic__ = __webpack_require__(63);
                /* unused harmony reexport easeElastic */
                /* unused harmony reexport easeElasticIn */
                /* unused harmony reexport easeElasticOut */
                /* unused harmony reexport easeElasticInOut */





















                /***/
            }),
            /* 59 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony export backIn */
                /* unused harmony export backOut */
                /* unused harmony export backInOut */
                var overshoot = 1.70158;

                var backIn = (function custom(s) {
                    s = +s;

                    function backIn(t) {
                        return t * t * ((s + 1) * t - s);
                    }

                    backIn.overshoot = custom;

                    return backIn;
                })(overshoot);

                var backOut = (function custom(s) {
                    s = +s;

                    function backOut(t) {
                        return --t * t * ((s + 1) * t + s) + 1;
                    }

                    backOut.overshoot = custom;

                    return backOut;
                })(overshoot);

                var backInOut = (function custom(s) {
                    s = +s;

                    function backInOut(t) {
                        return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;
                    }

                    backInOut.overshoot = custom;

                    return backInOut;
                })(overshoot);


                /***/
            }),
            /* 60 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony export bounceIn */
                /* unused harmony export bounceOut */
                /* unused harmony export bounceInOut */
                var b1 = 4 / 11,
                    b2 = 6 / 11,
                    b3 = 8 / 11,
                    b4 = 3 / 4,
                    b5 = 9 / 11,
                    b6 = 10 / 11,
                    b7 = 15 / 16,
                    b8 = 21 / 22,
                    b9 = 63 / 64,
                    b0 = 1 / b1 / b1;

                function bounceIn(t) {
                    return 1 - bounceOut(1 - t);
                }

                function bounceOut(t) {
                    return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;
                }

                function bounceInOut(t) {
                    return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;
                }


                /***/
            }),
            /* 61 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony export circleIn */
                /* unused harmony export circleOut */
                /* unused harmony export circleInOut */
                function circleIn(t) {
                    return 1 - Math.sqrt(1 - t * t);
                }

                function circleOut(t) {
                    return Math.sqrt(1 - --t * t);
                }

                function circleInOut(t) {
                    return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;
                }


                /***/
            }),
            /* 62 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony export cubicIn */
                /* unused harmony export cubicOut */
                /* harmony export (immutable) */
                __webpack_exports__["a"] = cubicInOut;

                function cubicIn(t) {
                    return t * t * t;
                }

                function cubicOut(t) {
                    return --t * t * t + 1;
                }

                function cubicInOut(t) {
                    return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
                }


                /***/
            }),
            /* 63 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony export elasticIn */
                /* unused harmony export elasticOut */
                /* unused harmony export elasticInOut */
                var tau = 2 * Math.PI,
                    amplitude = 1,
                    period = 0.3;

                var elasticIn = (function custom(a, p) {
                    var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

                    function elasticIn(t) {
                        return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);
                    }

                    elasticIn.amplitude = function(a) { return custom(a, p * tau); };
                    elasticIn.period = function(p) { return custom(a, p); };

                    return elasticIn;
                })(amplitude, period);

                var elasticOut = (function custom(a, p) {
                    var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

                    function elasticOut(t) {
                        return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);
                    }

                    elasticOut.amplitude = function(a) { return custom(a, p * tau); };
                    elasticOut.period = function(p) { return custom(a, p); };

                    return elasticOut;
                })(amplitude, period);

                var elasticInOut = (function custom(a, p) {
                    var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

                    function elasticInOut(t) {
                        return ((t = t * 2 - 1) < 0 ?
                            a * Math.pow(2, 10 * t) * Math.sin((s - t) / p) :
                            2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;
                    }

                    elasticInOut.amplitude = function(a) { return custom(a, p * tau); };
                    elasticInOut.period = function(p) { return custom(a, p); };

                    return elasticInOut;
                })(amplitude, period);


                /***/
            }),
            /* 64 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony export expIn */
                /* unused harmony export expOut */
                /* unused harmony export expInOut */
                function expIn(t) {
                    return Math.pow(2, 10 * t - 10);
                }

                function expOut(t) {
                    return 1 - Math.pow(2, -10 * t);
                }

                function expInOut(t) {
                    return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;
                }


                /***/
            }),
            /* 65 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony export linear */
                function linear(t) {
                    return +t;
                }


                /***/
            }),
            /* 66 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony export polyIn */
                /* unused harmony export polyOut */
                /* unused harmony export polyInOut */
                var exponent = 3;

                var polyIn = (function custom(e) {
                    e = +e;

                    function polyIn(t) {
                        return Math.pow(t, e);
                    }

                    polyIn.exponent = custom;

                    return polyIn;
                })(exponent);

                var polyOut = (function custom(e) {
                    e = +e;

                    function polyOut(t) {
                        return 1 - Math.pow(1 - t, e);
                    }

                    polyOut.exponent = custom;

                    return polyOut;
                })(exponent);

                var polyInOut = (function custom(e) {
                    e = +e;

                    function polyInOut(t) {
                        return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;
                    }

                    polyInOut.exponent = custom;

                    return polyInOut;
                })(exponent);


                /***/
            }),
            /* 67 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony export quadIn */
                /* unused harmony export quadOut */
                /* unused harmony export quadInOut */
                function quadIn(t) {
                    return t * t;
                }

                function quadOut(t) {
                    return t * (2 - t);
                }

                function quadInOut(t) {
                    return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;
                }


                /***/
            }),
            /* 68 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony export sinIn */
                /* unused harmony export sinOut */
                /* unused harmony export sinInOut */
                var pi = Math.PI,
                    halfPi = pi / 2;

                function sinIn(t) {
                    return 1 - Math.cos(t * halfPi);
                }

                function sinOut(t) {
                    return Math.sin(t * halfPi);
                }

                function sinInOut(t) {
                    return (1 - Math.cos(pi * t)) / 2;
                }


                /***/
            }),
            /* 69 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_color__ = __webpack_require__(4);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__color__ = __webpack_require__(6);
                /* unused harmony export cubehelixLong */



                function cubehelix(hue) {
                    return (function cubehelixGamma(y) {
                        y = +y;

                        function cubehelix(start, end) {
                            var h = hue((start = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["b" /* cubehelix */ ])(start)).h, (end = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["b" /* cubehelix */ ])(end)).h),
                                s = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.s, end.s),
                                l = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.l, end.l),
                                opacity = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.opacity, end.opacity);
                            return function(t) {
                                start.h = h(t);
                                start.s = s(t);
                                start.l = l(Math.pow(t, y));
                                start.opacity = opacity(t);
                                return start + "";
                            };
                        }

                        cubehelix.gamma = cubehelixGamma;

                        return cubehelix;
                    })(1);
                }

                /* unused harmony default export */
                var _unused_webpack_default_export = cubehelix(__WEBPACK_IMPORTED_MODULE_1__color__["b" /* hue */ ]);
                var cubehelixLong = cubehelix(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ]);


                /***/
            }),
            /* 70 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_color__ = __webpack_require__(4);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__color__ = __webpack_require__(6);
                /* unused harmony export hclLong */



                function hcl(hue) {
                    return function(start, end) {
                        var h = hue((start = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["c" /* hcl */ ])(start)).h, (end = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["c" /* hcl */ ])(end)).h),
                            c = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.c, end.c),
                            l = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.l, end.l),
                            opacity = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.opacity, end.opacity);
                        return function(t) {
                            start.h = h(t);
                            start.c = c(t);
                            start.l = l(t);
                            start.opacity = opacity(t);
                            return start + "";
                        };
                    }
                }

                /* unused harmony default export */
                var _unused_webpack_default_export = hcl(__WEBPACK_IMPORTED_MODULE_1__color__["b" /* hue */ ]);
                var hclLong = hcl(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ]);


                /***/
            }),
            /* 71 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_color__ = __webpack_require__(4);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__color__ = __webpack_require__(6);
                /* unused harmony export hslLong */



                function hsl(hue) {
                    return function(start, end) {
                        var h = hue((start = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["e" /* hsl */ ])(start)).h, (end = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["e" /* hsl */ ])(end)).h),
                            s = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.s, end.s),
                            l = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.l, end.l),
                            opacity = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.opacity, end.opacity);
                        return function(t) {
                            start.h = h(t);
                            start.s = s(t);
                            start.l = l(t);
                            start.opacity = opacity(t);
                            return start + "";
                        };
                    }
                }

                /* unused harmony default export */
                var _unused_webpack_default_export = hsl(__WEBPACK_IMPORTED_MODULE_1__color__["b" /* hue */ ]);
                var hslLong = hsl(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ]);


                /***/
            }),
            /* 72 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_color__ = __webpack_require__(4);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__color__ = __webpack_require__(6);
                /* unused harmony export default */



                function lab(start, end) {
                    var l = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])((start = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["d" /* lab */ ])(start)).l, (end = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_color__["d" /* lab */ ])(end)).l),
                        a = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.a, end.a),
                        b = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.b, end.b),
                        opacity = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__color__["a" /* default */ ])(start.opacity, end.opacity);
                    return function(t) {
                        start.l = l(t);
                        start.a = a(t);
                        start.b = b(t);
                        start.opacity = opacity(t);
                        return start + "";
                    };
                }


                /***/
            }),
            /* 73 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony default export */
                var _unused_webpack_default_export = function(interpolator, n) {
                    var samples = new Array(n);
                    for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
                    return samples;
                };


                /***/
            }),
            /* 74 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* unused harmony default export */
                var _unused_webpack_default_export = function(a, b) {
                    return a = +a, b -= a,
                        function(t) {
                            return Math.round(a + b * t);
                        };
                };


                /***/
            }),
            /* 75 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "a", function() { return identity; });
                var degrees = 180 / Math.PI;

                var identity = {
                    translateX: 0,
                    translateY: 0,
                    rotate: 0,
                    skewX: 0,
                    scaleX: 1,
                    scaleY: 1
                };

                /* harmony default export */
                __webpack_exports__["b"] = function(a, b, c, d, e, f) {
                    var scaleX, scaleY, skewX;
                    if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
                    if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
                    if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
                    if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
                    return {
                        translateX: e,
                        translateY: f,
                        rotate: Math.atan2(b, a) * degrees,
                        skewX: Math.atan(skewX) * degrees,
                        scaleX: scaleX,
                        scaleY: scaleY
                    };
                };


                /***/
            }),
            /* 76 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__number__ = __webpack_require__(7);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__parse__ = __webpack_require__(77);
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "a", function() { return interpolateTransformCss; });
                /* harmony export (binding) */
                __webpack_require__.d(__webpack_exports__, "b", function() { return interpolateTransformSvg; });



                function interpolateTransform(parse, pxComma, pxParen, degParen) {

                    function pop(s) {
                        return s.length ? s.pop() + " " : "";
                    }

                    function translate(xa, ya, xb, yb, s, q) {
                        if (xa !== xb || ya !== yb) {
                            var i = s.push("translate(", null, pxComma, null, pxParen);
                            q.push({ i: i - 4, x: __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__number__["a" /* default */ ])(xa, xb) }, { i: i - 2, x: __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__number__["a" /* default */ ])(ya, yb) });
                        } else if (xb || yb) {
                            s.push("translate(" + xb + pxComma + yb + pxParen);
                        }
                    }

                    function rotate(a, b, s, q) {
                        if (a !== b) {
                            if (a - b > 180) b += 360;
                            else if (b - a > 180) a += 360; // shortest path
                            q.push({ i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__number__["a" /* default */ ])(a, b) });
                        } else if (b) {
                            s.push(pop(s) + "rotate(" + b + degParen);
                        }
                    }

                    function skewX(a, b, s, q) {
                        if (a !== b) {
                            q.push({ i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__number__["a" /* default */ ])(a, b) });
                        } else if (b) {
                            s.push(pop(s) + "skewX(" + b + degParen);
                        }
                    }

                    function scale(xa, ya, xb, yb, s, q) {
                        if (xa !== xb || ya !== yb) {
                            var i = s.push(pop(s) + "scale(", null, ",", null, ")");
                            q.push({ i: i - 4, x: __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__number__["a" /* default */ ])(xa, xb) }, { i: i - 2, x: __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__number__["a" /* default */ ])(ya, yb) });
                        } else if (xb !== 1 || yb !== 1) {
                            s.push(pop(s) + "scale(" + xb + "," + yb + ")");
                        }
                    }

                    return function(a, b) {
                        var s = [], // string constants and placeholders
                            q = []; // number interpolators
                        a = parse(a), b = parse(b);
                        translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
                        rotate(a.rotate, b.rotate, s, q);
                        skewX(a.skewX, b.skewX, s, q);
                        scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
                        a = b = null; // gc
                        return function(t) {
                            var i = -1,
                                n = q.length,
                                o;
                            while (++i < n) s[(o = q[i]).i] = o.x(t);
                            return s.join("");
                        };
                    };
                }

                var interpolateTransformCss = interpolateTransform(__WEBPACK_IMPORTED_MODULE_1__parse__["a" /* parseCss */ ], "px, ", "px)", "deg)");
                var interpolateTransformSvg = interpolateTransform(__WEBPACK_IMPORTED_MODULE_1__parse__["b" /* parseSvg */ ], ", ", ")", ")");


                /***/
            }),
            /* 77 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__decompose__ = __webpack_require__(75);
                /* harmony export (immutable) */
                __webpack_exports__["a"] = parseCss;
                /* harmony export (immutable) */
                __webpack_exports__["b"] = parseSvg;


                var cssNode,
                    cssRoot,
                    cssView,
                    svgNode;

                function parseCss(value) {
                    if (value === "none") return __WEBPACK_IMPORTED_MODULE_0__decompose__["a" /* identity */ ];
                    if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView;
                    cssNode.style.transform = value;
                    value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
                    cssRoot.removeChild(cssNode);
                    value = value.slice(7, -1).split(",");
                    return __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__decompose__["b" /* default */ ])(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
                }

                function parseSvg(value) {
                    if (value == null) return __WEBPACK_IMPORTED_MODULE_0__decompose__["a" /* identity */ ];
                    if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
                    svgNode.setAttribute("transform", value);
                    if (!(value = svgNode.transform.baseVal.consolidate())) return __WEBPACK_IMPORTED_MODULE_0__decompose__["a" /* identity */ ];
                    value = value.matrix;
                    return __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__decompose__["b" /* default */ ])(value.a, value.b, value.c, value.d, value.e, value.f);
                }


                /***/
            }),
            /* 78 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                var rho = Math.SQRT2,
                    rho2 = 2,
                    rho4 = 4,
                    epsilon2 = 1e-12;

                function cosh(x) {
                    return ((x = Math.exp(x)) + 1 / x) / 2;
                }

                function sinh(x) {
                    return ((x = Math.exp(x)) - 1 / x) / 2;
                }

                function tanh(x) {
                    return ((x = Math.exp(2 * x)) - 1) / (x + 1);
                }

                // p0 = [ux0, uy0, w0]
                // p1 = [ux1, uy1, w1]
                /* unused harmony default export */
                var _unused_webpack_default_export = function(p0, p1) {
                    var ux0 = p0[0],
                        uy0 = p0[1],
                        w0 = p0[2],
                        ux1 = p1[0],
                        uy1 = p1[1],
                        w1 = p1[2],
                        dx = ux1 - ux0,
                        dy = uy1 - uy0,
                        d2 = dx * dx + dy * dy,
                        i,
                        S;

                    // Special case for u0 ≅ u1.
                    if (d2 < epsilon2) {
                        S = Math.log(w1 / w0) / rho;
                        i = function(t) {
                            return [
                                ux0 + t * dx,
                                uy0 + t * dy,
                                w0 * Math.exp(rho * t * S)
                            ];
                        }
                    }

                    // General case.
                    else {
                        var d1 = Math.sqrt(d2),
                            b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
                            b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
                            r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
                            r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
                        S = (r1 - r0) / rho;
                        i = function(t) {
                            var s = t * S,
                                coshr0 = cosh(r0),
                                u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
                            return [
                                ux0 + u * dx,
                                uy0 + u * dy,
                                w0 * coshr0 / cosh(rho * s + r0)
                            ];
                        }
                    }

                    i.duration = S * 1000;

                    return i;
                };


                /***/
            }),
            /* 79 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function(x) {
                    return function() {
                        return x;
                    };
                };


                /***/
            }),
            /* 80 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony export (immutable) */
                __webpack_exports__["a"] = local;
                var nextId = 0;

                function local() {
                    return new Local;
                }

                function Local() {
                    this._ = "@" + (++nextId).toString(36);
                }

                Local.prototype = local.prototype = {
                    constructor: Local,
                    get: function(node) {
                        var id = this._;
                        while (!(id in node))
                            if (!(node = node.parentNode)) return;
                        return node[id];
                    },
                    set: function(node, value) {
                        return node[this._] = value;
                    },
                    remove: function(node) {
                        return this._ in node && delete node[this._];
                    },
                    toString: function() {
                        return this._;
                    }
                };


                /***/
            }),
            /* 81 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__sourceEvent__ = __webpack_require__(20);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__point__ = __webpack_require__(17);



                /* harmony default export */
                __webpack_exports__["a"] = function(node) {
                    var event = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__sourceEvent__["a" /* default */ ])();
                    if (event.changedTouches) event = event.changedTouches[0];
                    return __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__point__["a" /* default */ ])(node, event);
                };


                /***/
            }),
            /* 82 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__selection_index__ = __webpack_require__(0);


                /* harmony default export */
                __webpack_exports__["a"] = function(selector) {
                    return typeof selector === "string" ?
                        new __WEBPACK_IMPORTED_MODULE_0__selection_index__["b" /* Selection */ ]([
                            [document.querySelector(selector)]
                        ], [document.documentElement]) :
                        new __WEBPACK_IMPORTED_MODULE_0__selection_index__["b" /* Selection */ ]([
                            [selector]
                        ], __WEBPACK_IMPORTED_MODULE_0__selection_index__["c" /* root */ ]);
                };


                /***/
            }),
            /* 83 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__selection_index__ = __webpack_require__(0);


                /* harmony default export */
                __webpack_exports__["a"] = function(selector) {
                    return typeof selector === "string" ?
                        new __WEBPACK_IMPORTED_MODULE_0__selection_index__["b" /* Selection */ ]([document.querySelectorAll(selector)], [document.documentElement]) :
                        new __WEBPACK_IMPORTED_MODULE_0__selection_index__["b" /* Selection */ ]([selector == null ? [] : selector], __WEBPACK_IMPORTED_MODULE_0__selection_index__["c" /* root */ ]);
                };


                /***/
            }),
            /* 84 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__creator__ = __webpack_require__(14);


                /* harmony default export */
                __webpack_exports__["a"] = function(name) {
                    var create = typeof name === "function" ? name : __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__creator__["a" /* default */ ])(name);
                    return this.select(function() {
                        return this.appendChild(create.apply(this, arguments));
                    });
                };


                /***/
            }),
            /* 85 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__namespace__ = __webpack_require__(15);


                function attrRemove(name) {
                    return function() {
                        this.removeAttribute(name);
                    };
                }

                function attrRemoveNS(fullname) {
                    return function() {
                        this.removeAttributeNS(fullname.space, fullname.local);
                    };
                }

                function attrConstant(name, value) {
                    return function() {
                        this.setAttribute(name, value);
                    };
                }

                function attrConstantNS(fullname, value) {
                    return function() {
                        this.setAttributeNS(fullname.space, fullname.local, value);
                    };
                }

                function attrFunction(name, value) {
                    return function() {
                        var v = value.apply(this, arguments);
                        if (v == null) this.removeAttribute(name);
                        else this.setAttribute(name, v);
                    };
                }

                function attrFunctionNS(fullname, value) {
                    return function() {
                        var v = value.apply(this, arguments);
                        if (v == null) this.removeAttributeNS(fullname.space, fullname.local);
                        else this.setAttributeNS(fullname.space, fullname.local, v);
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name, value) {
                    var fullname = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__namespace__["a" /* default */ ])(name);

                    if (arguments.length < 2) {
                        var node = this.node();
                        return fullname.local ?
                            node.getAttributeNS(fullname.space, fullname.local) :
                            node.getAttribute(fullname);
                    }

                    return this.each((value == null ?
                        (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function" ?
                            (fullname.local ? attrFunctionNS : attrFunction) :
                            (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
                };


                /***/
            }),
            /* 86 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    var callback = arguments[0];
                    arguments[0] = this;
                    callback.apply(null, arguments);
                    return this;
                };


                /***/
            }),
            /* 87 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";

                function classArray(string) {
                    return string.trim().split(/^|\s+/);
                }

                function classList(node) {
                    return node.classList || new ClassList(node);
                }

                function ClassList(node) {
                    this._node = node;
                    this._names = classArray(node.getAttribute("class") || "");
                }

                ClassList.prototype = {
                    add: function(name) {
                        var i = this._names.indexOf(name);
                        if (i < 0) {
                            this._names.push(name);
                            this._node.setAttribute("class", this._names.join(" "));
                        }
                    },
                    remove: function(name) {
                        var i = this._names.indexOf(name);
                        if (i >= 0) {
                            this._names.splice(i, 1);
                            this._node.setAttribute("class", this._names.join(" "));
                        }
                    },
                    contains: function(name) {
                        return this._names.indexOf(name) >= 0;
                    }
                };

                function classedAdd(node, names) {
                    var list = classList(node),
                        i = -1,
                        n = names.length;
                    while (++i < n) list.add(names[i]);
                }

                function classedRemove(node, names) {
                    var list = classList(node),
                        i = -1,
                        n = names.length;
                    while (++i < n) list.remove(names[i]);
                }

                function classedTrue(names) {
                    return function() {
                        classedAdd(this, names);
                    };
                }

                function classedFalse(names) {
                    return function() {
                        classedRemove(this, names);
                    };
                }

                function classedFunction(names, value) {
                    return function() {
                        (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name, value) {
                    var names = classArray(name + "");

                    if (arguments.length < 2) {
                        var list = classList(this.node()),
                            i = -1,
                            n = names.length;
                        while (++i < n)
                            if (!list.contains(names[i])) return false;
                        return true;
                    }

                    return this.each((typeof value === "function" ?
                        classedFunction : value ?
                        classedTrue :
                        classedFalse)(names, value));
                };


                /***/
            }),
            /* 88 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__index__ = __webpack_require__(0);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__enter__ = __webpack_require__(38);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__constant__ = __webpack_require__(79);




                var keyPrefix = "$"; // Protect against keys like “__proto__”.

                function bindIndex(parent, group, enter, update, exit, data) {
                    var i = 0,
                        node,
                        groupLength = group.length,
                        dataLength = data.length;

                    // Put any non-null nodes that fit into update.
                    // Put any null nodes into enter.
                    // Put any remaining data into enter.
                    for (; i < dataLength; ++i) {
                        if (node = group[i]) {
                            node.__data__ = data[i];
                            update[i] = node;
                        } else {
                            enter[i] = new __WEBPACK_IMPORTED_MODULE_1__enter__["b" /* EnterNode */ ](parent, data[i]);
                        }
                    }

                    // Put any non-null nodes that don’t fit into exit.
                    for (; i < groupLength; ++i) {
                        if (node = group[i]) {
                            exit[i] = node;
                        }
                    }
                }

                function bindKey(parent, group, enter, update, exit, data, key) {
                    var i,
                        node,
                        nodeByKeyValue = {},
                        groupLength = group.length,
                        dataLength = data.length,
                        keyValues = new Array(groupLength),
                        keyValue;

                    // Compute the key for each node.
                    // If multiple nodes have the same key, the duplicates are added to exit.
                    for (i = 0; i < groupLength; ++i) {
                        if (node = group[i]) {
                            keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
                            if (keyValue in nodeByKeyValue) {
                                exit[i] = node;
                            } else {
                                nodeByKeyValue[keyValue] = node;
                            }
                        }
                    }

                    // Compute the key for each datum.
                    // If there a node associated with this key, join and add it to update.
                    // If there is not (or the key is a duplicate), add it to enter.
                    for (i = 0; i < dataLength; ++i) {
                        keyValue = keyPrefix + key.call(parent, data[i], i, data);
                        if (node = nodeByKeyValue[keyValue]) {
                            update[i] = node;
                            node.__data__ = data[i];
                            nodeByKeyValue[keyValue] = null;
                        } else {
                            enter[i] = new __WEBPACK_IMPORTED_MODULE_1__enter__["b" /* EnterNode */ ](parent, data[i]);
                        }
                    }

                    // Add any remaining nodes that were not bound to data to exit.
                    for (i = 0; i < groupLength; ++i) {
                        if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
                            exit[i] = node;
                        }
                    }
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(value, key) {
                    if (!value) {
                        data = new Array(this.size()), j = -1;
                        this.each(function(d) { data[++j] = d; });
                        return data;
                    }

                    var bind = key ? bindKey : bindIndex,
                        parents = this._parents,
                        groups = this._groups;

                    if (typeof value !== "function") value = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_2__constant__["a" /* default */ ])(value);

                    for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
                        var parent = parents[j],
                            group = groups[j],
                            groupLength = group.length,
                            data = value.call(parent, parent && parent.__data__, j, parents),
                            dataLength = data.length,
                            enterGroup = enter[j] = new Array(dataLength),
                            updateGroup = update[j] = new Array(dataLength),
                            exitGroup = exit[j] = new Array(groupLength);

                        bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);

                        // Now connect the enter nodes to their following update node, such that
                        // appendChild can insert the materialized enter node before this node,
                        // rather than at the end of the parent node.
                        for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
                            if (previous = enterGroup[i0]) {
                                if (i0 >= i1) i1 = i0 + 1;
                                while (!(next = updateGroup[i1]) && ++i1 < dataLength);
                                previous._next = next || null;
                            }
                        }
                    }

                    update = new __WEBPACK_IMPORTED_MODULE_0__index__["b" /* Selection */ ](update, parents);
                    update._enter = enter;
                    update._exit = exit;
                    return update;
                };


                /***/
            }),
            /* 89 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function(value) {
                    return arguments.length ?
                        this.property("__data__", value) :
                        this.node().__data__;
                };


                /***/
            }),
            /* 90 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__window__ = __webpack_require__(21);


                function dispatchEvent(node, type, params) {
                    var window = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__window__["a" /* default */ ])(node),
                        event = window.CustomEvent;

                    if (event) {
                        event = new event(type, params);
                    } else {
                        event = window.document.createEvent("Event");
                        if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;
                        else event.initEvent(type, false, false);
                    }

                    node.dispatchEvent(event);
                }

                function dispatchConstant(type, params) {
                    return function() {
                        return dispatchEvent(this, type, params);
                    };
                }

                function dispatchFunction(type, params) {
                    return function() {
                        return dispatchEvent(this, type, params.apply(this, arguments));
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(type, params) {
                    return this.each((typeof params === "function" ?
                        dispatchFunction :
                        dispatchConstant)(type, params));
                };


                /***/
            }),
            /* 91 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function(callback) {

                    for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
                        for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
                            if (node = group[i]) callback.call(node, node.__data__, i, group);
                        }
                    }

                    return this;
                };


                /***/
            }),
            /* 92 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    return !this.node();
                };


                /***/
            }),
            /* 93 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__sparse__ = __webpack_require__(39);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__index__ = __webpack_require__(0);



                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    return new __WEBPACK_IMPORTED_MODULE_1__index__["b" /* Selection */ ](this._exit || this._groups.map(__WEBPACK_IMPORTED_MODULE_0__sparse__["a" /* default */ ]), this._parents);
                };


                /***/
            }),
            /* 94 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__index__ = __webpack_require__(0);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__matcher__ = __webpack_require__(37);



                /* harmony default export */
                __webpack_exports__["a"] = function(match) {
                    if (typeof match !== "function") match = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__matcher__["a" /* default */ ])(match);

                    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
                        for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
                            if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
                                subgroup.push(node);
                            }
                        }
                    }

                    return new __WEBPACK_IMPORTED_MODULE_0__index__["b" /* Selection */ ](subgroups, this._parents);
                };


                /***/
            }),
            /* 95 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";

                function htmlRemove() {
                    this.innerHTML = "";
                }

                function htmlConstant(value) {
                    return function() {
                        this.innerHTML = value;
                    };
                }

                function htmlFunction(value) {
                    return function() {
                        var v = value.apply(this, arguments);
                        this.innerHTML = v == null ? "" : v;
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(value) {
                    return arguments.length ?
                        this.each(value == null ?
                            htmlRemove : (typeof value === "function" ?
                                htmlFunction :
                                htmlConstant)(value)) :
                        this.node().innerHTML;
                };


                /***/
            }),
            /* 96 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__creator__ = __webpack_require__(14);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__selector__ = __webpack_require__(19);



                function constantNull() {
                    return null;
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name, before) {
                    var create = typeof name === "function" ? name : __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__creator__["a" /* default */ ])(name),
                        select = before == null ? constantNull : typeof before === "function" ? before : __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__selector__["a" /* default */ ])(before);
                    return this.select(function() {
                        return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
                    });
                };


                /***/
            }),
            /* 97 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";

                function lower() {
                    if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
                }

                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    return this.each(lower);
                };


                /***/
            }),
            /* 98 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__index__ = __webpack_require__(0);


                /* harmony default export */
                __webpack_exports__["a"] = function(selection) {

                    for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
                        for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
                            if (node = group0[i] || group1[i]) {
                                merge[i] = node;
                            }
                        }
                    }

                    for (; j < m0; ++j) {
                        merges[j] = groups0[j];
                    }

                    return new __WEBPACK_IMPORTED_MODULE_0__index__["b" /* Selection */ ](merges, this._parents);
                };


                /***/
            }),
            /* 99 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function() {

                    for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
                        for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
                            var node = group[i];
                            if (node) return node;
                        }
                    }

                    return null;
                };


                /***/
            }),
            /* 100 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    var nodes = new Array(this.size()),
                        i = -1;
                    this.each(function() { nodes[++i] = this; });
                    return nodes;
                };


                /***/
            }),
            /* 101 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function() {

                    for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
                        for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
                            if (node = group[i]) {
                                if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
                                next = node;
                            }
                        }
                    }

                    return this;
                };


                /***/
            }),
            /* 102 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";

                function propertyRemove(name) {
                    return function() {
                        delete this[name];
                    };
                }

                function propertyConstant(name, value) {
                    return function() {
                        this[name] = value;
                    };
                }

                function propertyFunction(name, value) {
                    return function() {
                        var v = value.apply(this, arguments);
                        if (v == null) delete this[name];
                        else this[name] = v;
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name, value) {
                    return arguments.length > 1 ?
                        this.each((value == null ?
                            propertyRemove : typeof value === "function" ?
                            propertyFunction :
                            propertyConstant)(name, value)) :
                        this.node()[name];
                };


                /***/
            }),
            /* 103 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";

                function raise() {
                    if (this.nextSibling) this.parentNode.appendChild(this);
                }

                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    return this.each(raise);
                };


                /***/
            }),
            /* 104 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";

                function remove() {
                    var parent = this.parentNode;
                    if (parent) parent.removeChild(this);
                }

                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    return this.each(remove);
                };


                /***/
            }),
            /* 105 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__index__ = __webpack_require__(0);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__selector__ = __webpack_require__(19);



                /* harmony default export */
                __webpack_exports__["a"] = function(select) {
                    if (typeof select !== "function") select = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__selector__["a" /* default */ ])(select);

                    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
                        for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
                            if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
                                if ("__data__" in node) subnode.__data__ = node.__data__;
                                subgroup[i] = subnode;
                            }
                        }
                    }

                    return new __WEBPACK_IMPORTED_MODULE_0__index__["b" /* Selection */ ](subgroups, this._parents);
                };


                /***/
            }),
            /* 106 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__index__ = __webpack_require__(0);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__selectorAll__ = __webpack_require__(40);



                /* harmony default export */
                __webpack_exports__["a"] = function(select) {
                    if (typeof select !== "function") select = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__selectorAll__["a" /* default */ ])(select);

                    for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
                        for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
                            if (node = group[i]) {
                                subgroups.push(select.call(node, node.__data__, i, group));
                                parents.push(node);
                            }
                        }
                    }

                    return new __WEBPACK_IMPORTED_MODULE_0__index__["b" /* Selection */ ](subgroups, parents);
                };


                /***/
            }),
            /* 107 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    var size = 0;
                    this.each(function() {++size; });
                    return size;
                };


                /***/
            }),
            /* 108 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__index__ = __webpack_require__(0);


                /* harmony default export */
                __webpack_exports__["a"] = function(compare) {
                    if (!compare) compare = ascending;

                    function compareNode(a, b) {
                        return a && b ? compare(a.__data__, b.__data__) : !a - !b;
                    }

                    for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
                        for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
                            if (node = group[i]) {
                                sortgroup[i] = node;
                            }
                        }
                        sortgroup.sort(compareNode);
                    }

                    return new __WEBPACK_IMPORTED_MODULE_0__index__["b" /* Selection */ ](sortgroups, this._parents).order();
                };

                function ascending(a, b) {
                    return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
                }


                /***/
            }),
            /* 109 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__window__ = __webpack_require__(21);


                function styleRemove(name) {
                    return function() {
                        this.style.removeProperty(name);
                    };
                }

                function styleConstant(name, value, priority) {
                    return function() {
                        this.style.setProperty(name, value, priority);
                    };
                }

                function styleFunction(name, value, priority) {
                    return function() {
                        var v = value.apply(this, arguments);
                        if (v == null) this.style.removeProperty(name);
                        else this.style.setProperty(name, v, priority);
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name, value, priority) {
                    var node;
                    return arguments.length > 1 ?
                        this.each((value == null ?
                            styleRemove : typeof value === "function" ?
                            styleFunction :
                            styleConstant)(name, value, priority == null ? "" : priority)) :
                        __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__window__["a" /* default */ ])(node = this.node())
                        .getComputedStyle(node, null)
                        .getPropertyValue(name);
                };


                /***/
            }),
            /* 110 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";

                function textRemove() {
                    this.textContent = "";
                }

                function textConstant(value) {
                    return function() {
                        this.textContent = value;
                    };
                }

                function textFunction(value) {
                    return function() {
                        var v = value.apply(this, arguments);
                        this.textContent = v == null ? "" : v;
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(value) {
                    return arguments.length ?
                        this.each(value == null ?
                            textRemove : (typeof value === "function" ?
                                textFunction :
                                textConstant)(value)) :
                        this.node().textContent;
                };


                /***/
            }),
            /* 111 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__sourceEvent__ = __webpack_require__(20);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__point__ = __webpack_require__(17);



                /* harmony default export */
                __webpack_exports__["a"] = function(node, touches, identifier) {
                    if (arguments.length < 3) identifier = touches, touches = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__sourceEvent__["a" /* default */ ])().changedTouches;

                    for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
                        if ((touch = touches[i]).identifier === identifier) {
                            return __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__point__["a" /* default */ ])(node, touch);
                        }
                    }

                    return null;
                };


                /***/
            }),
            /* 112 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__sourceEvent__ = __webpack_require__(20);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__point__ = __webpack_require__(17);



                /* harmony default export */
                __webpack_exports__["a"] = function(node, touches) {
                    if (touches == null) touches = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__sourceEvent__["a" /* default */ ])().touches;

                    for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {
                        points[i] = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__point__["a" /* default */ ])(node, touches[i]);
                    }

                    return points;
                };


                /***/
            }),
            /* 113 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__timer__ = __webpack_require__(22);


                /* unused harmony default export */
                var _unused_webpack_default_export = function(callback, delay, time) {
                    var t = new __WEBPACK_IMPORTED_MODULE_0__timer__["b" /* Timer */ ],
                        total = delay;
                    if (delay == null) return t.restart(callback, delay, time), t;
                    delay = +delay, time = time == null ? __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__timer__["c" /* now */ ])() : +time;
                    t.restart(function tick(elapsed) {
                        elapsed += total;
                        t.restart(tick, total += delay, time);
                        callback(elapsed);
                    }, delay, time);
                    return t;
                };


                /***/
            }),
            /* 114 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__timer__ = __webpack_require__(22);


                /* harmony default export */
                __webpack_exports__["a"] = function(callback, delay, time) {
                    var t = new __WEBPACK_IMPORTED_MODULE_0__timer__["b" /* Timer */ ];
                    delay = delay == null ? 0 : +delay;
                    t.restart(function(elapsed) {
                        t.stop();
                        callback(elapsed + delay);
                    }, delay, time);
                    return t;
                };


                /***/
            }),
            /* 115 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                Object.defineProperty(__webpack_exports__, "__esModule", { value: true });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__src_selection_index__ = __webpack_require__(117);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__src_transition_index__ = __webpack_require__(3);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "transition", function() { return __WEBPACK_IMPORTED_MODULE_1__src_transition_index__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__src_active__ = __webpack_require__(116);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "active", function() { return __WEBPACK_IMPORTED_MODULE_2__src_active__["a"]; });
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_3__src_interrupt__ = __webpack_require__(42);
                /* harmony reexport (binding) */
                __webpack_require__.d(__webpack_exports__, "interrupt", function() { return __WEBPACK_IMPORTED_MODULE_3__src_interrupt__["a"]; });






                /***/
            }),
            /* 116 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__transition_index__ = __webpack_require__(3);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__transition_schedule__ = __webpack_require__(1);



                var root = [null];

                /* harmony default export */
                __webpack_exports__["a"] = function(node, name) {
                    var schedules = node.__transition,
                        schedule,
                        i;

                    if (schedules) {
                        name = name == null ? null : name + "";
                        for (i in schedules) {
                            if ((schedule = schedules[i]).state > __WEBPACK_IMPORTED_MODULE_1__transition_schedule__["d" /* SCHEDULED */ ] && schedule.name === name) {
                                return new __WEBPACK_IMPORTED_MODULE_0__transition_index__["b" /* Transition */ ]([
                                    [node]
                                ], root, name, +i);
                            }
                        }
                    }

                    return null;
                };


                /***/
            }),
            /* 117 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_selection__ = __webpack_require__(2);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__interrupt__ = __webpack_require__(118);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__transition__ = __webpack_require__(119);




                __WEBPACK_IMPORTED_MODULE_0_d3_selection__["selection"].prototype.interrupt = __WEBPACK_IMPORTED_MODULE_1__interrupt__["a" /* default */ ];
                __WEBPACK_IMPORTED_MODULE_0_d3_selection__["selection"].prototype.transition = __WEBPACK_IMPORTED_MODULE_2__transition__["a" /* default */ ];


                /***/
            }),
            /* 118 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__interrupt__ = __webpack_require__(42);


                /* harmony default export */
                __webpack_exports__["a"] = function(name) {
                    return this.each(function() {
                        __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__interrupt__["a" /* default */ ])(this, name);
                    });
                };


                /***/
            }),
            /* 119 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__transition_index__ = __webpack_require__(3);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__transition_schedule__ = __webpack_require__(1);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2_d3_ease__ = __webpack_require__(58);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_3_d3_timer__ = __webpack_require__(41);





                var defaultTiming = {
                    time: null, // Set on use.
                    delay: 0,
                    duration: 250,
                    ease: __WEBPACK_IMPORTED_MODULE_2_d3_ease__["a" /* easeCubicInOut */ ]
                };

                function inherit(node, id) {
                    var timing;
                    while (!(timing = node.__transition) || !(timing = timing[id])) {
                        if (!(node = node.parentNode)) {
                            return defaultTiming.time = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_3_d3_timer__["c" /* now */ ])(), defaultTiming;
                        }
                    }
                    return timing;
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name) {
                    var id,
                        timing;

                    if (name instanceof __WEBPACK_IMPORTED_MODULE_0__transition_index__["b" /* Transition */ ]) {
                        id = name._id, name = name._name;
                    } else {
                        id = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__transition_index__["c" /* newId */ ])(), (timing = defaultTiming).time = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_3_d3_timer__["c" /* now */ ])(), name = name == null ? null : name + "";
                    }

                    for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
                        for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
                            if (node = group[i]) {
                                __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__transition_schedule__["h" /* default */ ])(node, name, id, i, group, timing || inherit(node, id));
                            }
                        }
                    }

                    return new __WEBPACK_IMPORTED_MODULE_0__transition_index__["b" /* Transition */ ](groups, this._parents, name, id);
                };


                /***/
            }),
            /* 120 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_interpolate__ = __webpack_require__(11);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1_d3_selection__ = __webpack_require__(2);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__tween__ = __webpack_require__(8);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_3__interpolate__ = __webpack_require__(43);





                function attrRemove(name) {
                    return function() {
                        this.removeAttribute(name);
                    };
                }

                function attrRemoveNS(fullname) {
                    return function() {
                        this.removeAttributeNS(fullname.space, fullname.local);
                    };
                }

                function attrConstant(name, interpolate, value1) {
                    var value00,
                        interpolate0;
                    return function() {
                        var value0 = this.getAttribute(name);
                        return value0 === value1 ? null :
                            value0 === value00 ? interpolate0 :
                            interpolate0 = interpolate(value00 = value0, value1);
                    };
                }

                function attrConstantNS(fullname, interpolate, value1) {
                    var value00,
                        interpolate0;
                    return function() {
                        var value0 = this.getAttributeNS(fullname.space, fullname.local);
                        return value0 === value1 ? null :
                            value0 === value00 ? interpolate0 :
                            interpolate0 = interpolate(value00 = value0, value1);
                    };
                }

                function attrFunction(name, interpolate, value) {
                    var value00,
                        value10,
                        interpolate0;
                    return function() {
                        var value0, value1 = value(this);
                        if (value1 == null) return void this.removeAttribute(name);
                        value0 = this.getAttribute(name);
                        return value0 === value1 ? null :
                            value0 === value00 && value1 === value10 ? interpolate0 :
                            interpolate0 = interpolate(value00 = value0, value10 = value1);
                    };
                }

                function attrFunctionNS(fullname, interpolate, value) {
                    var value00,
                        value10,
                        interpolate0;
                    return function() {
                        var value0, value1 = value(this);
                        if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
                        value0 = this.getAttributeNS(fullname.space, fullname.local);
                        return value0 === value1 ? null :
                            value0 === value00 && value1 === value10 ? interpolate0 :
                            interpolate0 = interpolate(value00 = value0, value10 = value1);
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name, value) {
                    var fullname = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1_d3_selection__["namespace"])(name),
                        i = fullname === "transform" ? __WEBPACK_IMPORTED_MODULE_0_d3_interpolate__["e" /* interpolateTransformSvg */ ] : __WEBPACK_IMPORTED_MODULE_3__interpolate__["a" /* default */ ];
                    return this.attrTween(name, typeof value === "function" ?
                        (fullname.local ? attrFunctionNS : attrFunction)(fullname, i, __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_2__tween__["b" /* tweenValue */ ])(this, "attr." + name, value)) :
                        value == null ? (fullname.local ? attrRemoveNS : attrRemove)(fullname) :
                        (fullname.local ? attrConstantNS : attrConstant)(fullname, i, value));
                };


                /***/
            }),
            /* 121 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_selection__ = __webpack_require__(2);


                function attrTweenNS(fullname, value) {
                    function tween() {
                        var node = this,
                            i = value.apply(node, arguments);
                        return i && function(t) {
                            node.setAttributeNS(fullname.space, fullname.local, i(t));
                        };
                    }
                    tween._value = value;
                    return tween;
                }

                function attrTween(name, value) {
                    function tween() {
                        var node = this,
                            i = value.apply(node, arguments);
                        return i && function(t) {
                            node.setAttribute(name, i(t));
                        };
                    }
                    tween._value = value;
                    return tween;
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name, value) {
                    var key = "attr." + name;
                    if (arguments.length < 2) return (key = this.tween(key)) && key._value;
                    if (value == null) return this.tween(key, null);
                    if (typeof value !== "function") throw new Error;
                    var fullname = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_selection__["namespace"])(name);
                    return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
                };


                /***/
            }),
            /* 122 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__schedule__ = __webpack_require__(1);


                function delayFunction(id, value) {
                    return function() {
                        __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["g" /* init */ ])(this, id).delay = +value.apply(this, arguments);
                    };
                }

                function delayConstant(id, value) {
                    return value = +value,
                        function() {
                            __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["g" /* init */ ])(this, id).delay = value;
                        };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(value) {
                    var id = this._id;

                    return arguments.length ?
                        this.each((typeof value === "function" ?
                            delayFunction :
                            delayConstant)(id, value)) :
                        __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["f" /* get */ ])(this.node(), id).delay;
                };


                /***/
            }),
            /* 123 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__schedule__ = __webpack_require__(1);


                function durationFunction(id, value) {
                    return function() {
                        __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["e" /* set */ ])(this, id).duration = +value.apply(this, arguments);
                    };
                }

                function durationConstant(id, value) {
                    return value = +value,
                        function() {
                            __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["e" /* set */ ])(this, id).duration = value;
                        };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(value) {
                    var id = this._id;

                    return arguments.length ?
                        this.each((typeof value === "function" ?
                            durationFunction :
                            durationConstant)(id, value)) :
                        __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["f" /* get */ ])(this.node(), id).duration;
                };


                /***/
            }),
            /* 124 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__schedule__ = __webpack_require__(1);


                function easeConstant(id, value) {
                    if (typeof value !== "function") throw new Error;
                    return function() {
                        __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["e" /* set */ ])(this, id).ease = value;
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(value) {
                    var id = this._id;

                    return arguments.length ?
                        this.each(easeConstant(id, value)) :
                        __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["f" /* get */ ])(this.node(), id).ease;
                };


                /***/
            }),
            /* 125 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_selection__ = __webpack_require__(2);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__index__ = __webpack_require__(3);



                /* harmony default export */
                __webpack_exports__["a"] = function(match) {
                    if (typeof match !== "function") match = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_selection__["matcher"])(match);

                    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
                        for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
                            if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
                                subgroup.push(node);
                            }
                        }
                    }

                    return new __WEBPACK_IMPORTED_MODULE_1__index__["b" /* Transition */ ](subgroups, this._parents, this._name, this._id);
                };


                /***/
            }),
            /* 126 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__index__ = __webpack_require__(3);


                /* harmony default export */
                __webpack_exports__["a"] = function(transition) {
                    if (transition._id !== this._id) throw new Error;

                    for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
                        for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
                            if (node = group0[i] || group1[i]) {
                                merge[i] = node;
                            }
                        }
                    }

                    for (; j < m0; ++j) {
                        merges[j] = groups0[j];
                    }

                    return new __WEBPACK_IMPORTED_MODULE_0__index__["b" /* Transition */ ](merges, this._parents, this._name, this._id);
                };


                /***/
            }),
            /* 127 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__schedule__ = __webpack_require__(1);


                function start(name) {
                    return (name + "").trim().split(/^|\s+/).every(function(t) {
                        var i = t.indexOf(".");
                        if (i >= 0) t = t.slice(0, i);
                        return !t || t === "start";
                    });
                }

                function onFunction(id, name, listener) {
                    var on0, on1, sit = start(name) ? __WEBPACK_IMPORTED_MODULE_0__schedule__["g" /* init */ ] : __WEBPACK_IMPORTED_MODULE_0__schedule__["e" /* set */ ];
                    return function() {
                        var schedule = sit(this, id),
                            on = schedule.on;

                        // If this node shared a dispatch with the previous node,
                        // just assign the updated shared dispatch and we’re done!
                        // Otherwise, copy-on-write.
                        if (on !== on0)(on1 = (on0 = on).copy()).on(name, listener);

                        schedule.on = on1;
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name, listener) {
                    var id = this._id;

                    return arguments.length < 2 ?
                        __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__schedule__["f" /* get */ ])(this.node(), id).on.on(name) :
                        this.each(onFunction(id, name, listener));
                };


                /***/
            }),
            /* 128 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";

                function removeFunction(id) {
                    return function() {
                        var parent = this.parentNode;
                        for (var i in this.__transition)
                            if (+i !== id) return;
                        if (parent) parent.removeChild(this);
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    return this.on("end.remove", removeFunction(this._id));
                };


                /***/
            }),
            /* 129 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_selection__ = __webpack_require__(2);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__index__ = __webpack_require__(3);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__schedule__ = __webpack_require__(1);




                /* harmony default export */
                __webpack_exports__["a"] = function(select) {
                    var name = this._name,
                        id = this._id;

                    if (typeof select !== "function") select = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_selection__["selector"])(select);

                    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
                        for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
                            if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
                                if ("__data__" in node) subnode.__data__ = node.__data__;
                                subgroup[i] = subnode;
                                __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_2__schedule__["h" /* default */ ])(subgroup[i], name, id, i, subgroup, __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_2__schedule__["f" /* get */ ])(node, id));
                            }
                        }
                    }

                    return new __WEBPACK_IMPORTED_MODULE_1__index__["b" /* Transition */ ](subgroups, this._parents, name, id);
                };


                /***/
            }),
            /* 130 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_selection__ = __webpack_require__(2);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__index__ = __webpack_require__(3);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__schedule__ = __webpack_require__(1);




                /* harmony default export */
                __webpack_exports__["a"] = function(select) {
                    var name = this._name,
                        id = this._id;

                    if (typeof select !== "function") select = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0_d3_selection__["selectorAll"])(select);

                    for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
                        for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
                            if (node = group[i]) {
                                for (var children = select.call(node, node.__data__, i, group), child, inherit = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_2__schedule__["f" /* get */ ])(node, id), k = 0, l = children.length; k < l; ++k) {
                                    if (child = children[k]) {
                                        __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_2__schedule__["h" /* default */ ])(child, name, id, k, children, inherit);
                                    }
                                }
                                subgroups.push(children);
                                parents.push(node);
                            }
                        }
                    }

                    return new __WEBPACK_IMPORTED_MODULE_1__index__["b" /* Transition */ ](subgroups, parents, name, id);
                };


                /***/
            }),
            /* 131 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_selection__ = __webpack_require__(2);


                var Selection = __WEBPACK_IMPORTED_MODULE_0_d3_selection__["selection"].prototype.constructor;

                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    return new Selection(this._groups, this._parents);
                };


                /***/
            }),
            /* 132 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0_d3_interpolate__ = __webpack_require__(11);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1_d3_selection__ = __webpack_require__(2);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_2__tween__ = __webpack_require__(8);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_3__interpolate__ = __webpack_require__(43);





                function styleRemove(name, interpolate) {
                    var value00,
                        value10,
                        interpolate0;
                    return function() {
                        var style = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1_d3_selection__["window"])(this).getComputedStyle(this, null),
                            value0 = style.getPropertyValue(name),
                            value1 = (this.style.removeProperty(name), style.getPropertyValue(name));
                        return value0 === value1 ? null :
                            value0 === value00 && value1 === value10 ? interpolate0 :
                            interpolate0 = interpolate(value00 = value0, value10 = value1);
                    };
                }

                function styleRemoveEnd(name) {
                    return function() {
                        this.style.removeProperty(name);
                    };
                }

                function styleConstant(name, interpolate, value1) {
                    var value00,
                        interpolate0;
                    return function() {
                        var value0 = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1_d3_selection__["window"])(this).getComputedStyle(this, null).getPropertyValue(name);
                        return value0 === value1 ? null :
                            value0 === value00 ? interpolate0 :
                            interpolate0 = interpolate(value00 = value0, value1);
                    };
                }

                function styleFunction(name, interpolate, value) {
                    var value00,
                        value10,
                        interpolate0;
                    return function() {
                        var style = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1_d3_selection__["window"])(this).getComputedStyle(this, null),
                            value0 = style.getPropertyValue(name),
                            value1 = value(this);
                        if (value1 == null) value1 = (this.style.removeProperty(name), style.getPropertyValue(name));
                        return value0 === value1 ? null :
                            value0 === value00 && value1 === value10 ? interpolate0 :
                            interpolate0 = interpolate(value00 = value0, value10 = value1);
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name, value, priority) {
                    var i = (name += "") === "transform" ? __WEBPACK_IMPORTED_MODULE_0_d3_interpolate__["a" /* interpolateTransformCss */ ] : __WEBPACK_IMPORTED_MODULE_3__interpolate__["a" /* default */ ];
                    return value == null ? this
                        .styleTween(name, styleRemove(name, i))
                        .on("end.style." + name, styleRemoveEnd(name)) :
                        this.styleTween(name, typeof value === "function" ?
                            styleFunction(name, i, __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_2__tween__["b" /* tweenValue */ ])(this, "style." + name, value)) :
                            styleConstant(name, i, value), priority);
                };


                /***/
            }),
            /* 133 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";

                function styleTween(name, value, priority) {
                    function tween() {
                        var node = this,
                            i = value.apply(node, arguments);
                        return i && function(t) {
                            node.style.setProperty(name, i(t), priority);
                        };
                    }
                    tween._value = value;
                    return tween;
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(name, value, priority) {
                    var key = "style." + (name += "");
                    if (arguments.length < 2) return (key = this.tween(key)) && key._value;
                    if (value == null) return this.tween(key, null);
                    if (typeof value !== "function") throw new Error;
                    return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
                };


                /***/
            }),
            /* 134 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__tween__ = __webpack_require__(8);


                function textConstant(value) {
                    return function() {
                        this.textContent = value;
                    };
                }

                function textFunction(value) {
                    return function() {
                        var value1 = value(this);
                        this.textContent = value1 == null ? "" : value1;
                    };
                }

                /* harmony default export */
                __webpack_exports__["a"] = function(value) {
                    return this.tween("text", typeof value === "function" ?
                        textFunction(__webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__tween__["b" /* tweenValue */ ])(this, "text", value)) :
                        textConstant(value == null ? "" : value + ""));
                };


                /***/
            }),
            /* 135 */
            /***/
            (function(module, __webpack_exports__, __webpack_require__) {

                "use strict";
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_0__index__ = __webpack_require__(3);
                /* harmony import */
                var __WEBPACK_IMPORTED_MODULE_1__schedule__ = __webpack_require__(1);



                /* harmony default export */
                __webpack_exports__["a"] = function() {
                    var name = this._name,
                        id0 = this._id,
                        id1 = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_0__index__["c" /* newId */ ])();

                    for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
                        for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
                            if (node = group[i]) {
                                var inherit = __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__schedule__["f" /* get */ ])(node, id0);
                                __webpack_require__.i(__WEBPACK_IMPORTED_MODULE_1__schedule__["h" /* default */ ])(node, name, id1, i, group, {
                                    time: inherit.time + inherit.delay + inherit.duration,
                                    delay: 0,
                                    duration: inherit.duration,
                                    ease: inherit.ease
                                });
                            }
                        }
                    }

                    return new __WEBPACK_IMPORTED_MODULE_0__index__["b" /* Transition */ ](groups, this._parents, name, id1);
                };


                /***/
            }),
            /* 136 */
            /***/
            (function(module, exports, __webpack_require__) {

                /* WEBPACK VAR INJECTION */
                (function(global) {
                    ! function(t, e) {
                        true ? e(exports, __webpack_require__(2), __webpack_require__(29)) :
                            "function" == typeof define && define.amd ? define(["exports", "d3-selection", "d3-dispatch"], e) :
                            e(t.d3Kit = t.d3Kit || {}, t.d3, t.d3)
                    }(this, function(t, e, n) {
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                        function i(t) {
                            var e = "undefined" == typeof t ? "undefined" : x(t);
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                            return e == N || e == C || e == R
                        }

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                        }

                        function s(t) {
                            return "symbol" == ("undefined" == typeof t ? "undefined" : x(t)) || a(t) && $.call(t) == G
                        }

                        function o(t) {
                            if ("number" == typeof t) return t;
                            if (s(t)) return z;
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                                var e = "function" == typeof t.valueOf ? t.valueOf() : t;
                                t = i(e) ? e + "" : e
                            }
                            if ("string" != typeof t) return 0 === t ? t : +t;
                            t = t.replace(q, "");
                            var n = U.test(t);
                            return n || K.test(t) ? V(t.slice(2), n ? 2 : 8) : B.test(t) ? z : +t
                        }

                        function h(t, e, n) {
                            function r(e) {
                                var n = g,
                                    i = p;
                                return g = p = void 0, _ = e, m = t.apply(i, n)
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                            function a(t) { return _ = t, y = setTimeout(u, e), b ? r(t) : m }

                            function s(t) {
                                var n = t - w,
                                    i = t - _,
                                    r = e - n;
                                return O ? Q(r, v - i) : r
                            }

                            function h(t) {
                                var n = t - w,
                                    i = t - _;
                                return void 0 === w || n >= e || 0 > n || O && i >= v
                            }

                            function u() { var t = L(); return h(t) ? l(t) : void(y = setTimeout(u, s(t))) }

                            function l(t) { return y = void 0, k && g ? r(t) : (g = p = void 0, m) }

                            function c() { void 0 !== y && clearTimeout(y), _ = 0, g = w = p = y = void 0 }

                            function f() { return void 0 === y ? m : l(L()) }

                            function d() {
                                var t = L(),
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                                if (g = arguments, p = this, w = t, n) { if (void 0 === y) return a(w); if (O) return y = setTimeout(u, e), r(w) }
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                            var g, p, v, m, y, w, _ = 0,
                                b = !1,
                                O = !1,
                                k = !0;
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                        }

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                            if (!e && Y) return Y.call(t);
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                        function d(t) {
                            return f(t).replace(/([A-Z])/g, "-$1").replace(/[-_\s]+/g, "-").toLowerCase()
                        }

                        function g(t) {
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                            for (var e = 1; e < arguments.length; e++) {
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                                        var a = n[0],
                                            s = r(a) ? a() : a;
                                        if (s instanceof t) this.width = s.width, this.height = s.height;
                                        else if (O(s)) this.width = s.clientWidth, this.height = s.clientHeight;
                                        else if (Array.isArray(s)) this.width = s[0], this.height = s[1];
                                        else {
                                            if (!(_(s) && _(s.width) && _(s.height))) { var o = new Error("Unsupported input. Must be either\n  DOMNode, Array or Object with field width and height,\n  or a function that returns any of the above."); throw o.value = a, o }
                                            this.width = s.width, this.height = s.height
                                        }
                                    } else {
                                        var h = n[0],
                                            u = n[1];
                                        this.width = h, this.height = u
                                    }
                                }
                                return A(t, [{ key: "isEqual", value: function(e) { if (e instanceof t) return this.width === e.width && this.height === e.height; var n = new t(e); return this.width === n.width && this.height === n.height } }, { key: "toArray", value: function() { return [this.width, this.height] } }, { key: "toObject", value: function() { return { width: this.width, height: this.height } } }]), t
                            }(),
                            nt = function() {
                                function t() {
                                    var e = arguments.length <= 0 || void 0 === arguments[0] ? {} : arguments[0];
                                    E(this, t);
                                    var n = e || {},
                                        i = n.mode,
                                        r = void 0 === i ? t.MODE_BASIC : i,
                                        a = n.width,
                                        s = void 0 === a ? "100%" : a,
                                        o = n.height,
                                        h = void 0 === o ? null : o,
                                        u = n.ratio,
                                        l = void 0 === u ? 1 : u,
                                        c = n.maxWidth,
                                        f = void 0 === c ? null : c,
                                        d = n.maxHeight,
                                        g = void 0 === d ? null : d;
                                    r === t.MODE_ASPECT_RATIO ? (this.wFn = k(f), this.hFn = k(g), this.options = { mode: r, ratio: l, maxWidth: f, maxHeight: g }) : (this.wFn = k(s), this.hFn = k(h), this.options = { mode: r, width: s, height: h })
                                }
                                return A(t, [{
                                    key: "fit",
                                    value: function() {
                                        var e = arguments.length <= 0 || void 0 === arguments[0] ? w("box") : arguments[0],
                                            n = arguments.length <= 1 || void 0 === arguments[1] ? w("container") : arguments[1],
                                            i = new et(e),
                                            r = i.width,
                                            a = i.height,
                                            s = new et(n),
                                            o = s.width,
                                            h = s.height,
                                            u = void 0;
                                        if (this.options.mode === t.MODE_ASPECT_RATIO) {
                                            var l = this.options.ratio,
                                                c = this.wFn(o, o),
                                                f = this.hFn(h, h),
                                                d = Math.floor(l * f);
                                            u = c >= d ? new et(d, f) : new et(c, Math.floor(c / l))
                                        } else u = new et(this.wFn(r, o), this.hFn(a, h));
                                        return { dimension: u, changed: !u.isEqual(i) }
                                    }
                                }]), t
                            }();
                        nt.MODE_BASIC = "basic", nt.MODE_ASPECT_RATIO = "aspectRatio";
                        var it = function() {
                            function t() {
                                var e = arguments.length <= 0 || void 0 === arguments[0] ? {} : arguments[0];
                                E(this, t);
                                var n = e || {},
                                    i = n.mode,
                                    r = void 0 === i ? t.MODE_WINDOW : i,
                                    a = n.target,
                                    s = void 0 === a ? null : a,
                                    o = n.interval,
                                    h = void 0 === o ? 200 : o;
                                r !== t.MODE_POLLING || s || w("options.target"), this.mode = r, this.target = s, this.interval = h, this.check = this.check.bind(this), this.throttledCheck = u(this.check, this.interval), this.isWatching = !1, this.listeners = { change: [] }
                            }
                            return A(t, [{ key: "hasTargetChanged", value: function() { if (!this.target) return !0; var t = new et(this.target); return this.currentDim && t.isEqual(this.currentDim) ? !1 : (this.currentDim = t, !0) } }, { key: "check", value: function() { return this.hasTargetChanged() && this.dispatch("change", this.currentDim), this } }, { key: "dispatch", value: function(t) { for (var e = this, n = arguments.length, i = Array(n > 1 ? n - 1 : 0), r = 1; n > r; r++) i[r - 1] = arguments[r]; return this.listeners[t].forEach(function(t) { return t.apply(e, i) }), this } }, { key: "on", value: function(t, e) { return -1 === this.listeners[t].indexOf(e) && this.listeners[t].push(e), this } }, { key: "off", value: function(t, e) { return this.listeners[t] = this.listeners[t].filter(function(t) { return t !== e }), this } }, { key: "start", value: function() { return this.isWatching || (this.target && (this.currentDim = new et(this.target)), this.mode === t.MODE_WINDOW ? window.addEventListener("resize", this.throttledCheck) : this.mode === t.MODE_POLLING && (this.intervalId = window.setInterval(this.check, this.interval)), this.isWatching = !0), this } }, { key: "stop", value: function() { return this.isWatching && (this.mode === t.MODE_WINDOW ? window.removeEventListener("resize", this.throttledCheck) : this.mode === t.MODE_POLLING && this.intervalId && (window.clearInterval(this.intervalId), this.intervalId = null), this.isWatching = !1), this } }, { key: "destroy", value: function() { return this.stop(), this.listeners.change = [], this } }]), t
                        }();
                        it.MODE_WINDOW = "window", it.MODE_POLLING = "polling";
                        var rt = function(t) {
                                function e() {
                                    var t = arguments.length <= 0 || void 0 === arguments[0] ? w("box") : arguments[0],
                                        n = arguments.length <= 1 || void 0 === arguments[1] ? w("container") : arguments[1],
                                        i = arguments[2],
                                        r = arguments[3];
                                    E(this, e);
                                    var a = P(this, Object.getPrototypeOf(e).call(this, r)),
                                        s = new nt(i);
                                    return a.fit = function() { return s.fit(t, n) }, a
                                }
                                return j(e, t), A(e, [{
                                    key: "check",
                                    value: function() {
                                        if (this.hasTargetChanged()) {
                                            var t = this.fit(),
                                                e = t.changed,
                                                n = t.dimension;
                                            e && this.dispatch("change", n)
                                        }
                                        return this
                                    }
                                }]), e
                            }(it),
                            at = function() {
                                function t() {
                                    E(this, t);
                                    for (var e = arguments.length, n = Array(e), i = 0; e > i; i++) n[i] = arguments[i];
                                    var r = g.apply(void 0, [this.constructor.getDefaultOptions()].concat(n));
                                    this._state = { width: r.initialWidth, height: r.initialHeight, options: r }, this._updateDimension = h(this._updateDimension.bind(this), 1)
                                }
                                return A(t, null, [{ key: "getDefaultOptions", value: function() { for (var t = arguments.length, e = Array(t), n = 0; t > n; n++) e[n] = arguments[n]; return g.apply(void 0, [{ initialWidth: 720, initialHeight: 500, margin: { top: 30, right: 30, bottom: 30, left: 30 }, offset: [.5, .5], pixelRatio: window.devicePixelRatio || 1 }].concat(e)) } }]), A(t, [{
                                    key: "copyDimension",
                                    value: function(t) {
                                        if (t) {
                                            var e = t._state,
                                                n = e.width,
                                                i = e.height,
                                                r = t._state.options,
                                                a = r.offset,
                                                s = r.margin,
                                                o = r.pixelRatio;
                                            g(this._state, { width: n, height: i, options: { offset: a.concat(), margin: s, pixelRatio: o } }), this._updateDimension()
                                        }
                                        return this
                                    }
                                }, { key: "width", value: function() { if (0 === arguments.length) return this._state.width; var t = Math.floor(+(arguments.length <= 0 ? void 0 : arguments[0])); return t !== this._state.width && (this._state.width = t, this._updateDimension()), this } }, { key: "height", value: function() { if (0 === arguments.length) return this._state.height; var t = Math.floor(+(arguments.length <= 0 ? void 0 : arguments[0])); return t !== this._state.height && (this._state.height = t, this._updateDimension()), this } }, {
                                    key: "dimension",
                                    value: function() {
                                        if (0 === arguments.length) return [this._state.width, this._state.height];
                                        var t = arguments.length <= 0 ? void 0 : arguments[0],
                                            e = W(t, 2),
                                            n = e[0],
                                            i = e[1];
                                        return this.width(n).height(i), this
                                    }
                                }, {
                                    key: "margin",
                                    value: function() {
                                        if (0 === arguments.length) return this._state.options.margin;
                                        var t = this._state.options.margin,
                                            e = p({}, this._state.options.margin, arguments.length <= 0 ? void 0 : arguments[0]),
                                            n = Object.keys(e).some(function(n) { return t[n] !== e[n] });
                                        return n && (this._state.options.margin = e, this._updateDimension()), this
                                    }
                                }, {
                                    key: "offset",
                                    value: function() {
                                        if (0 === arguments.length) return this._state.options.offset;
                                        var t = arguments.length <= 0 ? void 0 : arguments[0],
                                            e = W(this._state.options.offset, 2),
                                            n = e[0],
                                            i = e[1],
                                            r = W(t, 2),
                                            a = r[0],
                                            s = r[1];
                                        return (n !== a || i !== s) && (this._state.options.offset = t, this._updateDimension()), this
                                    }
                                }, { key: "pixelRatio", value: function() { if (0 === arguments.length) return this._state.options.pixelRatio; var t = +(arguments.length <= 0 ? void 0 : arguments[0]); return t !== this._state.options.pixelRatio && (this._state.options.pixelRatio = t, this._updateDimension()), this } }, { key: "_updateDimension", value: function() { return this } }, { key: "updateDimensionNow", value: function() { return this._updateDimension(), this._updateDimension.flush(), this } }]), t
                            }(),
                            st = function(t) {
                                function r(t) {
                                    var n;
                                    E(this, r);
                                    for (var i = arguments.length, a = Array(i > 1 ? i - 1 : 0), s = 1; i > s; s++) a[s - 1] = arguments[s];
                                    var o = P(this, (n = Object.getPrototypeOf(r)).call.apply(n, [this].concat(a)));
                                    p(o._state, { innerWidth: 0, innerHeight: 0, fitOptions: null, data: null, plates: [] }), o.container = e.select(t), o.container.style("line-height", 0), o.chartRoot = o.container.append("div").classed("d3kit-chart-root", !0).attr('id', 'd3kitRoot').style("display", "inline-block").style("position", "relative").style("line-height", 0), o.plates = {};
                                    var u = o.constructor.getCustomEventNames();
                                    return o.setupDispatcher(u), o._dispatchData = h(o._dispatchData.bind(o), 1), o._dispatchOptions = h(o._dispatchOptions.bind(o), 1), o
                                }
                                return j(r, t), A(r, null, [{ key: "getCustomEventNames", value: function() { return [] } }]), A(r, [{ key: "addPlate", value: function(t, e, n) { if (this.plates[t]) throw new Error("Plate with this name already exists", t); return this._state.plates.push(e), this.plates[t] = e, n ? e : (e.getSelection().classed("d3kit-plate", !0).style("position", "absolute").style("top", 0).style("left", 0), this.chartRoot.append(function() { return e.getNode() }), this) } }, {
                                    key: "removePlate",
                                    value: function(t) {
                                        var e = this.plates[t];
                                        if (e) {
                                            var n = this._state.plates.indexOf(e);
                                            n > -1 && this._state.plates.splice(n, 1), e.getNode().parentNode === this.chartRoot.node() && this.chartRoot.node().removeChild(e.getNode()), delete this.plates[t]
                                        }
                                        return this
                                    }
                                }, { key: "setupDispatcher", value: function() { var t = arguments.length <= 0 || void 0 === arguments[0] ? [] : arguments[0]; return this._customEventNames = t, this._eventNames = r.DEFAULT_EVENTS.concat(t), this.dispatcher = n.dispatch.apply(this, this._eventNames), this } }, { key: "getCustomEventNames", value: function() { return this._customEventNames } }, { key: "getInnerWidth", value: function() { return this._state.innerWidth } }, { key: "getInnerHeight", value: function() { return this._state.innerHeight } }, { key: "data", value: function() { for (var t = arguments.length, e = Array(t), n = 0; t > n; n++) e[n] = arguments[n]; if (0 === e.length) return this._state.data; var i = e[0]; return this._state.data = i, this._dispatchData(), this } }, {
                                    key: "options",
                                    value: function() {
                                        for (var t = arguments.length, e = Array(t), n = 0; t > n; n++) e[n] = arguments[n];
                                        if (0 === e.length) return this._state.options;
                                        var i = e[0],
                                            r = p({}, i);
                                        return i.margin && (this.margin(i.margin), delete r.margin), i.offset && (this.offset(i.offset), delete r.offset), i.pixelRatio && (this.pixelRatio(i.pixelRatio), delete r.pixelRatio), this._state.options = g(this._state.options, r), this._dispatchOptions(), this
                                    }
                                }, {
                                    key: "_updateDimension",
                                    value: function() {
                                        var t = this,
                                            e = this._state,
                                            n = e.width,
                                            i = e.height,
                                            r = e.plates,
                                            a = this._state.options.margin,
                                            s = a.top,
                                            o = a.right,
                                            h = a.bottom,
                                            u = a.left;
                                        this._state.innerWidth = n - u - o, this._state.innerHeight = i - s - h, this.chartRoot.style("width", n + "px").style("height", i + "px"), r.forEach(function(e) { e.copyDimension(t).updateDimensionNow() });
                                        var l = this._state,
                                            c = l.innerWidth,
                                            f = l.innerHeight;
                                        return this.dispatcher.apply("resize", this, [n, i, c, f]), this
                                    }
                                }, { key: "hasData", value: function() { var t = this._state.data; return null !== t && void 0 !== t } }, {
                                    key: "hasNonZeroArea",
                                    value: function() {
                                        var t = this._state,
                                            e = t.innerWidth,
                                            n = t.innerHeight;
                                        return e > 0 && n > 0
                                    }
                                }, {
                                    key: "fit",
                                    value: function(t) {
                                        var e = this,
                                            n = arguments.length <= 1 || void 0 === arguments[1] ? !1 : arguments[1];
                                        t && (this._state.fitOptions = t);
                                        var r = new nt(this._state.fitOptions),
                                            a = r.fit(this.dimension(), this.container.node()),
                                            s = a.changed,
                                            o = a.dimension;
                                        s && this.dimension([o.width, o.height]);
                                        var h = !!n;
                                        return h && (this.fitWatcher && this.fitWatcher.destroy(), this.fitWatcher = new rt(function() { return e.dimension() }, this.container.node(), this._state.fitOptions, i(n) ? n : null).on("change", function(t) { return e.dimension([t.width, t.height]) }).start()), this
                                    }
                                }, { key: "stopFitWatcher", value: function() { return this.fitWatcher && (this.fitWatcher.destroy(), this.fitWatcher = null), this } }, { key: "_dispatchData", value: function() { return this.dispatcher.call("data", this, this._state.data), this } }, { key: "_dispatchOptions", value: function() { return this.dispatcher.call("options", this, this._state.options), this } }, { key: "on", value: function(t, e) { return this.dispatcher.on(t, e), this } }, { key: "off", value: function(t) { return this.dispatcher.on(t, null), this } }, {
                                    key: "dispatchAs",
                                    value: function(t) {
                                        var e = this;
                                        return function() {
                                            for (var n = arguments.length, i = Array(n), r = 0; n > r; r++) i[r] = arguments[r];
                                            e.dispatcher.apply(t, e, i)
                                        }
                                    }
                                }, { key: "destroy", value: function() { var t = this; return this._eventNames.forEach(function(e) { t.off(e) }), this.stopFitWatcher(), this } }]), r
                            }(at);
                        st.DEFAULT_EVENTS = ["data", "options", "resize"];
                        var ot = function(t) {
                                function n(t) {
                                    var i;
                                    E(this, n);
                                    for (var r = arguments.length, a = Array(r > 1 ? r - 1 : 0), s = 1; r > s; s++) a[s - 1] = arguments[s];
                                    var o = P(this, (i = Object.getPrototypeOf(n)).call.apply(i, [this].concat(a)));
                                    return o.node = t, o.selection = e.select(o.node), o
                                }
                                return j(n, t), A(n, [{ key: "getNode", value: function() { return this.node } }, { key: "getSelection", value: function() { return this.selection } }]), n
                            }(at),
                            ht = function(t) {
                                function e() {
                                    var t;
                                    E(this, e);
                                    for (var n = arguments.length, i = Array(n), r = 0; n > r; r++) i[r] = arguments[r];
                                    return P(this, (t = Object.getPrototypeOf(e)).call.apply(t, [this, document.createElement("canvas")].concat(i)))
                                }
                                return j(e, t), A(e, [{
                                    key: "getContext2d",
                                    value: function() {
                                        var t = (this.width(), this.height(), this.pixelRatio()),
                                            e = this.margin(),
                                            n = e.top,
                                            i = e.left,
                                            r = this.offset(),
                                            a = W(r, 2),
                                            s = a[0],
                                            o = a[1],
                                            h = this.node.getContext("2d");
                                        return h.setTransform(1, 0, 0, 1, 0, 0), h.scale(t, t), h.translate(i + s, n + o), h
                                    }
                                }, {
                                    key: "clear",
                                    value: function() {
                                        var t = this.width(),
                                            e = this.height(),
                                            n = this.pixelRatio(),
                                            i = this.node.getContext("2d");
                                        return i.setTransform(1, 0, 0, 1, 0, 0), i.scale(n, n), i.clearRect(0, 0, t, e), this
                                    }
                                }, {
                                    key: "_updateDimension",
                                    value: function() {
                                        var t = this.width(),
                                            e = this.height(),
                                            n = this.pixelRatio();
                                        return this.node.setAttribute("width", t * n), this.node.setAttribute("height", e * n), this.node.style.width = t + "px", this.node.style.height = e + "px", this
                                    }
                                }]), e
                            }(ot),
                            ut = function(t) {
                                function e(t) {
                                    var n;
                                    E(this, e);
                                    for (var i = arguments.length, r = Array(i > 1 ? i - 1 : 0), a = 1; i > a; a++) r[a - 1] = arguments[a];
                                    var s = P(this, (n = Object.getPrototypeOf(e)).call.apply(n, [this, t].concat(r)));
                                    return s.addPlate("canvas", new ht), s.canvas = s.plates.canvas.getSelection(), s.updateDimensionNow(), s
                                }
                                return j(e, t), A(e, [{ key: "getContext2d", value: function() { return this.plates.canvas.getContext2d() } }, { key: "clear", value: function() { return this.plates.canvas.clear(), this } }]), e
                            }(st),
                            lt = function(t) {
                                function e() {
                                    var t;
                                    E(this, e);
                                    for (var n = arguments.length, i = Array(n), r = 0; n > r; r++) i[r] = arguments[r];
                                    var a = P(this, (t = Object.getPrototypeOf(e)).call.apply(t, [this, document.createElementNS("http://www.w3.org/2000/svg", "svg")].concat(i)));
                                    return a.rootG = a.selection.append("g"), a.layers = new D(a.rootG), a
                                }
                                return j(e, t), A(e, [{
                                    key: "_updateDimension",
                                    value: function() {
                                        var t = this.width(),
                                            e = this.height(),
                                            n = this.margin(),
                                            i = n.top,
                                            r = n.left,
                                            a = this.offset(),
                                            s = W(a, 2),
                                            o = s[0],
                                            h = s[1];
                                        return this.selection.attr("width", t).attr("height", e), this.rootG.attr("transform", "translate(" + (r + o) + "," + (i + h) + ")"), this
                                    }
                                }]), e
                            }(ot),
                            ct = function(t) {
                                function e(t) {
                                    var n;
                                    E(this, e);
                                    for (var i = arguments.length, r = Array(i > 1 ? i - 1 : 0), a = 1; i > a; a++) r[a - 1] = arguments[a];
                                    var s = P(this, (n = Object.getPrototypeOf(e)).call.apply(n, [this, t].concat(r)));
                                    s.addPlate("svg", new lt);
                                    var o = s.plates.svg;
                                    return s.svg = o.getSelection(), s.rootG = o.rootG, s.layers = o.layers, s.updateDimensionNow(), s
                                }
                                return j(e, t), e
                            }(ut),
                            ft = function(t) {
                                function e(t) {
                                    var n;
                                    E(this, e);
                                    for (var i = arguments.length, r = Array(i > 1 ? i - 1 : 0), a = 1; i > a; a++) r[a - 1] = arguments[a];
                                    var s = P(this, (n = Object.getPrototypeOf(e)).call.apply(n, [this, t].concat(r)));
                                    s.addPlate("svg", new lt);
                                    var o = s.plates.svg;
                                    return s.svg = o.getSelection(), s.rootG = o.rootG, s.layers = o.layers, s.updateDimensionNow(), s
                                }
                                return j(e, t), e
                            }(st),
                            dt = function(t) {
                                function e() {
                                    var t;
                                    E(this, e);
                                    for (var n = arguments.length, i = Array(n), r = 0; n > r; r++) i[r] = arguments[r];
                                    return P(this, (t = Object.getPrototypeOf(e)).call.apply(t, [this, document.createElement("div")].concat(i)))
                                }
                                return j(e, t), A(e, [{
                                    key: "_updateDimension",
                                    value: function() {
                                        var t = this.width(),
                                            e = this.height(),
                                            n = this.margin();
                                        return this.node.style.width = t - n.left - n.right + "px", this.node.style.height = e - n.top - n.bottom + "px", this.node.style.marginLeft = n.left + "px", this.node.style.marginRight = n.right + "px", this.node.style.marginTop = n.top + "px", this.node.style.marginBottom = n.bottom + "px", this
                                    }
                                }]), e
                            }(ot);
                        t.helper = tt, t.AbstractChart = st, t.CanvasChart = ut, t.HybridChart = ct, t.SvgChart = ft, t.AbstractPlate = ot, t.CanvasPlate = ht, t.DivPlate = dt, t.SvgPlate = lt, t.LayerOrganizer = D, Object.defineProperty(t, "__esModule", { value: !0 })
                    });
                    /* WEBPACK VAR INJECTION */
                }.call(exports, __webpack_require__(46)))

                /***/
            }),
            /* 137 */
            /***/
            (function(module, exports, __webpack_require__) {

                var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_DEFINE_RESULT__; // Generated by CoffeeScript 1.8.0
                (function() {
                    var Heap, defaultCmp, floor, heapify, heappop, heappush, heappushpop, heapreplace, insort, min, nlargest, nsmallest, updateItem, _siftdown, _siftup;

                    floor = Math.floor, min = Math.min;


                    /*
                    Default comparison function to be used
                     */

                    defaultCmp = function(x, y) {
                        if (x < y) {
                            return -1;
                        }
                        if (x > y) {
                            return 1;
                        }
                        return 0;
                    };


                    /*
                    Insert item x in list a, and keep it sorted assuming a is sorted.
        
                    If x is already in a, insert it to the right of the rightmost x.
        
                    Optional args lo (default 0) and hi (default a.length) bound the slice
                    of a to be searched.
                     */

                    insort = function(a, x, lo, hi, cmp) {
                        var mid;
                        if (lo == null) {
                            lo = 0;
                        }
                        if (cmp == null) {
                            cmp = defaultCmp;
                        }
                        if (lo < 0) {
                            throw new Error('lo must be non-negative');
                        }
                        if (hi == null) {
                            hi = a.length;
                        }
                        while (lo < hi) {
                            mid = floor((lo + hi) / 2);
                            if (cmp(x, a[mid]) < 0) {
                                hi = mid;
                            } else {
                                lo = mid + 1;
                            }
                        }
                        return ([].splice.apply(a, [lo, lo - lo].concat(x)), x);
                    };


                    /*
                    Push item onto heap, maintaining the heap invariant.
                     */

                    heappush = function(array, item, cmp) {
                        if (cmp == null) {
                            cmp = defaultCmp;
                        }
                        array.push(item);
                        return _siftdown(array, 0, array.length - 1, cmp);
                    };


                    /*
                    Pop the smallest item off the heap, maintaining the heap invariant.
                     */

                    heappop = function(array, cmp) {
                        var lastelt, returnitem;
                        if (cmp == null) {
                            cmp = defaultCmp;
                        }
                        lastelt = array.pop();
                        if (array.length) {
                            returnitem = array[0];
                            array[0] = lastelt;
                            _siftup(array, 0, cmp);
                        } else {
                            returnitem = lastelt;
                        }
                        return returnitem;
                    };


                    /*
                    Pop and return the current smallest value, and add the new item.
        
                    This is more efficient than heappop() followed by heappush(), and can be
                    more appropriate when using a fixed size heap. Note that the value
                    returned may be larger than item! That constrains reasonable use of
                    this routine unless written as part of a conditional replacement:
                        if item > array[0]
                          item = heapreplace(array, item)
                     */

                    heapreplace = function(array, item, cmp) {
                        var returnitem;
                        if (cmp == null) {
                            cmp = defaultCmp;
                        }
                        returnitem = array[0];
                        array[0] = item;
                        _siftup(array, 0, cmp);
                        return returnitem;
                    };


                    /*
                    Fast version of a heappush followed by a heappop.
                     */

                    heappushpop = function(array, item, cmp) {
                        var _ref;
                        if (cmp == null) {
                            cmp = defaultCmp;
                        }
                        if (array.length && cmp(array[0], item) < 0) {
                            _ref = [array[0], item], item = _ref[0], array[0] = _ref[1];
                            _siftup(array, 0, cmp);
                        }
                        return item;
                    };


                    /*
                    Transform list into a heap, in-place, in O(array.length) time.
                     */

                    heapify = function(array, cmp) {
                        var i, _i, _j, _len, _ref, _ref1, _results, _results1;
                        if (cmp == null) {
                            cmp = defaultCmp;
                        }
                        _ref1 = (function() {
                            _results1 = [];
                            for (var _j = 0, _ref = floor(array.length / 2); 0 <= _ref ? _j < _ref : _j > _ref; 0 <= _ref ? _j++ : _j--) { _results1.push(_j); }
                            return _results1;
                        }).apply(this).reverse();
                        _results = [];
                        for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
                            i = _ref1[_i];
                            _results.push(_siftup(array, i, cmp));
                        }
                        return _results;
                    };


                    /*
                    Update the position of the given item in the heap.
                    This function should be called every time the item is being modified.
                     */

                    updateItem = function(array, item, cmp) {
                        var pos;
                        if (cmp == null) {
                            cmp = defaultCmp;
                        }
                        pos = array.indexOf(item);
                        if (pos === -1) {
                            return;
                        }
                        _siftdown(array, 0, pos, cmp);
                        return _siftup(array, pos, cmp);
                    };


                    /*
                    Find the n largest elements in a dataset.
                     */

                    nlargest = function(array, n, cmp) {
                        var elem, result, _i, _len, _ref;
                        if (cmp == null) {
                            cmp = defaultCmp;
                        }
                        result = array.slice(0, n);
                        if (!result.length) {
                            return result;
                        }
                        heapify(result, cmp);
                        _ref = array.slice(n);
                        for (_i = 0, _len = _ref.length; _i < _len; _i++) {
                            elem = _ref[_i];
                            heappushpop(result, elem, cmp);
                        }
                        return result.sort(cmp).reverse();
                    };


                    /*
                    Find the n smallest elements in a dataset.
                     */

                    nsmallest = function(array, n, cmp) {
                        var elem, i, los, result, _i, _j, _len, _ref, _ref1, _results;
                        if (cmp == null) {
                            cmp = defaultCmp;
                        }
                        if (n * 10 <= array.length) {
                            result = array.slice(0, n).sort(cmp);
                            if (!result.length) {
                                return result;
                            }
                            los = result[result.length - 1];
                            _ref = array.slice(n);
                            for (_i = 0, _len = _ref.length; _i < _len; _i++) {
                                elem = _ref[_i];
                                if (cmp(elem, los) < 0) {
                                    insort(result, elem, 0, null, cmp);
                                    result.pop();
                                    los = result[result.length - 1];
                                }
                            }
                            return result;
                        }
                        heapify(array, cmp);
                        _results = [];
                        for (i = _j = 0, _ref1 = min(n, array.length); 0 <= _ref1 ? _j < _ref1 : _j > _ref1; i = 0 <= _ref1 ? ++_j : --_j) {
                            _results.push(heappop(array, cmp));
                        }
                        return _results;
                    };

                    _siftdown = function(array, startpos, pos, cmp) {
                        var newitem, parent, parentpos;
                        if (cmp == null) {
                            cmp = defaultCmp;
                        }
                        newitem = array[pos];
                        while (pos > startpos) {
                            parentpos = (pos - 1) >> 1;
                            parent = array[parentpos];
                            if (cmp(newitem, parent) < 0) {
                                array[pos] = parent;
                                pos = parentpos;
                                continue;
                            }
                            break;
                        }
                        return array[pos] = newitem;
                    };

                    _siftup = function(array, pos, cmp) {
                        var childpos, endpos, newitem, rightpos, startpos;
                        if (cmp == null) {
                            cmp = defaultCmp;
                        }
                        endpos = array.length;
                        startpos = pos;
                        newitem = array[pos];
                        childpos = 2 * pos + 1;
                        while (childpos < endpos) {
                            rightpos = childpos + 1;
                            if (rightpos < endpos && !(cmp(array[childpos], array[rightpos]) < 0)) {
                                childpos = rightpos;
                            }
                            array[pos] = array[childpos];
                            pos = childpos;
                            childpos = 2 * pos + 1;
                        }
                        array[pos] = newitem;
                        return _siftdown(array, startpos, pos, cmp);
                    };

                    Heap = (function() {
                        Heap.push = heappush;

                        Heap.pop = heappop;

                        Heap.replace = heapreplace;

                        Heap.pushpop = heappushpop;

                        Heap.heapify = heapify;

                        Heap.updateItem = updateItem;

                        Heap.nlargest = nlargest;

                        Heap.nsmallest = nsmallest;

                        function Heap(cmp) {
                            this.cmp = cmp != null ? cmp : defaultCmp;
                            this.nodes = [];
                        }

                        Heap.prototype.push = function(x) {
                            return heappush(this.nodes, x, this.cmp);
                        };

                        Heap.prototype.pop = function() {
                            return heappop(this.nodes, this.cmp);
                        };

                        Heap.prototype.peek = function() {
                            return this.nodes[0];
                        };

                        Heap.prototype.contains = function(x) {
                            return this.nodes.indexOf(x) !== -1;
                        };

                        Heap.prototype.replace = function(x) {
                            return heapreplace(this.nodes, x, this.cmp);
                        };

                        Heap.prototype.pushpop = function(x) {
                            return heappushpop(this.nodes, x, this.cmp);
                        };

                        Heap.prototype.heapify = function() {
                            return heapify(this.nodes, this.cmp);
                        };

                        Heap.prototype.updateItem = function(x) {
                            return updateItem(this.nodes, x, this.cmp);
                        };

                        Heap.prototype.clear = function() {
                            return this.nodes = [];
                        };

                        Heap.prototype.empty = function() {
                            return this.nodes.length === 0;
                        };

                        Heap.prototype.size = function() {
                            return this.nodes.length;
                        };

                        Heap.prototype.clone = function() {
                            var heap;
                            heap = new Heap();
                            heap.nodes = this.nodes.slice(0);
                            return heap;
                        };

                        Heap.prototype.toArray = function() {
                            return this.nodes.slice(0);
                        };

                        Heap.prototype.insert = Heap.prototype.push;

                        Heap.prototype.top = Heap.prototype.peek;

                        Heap.prototype.front = Heap.prototype.peek;

                        Heap.prototype.has = Heap.prototype.contains;

                        Heap.prototype.copy = Heap.prototype.clone;

                        return Heap;

                    })();

                    (function(root, factory) {
                        if (true) {
                            return !(__WEBPACK_AMD_DEFINE_ARRAY__ = [], __WEBPACK_AMD_DEFINE_FACTORY__ = (factory),
                                __WEBPACK_AMD_DEFINE_RESULT__ = (typeof __WEBPACK_AMD_DEFINE_FACTORY__ === 'function' ?
                                    (__WEBPACK_AMD_DEFINE_FACTORY__.apply(exports, __WEBPACK_AMD_DEFINE_ARRAY__)) : __WEBPACK_AMD_DEFINE_FACTORY__),
                                __WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
                        } else if (typeof exports === 'object') {
                            return module.exports = factory();
                        } else {
                            return root.Heap = factory();
                        }
                    })(this, function() {
                        return Heap;
                    });

                }).call(this);


                /***/
            }),
            /* 138 */
            /***/
            (function(module, exports, __webpack_require__) {

                var require;
                var require;
                (function(f) {
                    if (true) { module.exports = f() } else if (typeof define === "function" && define.amd) { define([], f) } else {
                        var g;
                        if (typeof window !== "undefined") { g = window } else if (typeof global !== "undefined") { g = global } else if (typeof self !== "undefined") { g = self } else { g = this }
                        g.cola = f()
                    }
                })(function() {
                    var define, module, exports;
                    return (function e(t, n, r) {
                        function s(o, u) {
                            if (!n[o]) {
                                if (!t[o]) { var a = typeof require == "function" && require; if (!u && a) return require(o, !0); if (i) return i(o, !0); var f = new Error("Cannot find module '" + o + "'"); throw f.code = "MODULE_NOT_FOUND", f }
                                var l = n[o] = { exports: {} };
                                t[o][0].call(l.exports, function(e) { var n = t[o][1][e]; return s(n ? n : e) }, l, l.exports, e, t, n, r)
                            }
                            return n[o].exports
                        }
                        var i = typeof require == "function" && require;
                        for (var o = 0; o < r.length; o++) s(r[o]);
                        return s
                    })({
                        1: [function(require, module, exports) {
                            "use strict";

                            function __export(m) {
                                for (var p in m)
                                    if (!exports.hasOwnProperty(p)) exports[p] = m[p];
                            }
                            __export(require("./src/adaptor"));
                            __export(require("./src/d3adaptor"));
                            __export(require("./src/descent"));
                            __export(require("./src/geom"));
                            __export(require("./src/gridrouter"));
                            __export(require("./src/handledisconnected"));
                            __export(require("./src/layout"));
                            __export(require("./src/layout3d"));
                            __export(require("./src/linklengths"));
                            __export(require("./src/powergraph"));
                            __export(require("./src/pqueue"));
                            __export(require("./src/rbtree"));
                            __export(require("./src/rectangle"));
                            __export(require("./src/shortestpaths"));
                            __export(require("./src/vpsc"));

                        }, { "./src/adaptor": 2, "./src/d3adaptor": 3, "./src/descent": 6, "./src/geom": 7, "./src/gridrouter": 8, "./src/handledisconnected": 9, "./src/layout": 10, "./src/layout3d": 11, "./src/linklengths": 12, "./src/powergraph": 13, "./src/pqueue": 14, "./src/rbtree": 15, "./src/rectangle": 16, "./src/shortestpaths": 17, "./src/vpsc": 18 }],
                        2: [function(require, module, exports) {
                            "use strict";
                            var __extends = (this && this.__extends) || function(d, b) {
                                for (var p in b)
                                    if (b.hasOwnProperty(p)) d[p] = b[p];

                                function __() { this.constructor = d; }
                                d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
                            };
                            var layout_1 = require("./layout");
                            var LayoutAdaptor = (function(_super) {
                                __extends(LayoutAdaptor, _super);

                                function LayoutAdaptor(options) {
                                    var _this = _super.call(this) || this;
                                    var self = _this;
                                    var o = options;
                                    if (o.trigger) {
                                        _this.trigger = o.trigger;
                                    }
                                    if (o.kick) {
                                        _this.kick = o.kick;
                                    }
                                    if (o.drag) {
                                        _this.drag = o.drag;
                                    }
                                    if (o.on) {
                                        _this.on = o.on;
                                    }
                                    _this.dragstart = _this.dragStart = layout_1.Layout.dragStart;
                                    _this.dragend = _this.dragEnd = layout_1.Layout.dragEnd;
                                    return _this;
                                }
                                LayoutAdaptor.prototype.trigger = function(e) {};;
                                LayoutAdaptor.prototype.kick = function() {};;
                                LayoutAdaptor.prototype.drag = function() {};;
                                LayoutAdaptor.prototype.on = function(eventType, listener) { return this; };;
                                return LayoutAdaptor;
                            }(layout_1.Layout));
                            exports.LayoutAdaptor = LayoutAdaptor;

                            function adaptor(options) {
                                return new LayoutAdaptor(options);
                            }
                            exports.adaptor = adaptor;

                        }, { "./layout": 10 }],
                        3: [function(require, module, exports) {
                            "use strict";
                            var d3v3 = require("./d3v3adaptor");
                            var d3v4 = require("./d3v4adaptor");;

                            function d3adaptor(d3Context) {
                                if (!d3Context || isD3V3(d3Context)) {
                                    return new d3v3.D3StyleLayoutAdaptor();
                                }
                                return new d3v4.D3StyleLayoutAdaptor(d3Context);
                            }
                            exports.d3adaptor = d3adaptor;

                            function isD3V3(d3Context) {
                                var v3exp = /^3\./;
                                return d3Context.version && d3Context.version.match(v3exp) !== null;
                            }

                        }, { "./d3v3adaptor": 4, "./d3v4adaptor": 5 }],
                        4: [function(require, module, exports) {
                            "use strict";
                            var __extends = (this && this.__extends) || function(d, b) {
                                for (var p in b)
                                    if (b.hasOwnProperty(p)) d[p] = b[p];

                                function __() { this.constructor = d; }
                                d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
                            };
                            var layout_1 = require("./layout");
                            var D3StyleLayoutAdaptor = (function(_super) {
                                __extends(D3StyleLayoutAdaptor, _super);

                                function D3StyleLayoutAdaptor() {
                                    var _this = _super.call(this) || this;
                                    _this.event = d3.dispatch(layout_1.EventType[layout_1.EventType.start], layout_1.EventType[layout_1.EventType.tick], layout_1.EventType[layout_1.EventType.end]);
                                    var d3layout = _this;
                                    var drag;
                                    _this.drag = function() {
                                        if (!drag) {
                                            var drag = d3.behavior.drag()
                                                .origin(layout_1.Layout.dragOrigin)
                                                .on("dragstart.d3adaptor", layout_1.Layout.dragStart)
                                                .on("drag.d3adaptor", function(d) {
                                                    layout_1.Layout.drag(d, d3.event);
                                                    d3layout.resume();
                                                })
                                                .on("dragend.d3adaptor", layout_1.Layout.dragEnd);
                                        }
                                        if (!arguments.length)
                                            return drag;
                                        this
                                            .call(drag);
                                    };
                                    return _this;
                                }
                                D3StyleLayoutAdaptor.prototype.trigger = function(e) {
                                    var d3event = { type: layout_1.EventType[e.type], alpha: e.alpha, stress: e.stress };
                                    this.event[d3event.type](d3event);
                                };
                                D3StyleLayoutAdaptor.prototype.kick = function() {
                                    var _this = this;
                                    d3.timer(function() { return _super.prototype.tick.call(_this); });
                                };
                                D3StyleLayoutAdaptor.prototype.on = function(eventType, listener) {
                                    if (typeof eventType === 'string') {
                                        this.event.on(eventType, listener);
                                    } else {
                                        this.event.on(layout_1.EventType[eventType], listener);
                                    }
                                    return this;
                                };
                                return D3StyleLayoutAdaptor;
                            }(layout_1.Layout));
                            exports.D3StyleLayoutAdaptor = D3StyleLayoutAdaptor;

                            function d3adaptor() {
                                return new D3StyleLayoutAdaptor();
                            }
                            exports.d3adaptor = d3adaptor;

                        }, { "./layout": 10 }],
                        5: [function(require, module, exports) {
                            "use strict";
                            var __extends = (this && this.__extends) || function(d, b) {
                                for (var p in b)
                                    if (b.hasOwnProperty(p)) d[p] = b[p];

                                function __() { this.constructor = d; }
                                d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
                            };
                            var layout_1 = require("./layout");
                            var D3StyleLayoutAdaptor = (function(_super) {
                                __extends(D3StyleLayoutAdaptor, _super);

                                function D3StyleLayoutAdaptor(d3Context) {
                                    var _this = _super.call(this) || this;
                                    _this.d3Context = d3Context;
                                    _this.event = d3Context.dispatch(layout_1.EventType[layout_1.EventType.start], layout_1.EventType[layout_1.EventType.tick], layout_1.EventType[layout_1.EventType.end]);
                                    var d3layout = _this;
                                    var drag;
                                    _this.drag = function() {
                                        if (!drag) {
                                            var drag = d3Context.drag()
                                                .subject(layout_1.Layout.dragOrigin)
                                                .on("start.d3adaptor", layout_1.Layout.dragStart)
                                                .on("drag.d3adaptor", function(d) {
                                                    layout_1.Layout.drag(d, d3Context.event);
                                                    d3layout.resume();
                                                })
                                                .on("end.d3adaptor", layout_1.Layout.dragEnd);
                                        }
                                        if (!arguments.length)
                                            return drag;
                                        arguments[0].call(drag);
                                    };
                                    return _this;
                                }
                                D3StyleLayoutAdaptor.prototype.trigger = function(e) {
                                    var d3event = { type: layout_1.EventType[e.type], alpha: e.alpha, stress: e.stress };
                                    this.event.call(d3event.type, d3event);
                                };
                                D3StyleLayoutAdaptor.prototype.kick = function() {
                                    var _this = this;
                                    this.d3Context.timer(function() { return _super.prototype.tick.call(_this); });
                                };
                                D3StyleLayoutAdaptor.prototype.on = function(eventType, listener) {
                                    if (typeof eventType === 'string') {
                                        this.event.on(eventType, listener);
                                    } else {
                                        this.event.on(layout_1.EventType[eventType], listener);
                                    }
                                    return this;
                                };
                                return D3StyleLayoutAdaptor;
                            }(layout_1.Layout));
                            exports.D3StyleLayoutAdaptor = D3StyleLayoutAdaptor;

                        }, { "./layout": 10 }],
                        6: [function(require, module, exports) {
                            "use strict";
                            var Locks = (function() {
                                function Locks() {
                                    this.locks = {};
                                }
                                Locks.prototype.add = function(id, x) {
                                    this.locks[id] = x;
                                };
                                Locks.prototype.clear = function() {
                                    this.locks = {};
                                };
                                Locks.prototype.isEmpty = function() {
                                    for (var l in this.locks)
                                        return false;
                                    return true;
                                };
                                Locks.prototype.apply = function(f) {
                                    for (var l in this.locks) {
                                        f(Number(l), this.locks[l]);
                                    }
                                };
                                return Locks;
                            }());
                            exports.Locks = Locks;
                            var Descent = (function() {
                                function Descent(x, D, G) {
                                    if (G === void 0) { G = null; }
                                    this.D = D;
                                    this.G = G;
                                    this.threshold = 0.0001;
                                    this.numGridSnapNodes = 0;
                                    this.snapGridSize = 100;
                                    this.snapStrength = 1000;
                                    this.scaleSnapByMaxH = false;
                                    this.random = new PseudoRandom();
                                    this.project = null;
                                    this.x = x;
                                    this.k = x.length;
                                    var n = this.n = x[0].length;
                                    this.H = new Array(this.k);
                                    this.g = new Array(this.k);
                                    this.Hd = new Array(this.k);
                                    this.a = new Array(this.k);
                                    this.b = new Array(this.k);
                                    this.c = new Array(this.k);
                                    this.d = new Array(this.k);
                                    this.e = new Array(this.k);
                                    this.ia = new Array(this.k);
                                    this.ib = new Array(this.k);
                                    this.xtmp = new Array(this.k);
                                    this.locks = new Locks();
                                    this.minD = Number.MAX_VALUE;
                                    var i = n,
                                        j;
                                    while (i--) {
                                        j = n;
                                        while (--j > i) {
                                            var d = D[i][j];
                                            if (d > 0 && d < this.minD) {
                                                this.minD = d;
                                            }
                                        }
                                    }
                                    if (this.minD === Number.MAX_VALUE)
                                        this.minD = 1;
                                    i = this.k;
                                    while (i--) {
                                        this.g[i] = new Array(n);
                                        this.H[i] = new Array(n);
                                        j = n;
                                        while (j--) {
                                            this.H[i][j] = new Array(n);
                                        }
                                        this.Hd[i] = new Array(n);
                                        this.a[i] = new Array(n);
                                        this.b[i] = new Array(n);
                                        this.c[i] = new Array(n);
                                        this.d[i] = new Array(n);
                                        this.e[i] = new Array(n);
                                        this.ia[i] = new Array(n);
                                        this.ib[i] = new Array(n);
                                        this.xtmp[i] = new Array(n);
                                    }
                                }
                                Descent.createSquareMatrix = function(n, f) {
                                    var M = new Array(n);
                                    for (var i = 0; i < n; ++i) {
                                        M[i] = new Array(n);
                                        for (var j = 0; j < n; ++j) {
                                            M[i][j] = f(i, j);
                                        }
                                    }
                                    return M;
                                };
                                Descent.prototype.offsetDir = function() {
                                    var _this = this;
                                    var u = new Array(this.k);
                                    var l = 0;
                                    for (var i = 0; i < this.k; ++i) {
                                        var x = u[i] = this.random.getNextBetween(0.01, 1) - 0.5;
                                        l += x * x;
                                    }
                                    l = Math.sqrt(l);
                                    return u.map(function(x) { return x *= _this.minD / l; });
                                };
                                Descent.prototype.computeDerivatives = function(x) {
                                    var _this = this;
                                    var n = this.n;
                                    if (n < 1)
                                        return;
                                    var i;
                                    var d = new Array(this.k);
                                    var d2 = new Array(this.k);
                                    var Huu = new Array(this.k);
                                    var maxH = 0;
                                    for (var u = 0; u < n; ++u) {
                                        for (i = 0; i < this.k; ++i)
                                            Huu[i] = this.g[i][u] = 0;
                                        for (var v = 0; v < n; ++v) {
                                            if (u === v)
                                                continue;
                                            var maxDisplaces = n;
                                            while (maxDisplaces--) {
                                                var sd2 = 0;
                                                for (i = 0; i < this.k; ++i) {
                                                    var dx = d[i] = x[i][u] - x[i][v];
                                                    sd2 += d2[i] = dx * dx;
                                                }
                                                if (sd2 > 1e-9)
                                                    break;
                                                var rd = this.offsetDir();
                                                for (i = 0; i < this.k; ++i)
                                                    x[i][v] += rd[i];
                                            }
                                            var l = Math.sqrt(sd2);
                                            var D = this.D[u][v];
                                            var weight = this.G != null ? this.G[u][v] : 1;
                                            if (weight > 1 && l > D || !isFinite(D)) {
                                                for (i = 0; i < this.k; ++i)
                                                    this.H[i][u][v] = 0;
                                                continue;
                                            }
                                            if (weight > 1) {
                                                weight = 1;
                                            }
                                            var D2 = D * D;
                                            var gs = 2 * weight * (l - D) / (D2 * l);
                                            var l3 = l * l * l;
                                            var hs = 2 * -weight / (D2 * l3);
                                            if (!isFinite(gs))
                                                console.log(gs);
                                            for (i = 0; i < this.k; ++i) {
                                                this.g[i][u] += d[i] * gs;
                                                Huu[i] -= this.H[i][u][v] = hs * (l3 + D * (d2[i] - sd2) + l * sd2);
                                            }
                                        }
                                        for (i = 0; i < this.k; ++i)
                                            maxH = Math.max(maxH, this.H[i][u][u] = Huu[i]);
                                    }
                                    var r = this.snapGridSize / 2;
                                    var g = this.snapGridSize;
                                    var w = this.snapStrength;
                                    var k = w / (r * r);
                                    var numNodes = this.numGridSnapNodes;
                                    for (var u = 0; u < numNodes; ++u) {
                                        for (i = 0; i < this.k; ++i) {
                                            var xiu = this.x[i][u];
                                            var m = xiu / g;
                                            var f = m % 1;
                                            var q = m - f;
                                            var a = Math.abs(f);
                                            var dx = (a <= 0.5) ? xiu - q * g :
                                                (xiu > 0) ? xiu - (q + 1) * g : xiu - (q - 1) * g;
                                            if (-r < dx && dx <= r) {
                                                if (this.scaleSnapByMaxH) {
                                                    this.g[i][u] += maxH * k * dx;
                                                    this.H[i][u][u] += maxH * k;
                                                } else {
                                                    this.g[i][u] += k * dx;
                                                    this.H[i][u][u] += k;
                                                }
                                            }
                                        }
                                    }
                                    if (!this.locks.isEmpty()) {
                                        this.locks.apply(function(u, p) {
                                            for (i = 0; i < _this.k; ++i) {
                                                _this.H[i][u][u] += maxH;
                                                _this.g[i][u] -= maxH * (p[i] - x[i][u]);
                                            }
                                        });
                                    }
                                };
                                Descent.dotProd = function(a, b) {
                                    var x = 0,
                                        i = a.length;
                                    while (i--)
                                        x += a[i] * b[i];
                                    return x;
                                };
                                Descent.rightMultiply = function(m, v, r) {
                                    var i = m.length;
                                    while (i--)
                                        r[i] = Descent.dotProd(m[i], v);
                                };
                                Descent.prototype.computeStepSize = function(d) {
                                    var numerator = 0,
                                        denominator = 0;
                                    for (var i = 0; i < this.k; ++i) {
                                        numerator += Descent.dotProd(this.g[i], d[i]);
                                        Descent.rightMultiply(this.H[i], d[i], this.Hd[i]);
                                        denominator += Descent.dotProd(d[i], this.Hd[i]);
                                    }
                                    if (denominator === 0 || !isFinite(denominator))
                                        return 0;
                                    return 1 * numerator / denominator;
                                };
                                Descent.prototype.reduceStress = function() {
                                    this.computeDerivatives(this.x);
                                    var alpha = this.computeStepSize(this.g);
                                    for (var i = 0; i < this.k; ++i) {
                                        this.takeDescentStep(this.x[i], this.g[i], alpha);
                                    }
                                    return this.computeStress();
                                };
                                Descent.copy = function(a, b) {
                                    var m = a.length,
                                        n = b[0].length;
                                    for (var i = 0; i < m; ++i) {
                                        for (var j = 0; j < n; ++j) {
                                            b[i][j] = a[i][j];
                                        }
                                    }
                                };
                                Descent.prototype.stepAndProject = function(x0, r, d, stepSize) {
                                    Descent.copy(x0, r);
                                    this.takeDescentStep(r[0], d[0], stepSize);
                                    if (this.project)
                                        this.project[0](x0[0], x0[1], r[0]);
                                    this.takeDescentStep(r[1], d[1], stepSize);
                                    if (this.project)
                                        this.project[1](r[0], x0[1], r[1]);
                                    for (var i = 2; i < this.k; i++)
                                        this.takeDescentStep(r[i], d[i], stepSize);
                                };
                                Descent.mApply = function(m, n, f) {
                                    var i = m;
                                    while (i-- > 0) {
                                        var j = n;
                                        while (j-- > 0)
                                            f(i, j);
                                    }
                                };
                                Descent.prototype.matrixApply = function(f) {
                                    Descent.mApply(this.k, this.n, f);
                                };
                                Descent.prototype.computeNextPosition = function(x0, r) {
                                    var _this = this;
                                    this.computeDerivatives(x0);
                                    var alpha = this.computeStepSize(this.g);
                                    this.stepAndProject(x0, r, this.g, alpha);
                                    if (this.project) {
                                        this.matrixApply(function(i, j) { return _this.e[i][j] = x0[i][j] - r[i][j]; });
                                        var beta = this.computeStepSize(this.e);
                                        beta = Math.max(0.2, Math.min(beta, 1));
                                        this.stepAndProject(x0, r, this.e, beta);
                                    }
                                };
                                Descent.prototype.run = function(iterations) {
                                    var stress = Number.MAX_VALUE,
                                        converged = false;
                                    while (!converged && iterations-- > 0) {
                                        var s = this.rungeKutta();
                                        converged = Math.abs(stress / s - 1) < this.threshold;
                                        stress = s;
                                    }
                                    return stress;
                                };
                                Descent.prototype.rungeKutta = function() {
                                    var _this = this;
                                    this.computeNextPosition(this.x, this.a);
                                    Descent.mid(this.x, this.a, this.ia);
                                    this.computeNextPosition(this.ia, this.b);
                                    Descent.mid(this.x, this.b, this.ib);
                                    this.computeNextPosition(this.ib, this.c);
                                    this.computeNextPosition(this.c, this.d);
                                    var disp = 0;
                                    this.matrixApply(function(i, j) {
                                        var x = (_this.a[i][j] + 2.0 * _this.b[i][j] + 2.0 * _this.c[i][j] + _this.d[i][j]) / 6.0,
                                            d = _this.x[i][j] - x;
                                        disp += d * d;
                                        _this.x[i][j] = x;
                                    });
                                    return disp;
                                };
                                Descent.mid = function(a, b, m) {
                                    Descent.mApply(a.length, a[0].length, function(i, j) {
                                        return m[i][j] = a[i][j] + (b[i][j] - a[i][j]) / 2.0;
                                    });
                                };
                                Descent.prototype.takeDescentStep = function(x, d, stepSize) {
                                    for (var i = 0; i < this.n; ++i) {
                                        x[i] = x[i] - stepSize * d[i];
                                    }
                                };
                                Descent.prototype.computeStress = function() {
                                    var stress = 0;
                                    for (var u = 0, nMinus1 = this.n - 1; u < nMinus1; ++u) {
                                        for (var v = u + 1, n = this.n; v < n; ++v) {
                                            var l = 0;
                                            for (var i = 0; i < this.k; ++i) {
                                                var dx = this.x[i][u] - this.x[i][v];
                                                l += dx * dx;
                                            }
                                            l = Math.sqrt(l);
                                            var d = this.D[u][v];
                                            if (!isFinite(d))
                                                continue;
                                            var rl = d - l;
                                            var d2 = d * d;
                                            stress += rl * rl / d2;
                                        }
                                    }
                                    return stress;
                                };
                                return Descent;
                            }());
                            Descent.zeroDistance = 1e-10;
                            exports.Descent = Descent;
                            var PseudoRandom = (function() {
                                function PseudoRandom(seed) {
                                    if (seed === void 0) { seed = 1; }
                                    this.seed = seed;
                                    this.a = 214013;
                                    this.c = 2531011;
                                    this.m = 2147483648;
                                    this.range = 32767;
                                }
                                PseudoRandom.prototype.getNext = function() {
                                    this.seed = (this.seed * this.a + this.c) % this.m;
                                    return (this.seed >> 16) / this.range;
                                };
                                PseudoRandom.prototype.getNextBetween = function(min, max) {
                                    return min + this.getNext() * (max - min);
                                };
                                return PseudoRandom;
                            }());
                            exports.PseudoRandom = PseudoRandom;

                        }, {}],
                        7: [function(require, module, exports) {
                            "use strict";
                            var __extends = (this && this.__extends) || function(d, b) {
                                for (var p in b)
                                    if (b.hasOwnProperty(p)) d[p] = b[p];

                                function __() { this.constructor = d; }
                                d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
                            };
                            var rectangle_1 = require("./rectangle");
                            var Point = (function() {
                                function Point() {}
                                return Point;
                            }());
                            exports.Point = Point;
                            var LineSegment = (function() {
                                function LineSegment(x1, y1, x2, y2) {
                                    this.x1 = x1;
                                    this.y1 = y1;
                                    this.x2 = x2;
                                    this.y2 = y2;
                                }
                                return LineSegment;
                            }());
                            exports.LineSegment = LineSegment;
                            var PolyPoint = (function(_super) {
                                __extends(PolyPoint, _super);

                                function PolyPoint() {
                                    return _super.apply(this, arguments) || this;
                                }
                                return PolyPoint;
                            }(Point));
                            exports.PolyPoint = PolyPoint;

                            function isLeft(P0, P1, P2) {
                                return (P1.x - P0.x) * (P2.y - P0.y) - (P2.x - P0.x) * (P1.y - P0.y);
                            }
                            exports.isLeft = isLeft;

                            function above(p, vi, vj) {
                                return isLeft(p, vi, vj) > 0;
                            }

                            function below(p, vi, vj) {
                                return isLeft(p, vi, vj) < 0;
                            }

                            function ConvexHull(S) {
                                var P = S.slice(0).sort(function(a, b) { return a.x !== b.x ? b.x - a.x : b.y - a.y; });
                                var n = S.length,
                                    i;
                                var minmin = 0;
                                var xmin = P[0].x;
                                for (i = 1; i < n; ++i) {
                                    if (P[i].x !== xmin)
                                        break;
                                }
                                var minmax = i - 1;
                                var H = [];
                                H.push(P[minmin]);
                                if (minmax === n - 1) {
                                    if (P[minmax].y !== P[minmin].y)
                                        H.push(P[minmax]);
                                } else {
                                    var maxmin, maxmax = n - 1;
                                    var xmax = P[n - 1].x;
                                    for (i = n - 2; i >= 0; i--)
                                        if (P[i].x !== xmax)
                                            break;
                                    maxmin = i + 1;
                                    i = minmax;
                                    while (++i <= maxmin) {
                                        if (isLeft(P[minmin], P[maxmin], P[i]) >= 0 && i < maxmin)
                                            continue;
                                        while (H.length > 1) {
                                            if (isLeft(H[H.length - 2], H[H.length - 1], P[i]) > 0)
                                                break;
                                            else
                                                H.length -= 1;
                                        }
                                        if (i != minmin)
                                            H.push(P[i]);
                                    }
                                    if (maxmax != maxmin)
                                        H.push(P[maxmax]);
                                    var bot = H.length;
                                    i = maxmin;
                                    while (--i >= minmax) {
                                        if (isLeft(P[maxmax], P[minmax], P[i]) >= 0 && i > minmax)
                                            continue;
                                        while (H.length > bot) {
                                            if (isLeft(H[H.length - 2], H[H.length - 1], P[i]) > 0)
                                                break;
                                            else
                                                H.length -= 1;
                                        }
                                        if (i != minmin)
                                            H.push(P[i]);
                                    }
                                }
                                return H;
                            }
                            exports.ConvexHull = ConvexHull;

                            function clockwiseRadialSweep(p, P, f) {
                                P.slice(0).sort(function(a, b) { return Math.atan2(a.y - p.y, a.x - p.x) - Math.atan2(b.y - p.y, b.x - p.x); }).forEach(f);
                            }
                            exports.clockwiseRadialSweep = clockwiseRadialSweep;

                            function nextPolyPoint(p, ps) {
                                if (p.polyIndex === ps.length - 1)
                                    return ps[0];
                                return ps[p.polyIndex + 1];
                            }

                            function prevPolyPoint(p, ps) {
                                if (p.polyIndex === 0)
                                    return ps[ps.length - 1];
                                return ps[p.polyIndex - 1];
                            }

                            function tangent_PointPolyC(P, V) {
                                return { rtan: Rtangent_PointPolyC(P, V), ltan: Ltangent_PointPolyC(P, V) };
                            }

                            function Rtangent_PointPolyC(P, V) {
                                var n = V.length - 1;
                                var a, b, c;
                                var upA, dnC;
                                if (below(P, V[1], V[0]) && !above(P, V[n - 1], V[0]))
                                    return 0;
                                for (a = 0, b = n;;) {
                                    if (b - a === 1)
                                        if (above(P, V[a], V[b]))
                                            return a;
                                        else
                                            return b;
                                    c = Math.floor((a + b) / 2);
                                    dnC = below(P, V[c + 1], V[c]);
                                    if (dnC && !above(P, V[c - 1], V[c]))
                                        return c;
                                    upA = above(P, V[a + 1], V[a]);
                                    if (upA) {
                                        if (dnC)
                                            b = c;
                                        else {
                                            if (above(P, V[a], V[c]))
                                                b = c;
                                            else
                                                a = c;
                                        }
                                    } else {
                                        if (!dnC)
                                            a = c;
                                        else {
                                            if (below(P, V[a], V[c]))
                                                b = c;
                                            else
                                                a = c;
                                        }
                                    }
                                }
                            }

                            function Ltangent_PointPolyC(P, V) {
                                var n = V.length - 1;
                                var a, b, c;
                                var dnA, dnC;
                                if (above(P, V[n - 1], V[0]) && !below(P, V[1], V[0]))
                                    return 0;
                                for (a = 0, b = n;;) {
                                    if (b - a === 1)
                                        if (below(P, V[a], V[b]))
                                            return a;
                                        else
                                            return b;
                                    c = Math.floor((a + b) / 2);
                                    dnC = below(P, V[c + 1], V[c]);
                                    if (above(P, V[c - 1], V[c]) && !dnC)
                                        return c;
                                    dnA = below(P, V[a + 1], V[a]);
                                    if (dnA) {
                                        if (!dnC)
                                            b = c;
                                        else {
                                            if (below(P, V[a], V[c]))
                                                b = c;
                                            else
                                                a = c;
                                        }
                                    } else {
                                        if (dnC)
                                            a = c;
                                        else {
                                            if (above(P, V[a], V[c]))
                                                b = c;
                                            else
                                                a = c;
                                        }
                                    }
                                }
                            }

                            function tangent_PolyPolyC(V, W, t1, t2, cmp1, cmp2) {
                                var ix1, ix2;
                                ix1 = t1(W[0], V);
                                ix2 = t2(V[ix1], W);
                                var done = false;
                                while (!done) {
                                    done = true;
                                    while (true) {
                                        if (ix1 === V.length - 1)
                                            ix1 = 0;
                                        if (cmp1(W[ix2], V[ix1], V[ix1 + 1]))
                                            break;
                                        ++ix1;
                                    }
                                    while (true) {
                                        if (ix2 === 0)
                                            ix2 = W.length - 1;
                                        if (cmp2(V[ix1], W[ix2], W[ix2 - 1]))
                                            break;
                                        --ix2;
                                        done = false;
                                    }
                                }
                                return { t1: ix1, t2: ix2 };
                            }
                            exports.tangent_PolyPolyC = tangent_PolyPolyC;

                            function LRtangent_PolyPolyC(V, W) {
                                var rl = RLtangent_PolyPolyC(W, V);
                                return { t1: rl.t2, t2: rl.t1 };
                            }
                            exports.LRtangent_PolyPolyC = LRtangent_PolyPolyC;

                            function RLtangent_PolyPolyC(V, W) {
                                return tangent_PolyPolyC(V, W, Rtangent_PointPolyC, Ltangent_PointPolyC, above, below);
                            }
                            exports.RLtangent_PolyPolyC = RLtangent_PolyPolyC;

                            function LLtangent_PolyPolyC(V, W) {
                                return tangent_PolyPolyC(V, W, Ltangent_PointPolyC, Ltangent_PointPolyC, below, below);
                            }
                            exports.LLtangent_PolyPolyC = LLtangent_PolyPolyC;

                            function RRtangent_PolyPolyC(V, W) {
                                return tangent_PolyPolyC(V, W, Rtangent_PointPolyC, Rtangent_PointPolyC, above, above);
                            }
                            exports.RRtangent_PolyPolyC = RRtangent_PolyPolyC;
                            var BiTangent = (function() {
                                function BiTangent(t1, t2) {
                                    this.t1 = t1;
                                    this.t2 = t2;
                                }
                                return BiTangent;
                            }());
                            exports.BiTangent = BiTangent;
                            var BiTangents = (function() {
                                function BiTangents() {}
                                return BiTangents;
                            }());
                            exports.BiTangents = BiTangents;
                            var TVGPoint = (function(_super) {
                                __extends(TVGPoint, _super);

                                function TVGPoint() {
                                    return _super.apply(this, arguments) || this;
                                }
                                return TVGPoint;
                            }(Point));
                            exports.TVGPoint = TVGPoint;
                            var VisibilityVertex = (function() {
                                function VisibilityVertex(id, polyid, polyvertid, p) {
                                    this.id = id;
                                    this.polyid = polyid;
                                    this.polyvertid = polyvertid;
                                    this.p = p;
                                    p.vv = this;
                                }
                                return VisibilityVertex;
                            }());
                            exports.VisibilityVertex = VisibilityVertex;
                            var VisibilityEdge = (function() {
                                function VisibilityEdge(source, target) {
                                    this.source = source;
                                    this.target = target;
                                }
                                VisibilityEdge.prototype.length = function() {
                                    var dx = this.source.p.x - this.target.p.x;
                                    var dy = this.source.p.y - this.target.p.y;
                                    return Math.sqrt(dx * dx + dy * dy);
                                };
                                return VisibilityEdge;
                            }());
                            exports.VisibilityEdge = VisibilityEdge;
                            var TangentVisibilityGraph = (function() {
                                function TangentVisibilityGraph(P, g0) {
                                    this.P = P;
                                    this.V = [];
                                    this.E = [];
                                    if (!g0) {
                                        var n = P.length;
                                        for (var i = 0; i < n; i++) {
                                            var p = P[i];
                                            for (var j = 0; j < p.length; ++j) {
                                                var pj = p[j],
                                                    vv = new VisibilityVertex(this.V.length, i, j, pj);
                                                this.V.push(vv);
                                                if (j > 0)
                                                    this.E.push(new VisibilityEdge(p[j - 1].vv, vv));
                                            }
                                        }
                                        for (var i = 0; i < n - 1; i++) {
                                            var Pi = P[i];
                                            for (var j = i + 1; j < n; j++) {
                                                var Pj = P[j],
                                                    t = tangents(Pi, Pj);
                                                for (var q in t) {
                                                    var c = t[q],
                                                        source = Pi[c.t1],
                                                        target = Pj[c.t2];
                                                    this.addEdgeIfVisible(source, target, i, j);
                                                }
                                            }
                                        }
                                    } else {
                                        this.V = g0.V.slice(0);
                                        this.E = g0.E.slice(0);
                                    }
                                }
                                TangentVisibilityGraph.prototype.addEdgeIfVisible = function(u, v, i1, i2) {
                                    if (!this.intersectsPolys(new LineSegment(u.x, u.y, v.x, v.y), i1, i2)) {
                                        this.E.push(new VisibilityEdge(u.vv, v.vv));
                                    }
                                };
                                TangentVisibilityGraph.prototype.addPoint = function(p, i1) {
                                    var n = this.P.length;
                                    this.V.push(new VisibilityVertex(this.V.length, n, 0, p));
                                    for (var i = 0; i < n; ++i) {
                                        if (i === i1)
                                            continue;
                                        var poly = this.P[i],
                                            t = tangent_PointPolyC(p, poly);
                                        this.addEdgeIfVisible(p, poly[t.ltan], i1, i);
                                        this.addEdgeIfVisible(p, poly[t.rtan], i1, i);
                                    }
                                    return p.vv;
                                };
                                TangentVisibilityGraph.prototype.intersectsPolys = function(l, i1, i2) {
                                    for (var i = 0, n = this.P.length; i < n; ++i) {
                                        if (i != i1 && i != i2 && intersects(l, this.P[i]).length > 0) {
                                            return true;
                                        }
                                    }
                                    return false;
                                };
                                return TangentVisibilityGraph;
                            }());
                            exports.TangentVisibilityGraph = TangentVisibilityGraph;

                            function intersects(l, P) {
                                var ints = [];
                                for (var i = 1, n = P.length; i < n; ++i) {
                                    var int = rectangle_1.Rectangle.lineIntersection(l.x1, l.y1, l.x2, l.y2, P[i - 1].x, P[i - 1].y, P[i].x, P[i].y);
                                    if (int)
                                        ints.push(int);
                                }
                                return ints;
                            }

                            function tangents(V, W) {
                                var m = V.length - 1,
                                    n = W.length - 1;
                                var bt = new BiTangents();
                                for (var i = 0; i < m; ++i) {
                                    for (var j = 0; j < n; ++j) {
                                        var v1 = V[i == 0 ? m - 1 : i - 1];
                                        var v2 = V[i];
                                        var v3 = V[i + 1];
                                        var w1 = W[j == 0 ? n - 1 : j - 1];
                                        var w2 = W[j];
                                        var w3 = W[j + 1];
                                        var v1v2w2 = isLeft(v1, v2, w2);
                                        var v2w1w2 = isLeft(v2, w1, w2);
                                        var v2w2w3 = isLeft(v2, w2, w3);
                                        var w1w2v2 = isLeft(w1, w2, v2);
                                        var w2v1v2 = isLeft(w2, v1, v2);
                                        var w2v2v3 = isLeft(w2, v2, v3);
                                        if (v1v2w2 >= 0 && v2w1w2 >= 0 && v2w2w3 < 0 &&
                                            w1w2v2 >= 0 && w2v1v2 >= 0 && w2v2v3 < 0) {
                                            bt.ll = new BiTangent(i, j);
                                        } else if (v1v2w2 <= 0 && v2w1w2 <= 0 && v2w2w3 > 0 &&
                                            w1w2v2 <= 0 && w2v1v2 <= 0 && w2v2v3 > 0) {
                                            bt.rr = new BiTangent(i, j);
                                        } else if (v1v2w2 <= 0 && v2w1w2 > 0 && v2w2w3 <= 0 &&
                                            w1w2v2 >= 0 && w2v1v2 < 0 && w2v2v3 >= 0) {
                                            bt.rl = new BiTangent(i, j);
                                        } else if (v1v2w2 >= 0 && v2w1w2 < 0 && v2w2w3 >= 0 &&
                                            w1w2v2 <= 0 && w2v1v2 > 0 && w2v2v3 <= 0) {
                                            bt.lr = new BiTangent(i, j);
                                        }
                                    }
                                }
                                return bt;
                            }
                            exports.tangents = tangents;

                            function isPointInsidePoly(p, poly) {
                                for (var i = 1, n = poly.length; i < n; ++i)
                                    if (below(poly[i - 1], poly[i], p))
                                        return false;
                                return true;
                            }

                            function isAnyPInQ(p, q) {
                                return !p.every(function(v) { return !isPointInsidePoly(v, q); });
                            }

                            function polysOverlap(p, q) {
                                if (isAnyPInQ(p, q))
                                    return true;
                                if (isAnyPInQ(q, p))
                                    return true;
                                for (var i = 1, n = p.length; i < n; ++i) {
                                    var v = p[i],
                                        u = p[i - 1];
                                    if (intersects(new LineSegment(u.x, u.y, v.x, v.y), q).length > 0)
                                        return true;
                                }
                                return false;
                            }
                            exports.polysOverlap = polysOverlap;

                        }, { "./rectangle": 16 }],
                        8: [function(require, module, exports) {
                            "use strict";
                            var rectangle_1 = require("./rectangle");
                            var vpsc_1 = require("./vpsc");
                            var shortestpaths_1 = require("./shortestpaths");
                            var NodeWrapper = (function() {
                                function NodeWrapper(id, rect, children) {
                                    this.id = id;
                                    this.rect = rect;
                                    this.children = children;
                                    this.leaf = typeof children === 'undefined' || children.length === 0;
                                }
                                return NodeWrapper;
                            }());
                            exports.NodeWrapper = NodeWrapper;
                            var Vert = (function() {
                                function Vert(id, x, y, node, line) {
                                    if (node === void 0) { node = null; }
                                    if (line === void 0) { line = null; }
                                    this.id = id;
                                    this.x = x;
                                    this.y = y;
                                    this.node = node;
                                    this.line = line;
                                }
                                return Vert;
                            }());
                            exports.Vert = Vert;
                            var LongestCommonSubsequence = (function() {
                                function LongestCommonSubsequence(s, t) {
                                    this.s = s;
                                    this.t = t;
                                    var mf = LongestCommonSubsequence.findMatch(s, t);
                                    var tr = t.slice(0).reverse();
                                    var mr = LongestCommonSubsequence.findMatch(s, tr);
                                    if (mf.length >= mr.length) {
                                        this.length = mf.length;
                                        this.si = mf.si;
                                        this.ti = mf.ti;
                                        this.reversed = false;
                                    } else {
                                        this.length = mr.length;
                                        this.si = mr.si;
                                        this.ti = t.length - mr.ti - mr.length;
                                        this.reversed = true;
                                    }
                                }
                                LongestCommonSubsequence.findMatch = function(s, t) {
                                    var m = s.length;
                                    var n = t.length;
                                    var match = { length: 0, si: -1, ti: -1 };
                                    var l = new Array(m);
                                    for (var i = 0; i < m; i++) {
                                        l[i] = new Array(n);
                                        for (var j = 0; j < n; j++)
                                            if (s[i] === t[j]) {
                                                var v = l[i][j] = (i === 0 || j === 0) ? 1 : l[i - 1][j - 1] + 1;
                                                if (v > match.length) {
                                                    match.length = v;
                                                    match.si = i - v + 1;
                                                    match.ti = j - v + 1;
                                                };
                                            } else
                                                l[i][j] = 0;
                                    }
                                    return match;
                                };
                                LongestCommonSubsequence.prototype.getSequence = function() {
                                    return this.length >= 0 ? this.s.slice(this.si, this.si + this.length) : [];
                                };
                                return LongestCommonSubsequence;
                            }());
                            exports.LongestCommonSubsequence = LongestCommonSubsequence;
                            var GridRouter = (function() {
                                function GridRouter(originalnodes, accessor, groupPadding) {
                                    if (groupPadding === void 0) { groupPadding = 12; }
                                    var _this = this;
                                    this.originalnodes = originalnodes;
                                    this.groupPadding = groupPadding;
                                    this.leaves = null;
                                    this.nodes = originalnodes.map(function(v, i) { return new NodeWrapper(i, accessor.getBounds(v), accessor.getChildren(v)); });
                                    this.leaves = this.nodes.filter(function(v) { return v.leaf; });
                                    this.groups = this.nodes.filter(function(g) { return !g.leaf; });
                                    this.cols = this.getGridLines('x');
                                    this.rows = this.getGridLines('y');
                                    this.groups.forEach(function(v) {
                                        return v.children.forEach(function(c) { return _this.nodes[c].parent = v; });
                                    });
                                    this.root = { children: [] };
                                    this.nodes.forEach(function(v) {
                                        if (typeof v.parent === 'undefined') {
                                            v.parent = _this.root;
                                            _this.root.children.push(v.id);
                                        }
                                        v.ports = [];
                                    });
                                    this.backToFront = this.nodes.slice(0);
                                    this.backToFront.sort(function(x, y) { return _this.getDepth(x) - _this.getDepth(y); });
                                    var frontToBackGroups = this.backToFront.slice(0).reverse().filter(function(g) { return !g.leaf; });
                                    frontToBackGroups.forEach(function(v) {
                                        var r = rectangle_1.Rectangle.empty();
                                        v.children.forEach(function(c) { return r = r.union(_this.nodes[c].rect); });
                                        v.rect = r.inflate(_this.groupPadding);
                                    });
                                    var colMids = this.midPoints(this.cols.map(function(r) { return r.pos; }));
                                    var rowMids = this.midPoints(this.rows.map(function(r) { return r.pos; }));
                                    var rowx = colMids[0],
                                        rowX = colMids[colMids.length - 1];
                                    var coly = rowMids[0],
                                        colY = rowMids[rowMids.length - 1];
                                    var hlines = this.rows.map(function(r) { return ({ x1: rowx, x2: rowX, y1: r.pos, y2: r.pos }); })
                                        .concat(rowMids.map(function(m) { return ({ x1: rowx, x2: rowX, y1: m, y2: m }); }));
                                    var vlines = this.cols.map(function(c) { return ({ x1: c.pos, x2: c.pos, y1: coly, y2: colY }); })
                                        .concat(colMids.map(function(m) { return ({ x1: m, x2: m, y1: coly, y2: colY }); }));
                                    var lines = hlines.concat(vlines);
                                    lines.forEach(function(l) { return l.verts = []; });
                                    this.verts = [];
                                    this.edges = [];
                                    hlines.forEach(function(h) {
                                        return vlines.forEach(function(v) {
                                            var p = new Vert(_this.verts.length, v.x1, h.y1);
                                            h.verts.push(p);
                                            v.verts.push(p);
                                            _this.verts.push(p);
                                            var i = _this.backToFront.length;
                                            while (i-- > 0) {
                                                var node = _this.backToFront[i],
                                                    r = node.rect;
                                                var dx = Math.abs(p.x - r.cx()),
                                                    dy = Math.abs(p.y - r.cy());
                                                if (dx < r.width() / 2 && dy < r.height() / 2) {
                                                    p.node = node;
                                                    break;
                                                }
                                            }
                                        });
                                    });
                                    lines.forEach(function(l, li) {
                                        _this.nodes.forEach(function(v, i) {
                                            v.rect.lineIntersections(l.x1, l.y1, l.x2, l.y2).forEach(function(intersect, j) {
                                                var p = new Vert(_this.verts.length, intersect.x, intersect.y, v, l);
                                                _this.verts.push(p);
                                                l.verts.push(p);
                                                v.ports.push(p);
                                            });
                                        });
                                        var isHoriz = Math.abs(l.y1 - l.y2) < 0.1;
                                        var delta = function(a, b) { return isHoriz ? b.x - a.x : b.y - a.y; };
                                        l.verts.sort(delta);
                                        for (var i = 1; i < l.verts.length; i++) {
                                            var u = l.verts[i - 1],
                                                v = l.verts[i];
                                            if (u.node && u.node === v.node && u.node.leaf)
                                                continue;
                                            _this.edges.push({ source: u.id, target: v.id, length: Math.abs(delta(u, v)) });
                                        }
                                    });
                                }
                                GridRouter.prototype.avg = function(a) { return a.reduce(function(x, y) { return x + y; }) / a.length; };
                                GridRouter.prototype.getGridLines = function(axis) {
                                    var columns = [];
                                    var ls = this.leaves.slice(0, this.leaves.length);
                                    while (ls.length > 0) {
                                        var overlapping = ls.filter(function(v) { return v.rect['overlap' + axis.toUpperCase()](ls[0].rect); });
                                        var col = {
                                            nodes: overlapping,
                                            pos: this.avg(overlapping.map(function(v) { return v.rect['c' + axis](); }))
                                        };
                                        columns.push(col);
                                        col.nodes.forEach(function(v) { return ls.splice(ls.indexOf(v), 1); });
                                    }
                                    columns.sort(function(a, b) { return a.pos - b.pos; });
                                    return columns;
                                };
                                GridRouter.prototype.getDepth = function(v) {
                                    var depth = 0;
                                    while (v.parent !== this.root) {
                                        depth++;
                                        v = v.parent;
                                    }
                                    return depth;
                                };
                                GridRouter.prototype.midPoints = function(a) {
                                    var gap = a[1] - a[0];
                                    var mids = [a[0] - gap / 2];
                                    for (var i = 1; i < a.length; i++) {
                                        mids.push((a[i] + a[i - 1]) / 2);
                                    }
                                    mids.push(a[a.length - 1] + gap / 2);
                                    return mids;
                                };
                                GridRouter.prototype.findLineage = function(v) {
                                    var lineage = [v];
                                    do {
                                        v = v.parent;
                                        lineage.push(v);
                                    } while (v !== this.root);
                                    return lineage.reverse();
                                };
                                GridRouter.prototype.findAncestorPathBetween = function(a, b) {
                                    var aa = this.findLineage(a),
                                        ba = this.findLineage(b),
                                        i = 0;
                                    while (aa[i] === ba[i])
                                        i++;
                                    return { commonAncestor: aa[i - 1], lineages: aa.slice(i).concat(ba.slice(i)) };
                                };
                                GridRouter.prototype.siblingObstacles = function(a, b) {
                                    var _this = this;
                                    var path = this.findAncestorPathBetween(a, b);
                                    var lineageLookup = {};
                                    path.lineages.forEach(function(v) { return lineageLookup[v.id] = {}; });
                                    var obstacles = path.commonAncestor.children.filter(function(v) { return !(v in lineageLookup); });
                                    path.lineages
                                        .filter(function(v) { return v.parent !== path.commonAncestor; })
                                        .forEach(function(v) { return obstacles = obstacles.concat(v.parent.children.filter(function(c) { return c !== v.id; })); });
                                    return obstacles.map(function(v) { return _this.nodes[v]; });
                                };
                                GridRouter.getSegmentSets = function(routes, x, y) {
                                    var vsegments = [];
                                    for (var ei = 0; ei < routes.length; ei++) {
                                        var route = routes[ei];
                                        for (var si = 0; si < route.length; si++) {
                                            var s = route[si];
                                            s.edgeid = ei;
                                            s.i = si;
                                            var sdx = s[1][x] - s[0][x];
                                            if (Math.abs(sdx) < 0.1) {
                                                vsegments.push(s);
                                            }
                                        }
                                    }
                                    vsegments.sort(function(a, b) { return a[0][x] - b[0][x]; });
                                    var vsegmentsets = [];
                                    var segmentset = null;
                                    for (var i = 0; i < vsegments.length; i++) {
                                        var s = vsegments[i];
                                        if (!segmentset || Math.abs(s[0][x] - segmentset.pos) > 0.1) {
                                            segmentset = { pos: s[0][x], segments: [] };
                                            vsegmentsets.push(segmentset);
                                        }
                                        segmentset.segments.push(s);
                                    }
                                    return vsegmentsets;
                                };
                                GridRouter.nudgeSegs = function(x, y, routes, segments, leftOf, gap) {
                                    var n = segments.length;
                                    if (n <= 1)
                                        return;
                                    var vs = segments.map(function(s) { return new vpsc_1.Variable(s[0][x]); });
                                    var cs = [];
                                    for (var i = 0; i < n; i++) {
                                        for (var j = 0; j < n; j++) {
                                            if (i === j)
                                                continue;
                                            var s1 = segments[i],
                                                s2 = segments[j],
                                                e1 = s1.edgeid,
                                                e2 = s2.edgeid,
                                                lind = -1,
                                                rind = -1;
                                            if (x == 'x') {
                                                if (leftOf(e1, e2)) {
                                                    if (s1[0][y] < s1[1][y]) {
                                                        lind = j, rind = i;
                                                    } else {
                                                        lind = i, rind = j;
                                                    }
                                                }
                                            } else {
                                                if (leftOf(e1, e2)) {
                                                    if (s1[0][y] < s1[1][y]) {
                                                        lind = i, rind = j;
                                                    } else {
                                                        lind = j, rind = i;
                                                    }
                                                }
                                            }
                                            if (lind >= 0) {
                                                cs.push(new vpsc_1.Constraint(vs[lind], vs[rind], gap));
                                            }
                                        }
                                    }
                                    var solver = new vpsc_1.Solver(vs, cs);
                                    solver.solve();
                                    vs.forEach(function(v, i) {
                                        var s = segments[i];
                                        var pos = v.position();
                                        s[0][x] = s[1][x] = pos;
                                        var route = routes[s.edgeid];
                                        if (s.i > 0)
                                            route[s.i - 1][1][x] = pos;
                                        if (s.i < route.length - 1)
                                            route[s.i + 1][0][x] = pos;
                                    });
                                };
                                GridRouter.nudgeSegments = function(routes, x, y, leftOf, gap) {
                                    var vsegmentsets = GridRouter.getSegmentSets(routes, x, y);
                                    for (var i = 0; i < vsegmentsets.length; i++) {
                                        var ss = vsegmentsets[i];
                                        var events = [];
                                        for (var j = 0; j < ss.segments.length; j++) {
                                            var s = ss.segments[j];
                                            events.push({ type: 0, s: s, pos: Math.min(s[0][y], s[1][y]) });
                                            events.push({ type: 1, s: s, pos: Math.max(s[0][y], s[1][y]) });
                                        }
                                        events.sort(function(a, b) { return a.pos - b.pos + a.type - b.type; });
                                        var open = [];
                                        var openCount = 0;
                                        events.forEach(function(e) {
                                            if (e.type === 0) {
                                                open.push(e.s);
                                                openCount++;
                                            } else {
                                                openCount--;
                                            }
                                            if (openCount == 0) {
                                                GridRouter.nudgeSegs(x, y, routes, open, leftOf, gap);
                                                open = [];
                                            }
                                        });
                                    }
                                };
                                GridRouter.prototype.routeEdges = function(edges, nudgeGap, source, target) {
                                    var _this = this;
                                    var routePaths = edges.map(function(e) { return _this.route(source(e), target(e)); });
                                    var order = GridRouter.orderEdges(routePaths);
                                    var routes = routePaths.map(function(e) { return GridRouter.makeSegments(e); });
                                    GridRouter.nudgeSegments(routes, 'x', 'y', order, nudgeGap);
                                    GridRouter.nudgeSegments(routes, 'y', 'x', order, nudgeGap);
                                    GridRouter.unreverseEdges(routes, routePaths);
                                    return routes;
                                };
                                GridRouter.unreverseEdges = function(routes, routePaths) {
                                    routes.forEach(function(segments, i) {
                                        var path = routePaths[i];
                                        if (path.reversed) {
                                            segments.reverse();
                                            segments.forEach(function(segment) {
                                                segment.reverse();
                                            });
                                        }
                                    });
                                };
                                GridRouter.angleBetween2Lines = function(line1, line2) {
                                    var angle1 = Math.atan2(line1[0].y - line1[1].y, line1[0].x - line1[1].x);
                                    var angle2 = Math.atan2(line2[0].y - line2[1].y, line2[0].x - line2[1].x);
                                    var diff = angle1 - angle2;
                                    if (diff > Math.PI || diff < -Math.PI) {
                                        diff = angle2 - angle1;
                                    }
                                    return diff;
                                };
                                GridRouter.isLeft = function(a, b, c) {
                                    return ((b.x - a.x) * (c.y - a.y) - (b.y - a.y) * (c.x - a.x)) <= 0;
                                };
                                GridRouter.getOrder = function(pairs) {
                                    var outgoing = {};
                                    for (var i = 0; i < pairs.length; i++) {
                                        var p = pairs[i];
                                        if (typeof outgoing[p.l] === 'undefined')
                                            outgoing[p.l] = {};
                                        outgoing[p.l][p.r] = true;
                                    }
                                    return function(l, r) { return typeof outgoing[l] !== 'undefined' && outgoing[l][r]; };
                                };
                                GridRouter.orderEdges = function(edges) {
                                    var edgeOrder = [];
                                    for (var i = 0; i < edges.length - 1; i++) {
                                        for (var j = i + 1; j < edges.length; j++) {
                                            var e = edges[i],
                                                f = edges[j],
                                                lcs = new LongestCommonSubsequence(e, f);
                                            var u, vi, vj;
                                            if (lcs.length === 0)
                                                continue;
                                            if (lcs.reversed) {
                                                f.reverse();
                                                f.reversed = true;
                                                lcs = new LongestCommonSubsequence(e, f);
                                            }
                                            if ((lcs.si <= 0 || lcs.ti <= 0) &&
                                                (lcs.si + lcs.length >= e.length || lcs.ti + lcs.length >= f.length)) {
                                                edgeOrder.push({ l: i, r: j });
                                                continue;
                                            }
                                            if (lcs.si + lcs.length >= e.length || lcs.ti + lcs.length >= f.length) {
                                                u = e[lcs.si + 1];
                                                vj = e[lcs.si - 1];
                                                vi = f[lcs.ti - 1];
                                            } else {
                                                u = e[lcs.si + lcs.length - 2];
                                                vi = e[lcs.si + lcs.length];
                                                vj = f[lcs.ti + lcs.length];
                                            }
                                            if (GridRouter.isLeft(u, vi, vj)) {
                                                edgeOrder.push({ l: j, r: i });
                                            } else {
                                                edgeOrder.push({ l: i, r: j });
                                            }
                                        }
                                    }
                                    return GridRouter.getOrder(edgeOrder);
                                };
                                GridRouter.makeSegments = function(path) {
                                    function copyPoint(p) {
                                        return { x: p.x, y: p.y };
                                    }
                                    var isStraight = function(a, b, c) { return Math.abs((b.x - a.x) * (c.y - a.y) - (b.y - a.y) * (c.x - a.x)) < 0.001; };
                                    var segments = [];
                                    var a = copyPoint(path[0]);
                                    for (var i = 1; i < path.length; i++) {
                                        var b = copyPoint(path[i]),
                                            c = i < path.length - 1 ? path[i + 1] : null;
                                        if (!c || !isStraight(a, b, c)) {
                                            segments.push([a, b]);
                                            a = b;
                                        }
                                    }
                                    return segments;
                                };
                                GridRouter.prototype.route = function(s, t) {
                                    var _this = this;
                                    var source = this.nodes[s],
                                        target = this.nodes[t];
                                    this.obstacles = this.siblingObstacles(source, target);
                                    var obstacleLookup = {};
                                    this.obstacles.forEach(function(o) { return obstacleLookup[o.id] = o; });
                                    this.passableEdges = this.edges.filter(function(e) {
                                        var u = _this.verts[e.source],
                                            v = _this.verts[e.target];
                                        return !(u.node && u.node.id in obstacleLookup ||
                                            v.node && v.node.id in obstacleLookup);
                                    });
                                    for (var i = 1; i < source.ports.length; i++) {
                                        var u = source.ports[0].id;
                                        var v = source.ports[i].id;
                                        this.passableEdges.push({
                                            source: u,
                                            target: v,
                                            length: 0
                                        });
                                    }
                                    for (var i = 1; i < target.ports.length; i++) {
                                        var u = target.ports[0].id;
                                        var v = target.ports[i].id;
                                        this.passableEdges.push({
                                            source: u,
                                            target: v,
                                            length: 0
                                        });
                                    }
                                    var getSource = function(e) { return e.source; },
                                        getTarget = function(e) { return e.target; },
                                        getLength = function(e) { return e.length; };
                                    var shortestPathCalculator = new shortestpaths_1.Calculator(this.verts.length, this.passableEdges, getSource, getTarget, getLength);
                                    var bendPenalty = function(u, v, w) {
                                        var a = _this.verts[u],
                                            b = _this.verts[v],
                                            c = _this.verts[w];
                                        var dx = Math.abs(c.x - a.x),
                                            dy = Math.abs(c.y - a.y);
                                        if (a.node === source && a.node === b.node || b.node === target && b.node === c.node)
                                            return 0;
                                        return dx > 1 && dy > 1 ? 1000 : 0;
                                    };
                                    var shortestPath = shortestPathCalculator.PathFromNodeToNodeWithPrevCost(source.ports[0].id, target.ports[0].id, bendPenalty);
                                    var pathPoints = shortestPath.reverse().map(function(vi) { return _this.verts[vi]; });
                                    pathPoints.push(this.nodes[target.id].ports[0]);
                                    return pathPoints.filter(function(v, i) {
                                        return !(i < pathPoints.length - 1 && pathPoints[i + 1].node === source && v.node === source ||
                                            i > 0 && v.node === target && pathPoints[i - 1].node === target);
                                    });
                                };
                                GridRouter.getRoutePath = function(route, cornerradius, arrowwidth, arrowheight) {
                                    var result = {
                                        routepath: 'M ' + route[0][0].x + ' ' + route[0][0].y + ' ',
                                        arrowpath: ''
                                    };
                                    if (route.length > 1) {
                                        for (var i = 0; i < route.length; i++) {
                                            var li = route[i];
                                            var x = li[1].x,
                                                y = li[1].y;
                                            var dx = x - li[0].x;
                                            var dy = y - li[0].y;
                                            if (i < route.length - 1) {
                                                if (Math.abs(dx) > 0) {
                                                    x -= dx / Math.abs(dx) * cornerradius;
                                                } else {
                                                    y -= dy / Math.abs(dy) * cornerradius;
                                                }
                                                result.routepath += 'L ' + x + ' ' + y + ' ';
                                                var l = route[i + 1];
                                                var x0 = l[0].x,
                                                    y0 = l[0].y;
                                                var x1 = l[1].x;
                                                var y1 = l[1].y;
                                                dx = x1 - x0;
                                                dy = y1 - y0;
                                                var angle = GridRouter.angleBetween2Lines(li, l) < 0 ? 1 : 0;
                                                var x2, y2;
                                                if (Math.abs(dx) > 0) {
                                                    x2 = x0 + dx / Math.abs(dx) * cornerradius;
                                                    y2 = y0;
                                                } else {
                                                    x2 = x0;
                                                    y2 = y0 + dy / Math.abs(dy) * cornerradius;
                                                }
                                                var cx = Math.abs(x2 - x);
                                                var cy = Math.abs(y2 - y);
                                                result.routepath += 'A ' + cx + ' ' + cy + ' 0 0 ' + angle + ' ' + x2 + ' ' + y2 + ' ';
                                            } else {
                                                var arrowtip = [x, y];
                                                var arrowcorner1, arrowcorner2;
                                                if (Math.abs(dx) > 0) {
                                                    x -= dx / Math.abs(dx) * arrowheight;
                                                    arrowcorner1 = [x, y + arrowwidth];
                                                    arrowcorner2 = [x, y - arrowwidth];
                                                } else {
                                                    y -= dy / Math.abs(dy) * arrowheight;
                                                    arrowcorner1 = [x + arrowwidth, y];
                                                    arrowcorner2 = [x - arrowwidth, y];
                                                }
                                                result.routepath += 'L ' + x + ' ' + y + ' ';
                                                if (arrowheight > 0) {
                                                    result.arrowpath = 'M ' + arrowtip[0] + ' ' + arrowtip[1] + ' L ' + arrowcorner1[0] + ' ' + arrowcorner1[1] +
                                                        ' L ' + arrowcorner2[0] + ' ' + arrowcorner2[1];
                                                }
                                            }
                                        }
                                    } else {
                                        var li = route[0];
                                        var x = li[1].x,
                                            y = li[1].y;
                                        var dx = x - li[0].x;
                                        var dy = y - li[0].y;
                                        var arrowtip = [x, y];
                                        var arrowcorner1, arrowcorner2;
                                        if (Math.abs(dx) > 0) {
                                            x -= dx / Math.abs(dx) * arrowheight;
                                            arrowcorner1 = [x, y + arrowwidth];
                                            arrowcorner2 = [x, y - arrowwidth];
                                        } else {
                                            y -= dy / Math.abs(dy) * arrowheight;
                                            arrowcorner1 = [x + arrowwidth, y];
                                            arrowcorner2 = [x - arrowwidth, y];
                                        }
                                        result.routepath += 'L ' + x + ' ' + y + ' ';
                                        if (arrowheight > 0) {
                                            result.arrowpath = 'M ' + arrowtip[0] + ' ' + arrowtip[1] + ' L ' + arrowcorner1[0] + ' ' + arrowcorner1[1] +
                                                ' L ' + arrowcorner2[0] + ' ' + arrowcorner2[1];
                                        }
                                    }
                                    return result;
                                };
                                return GridRouter;
                            }());
                            exports.GridRouter = GridRouter;

                        }, { "./rectangle": 16, "./shortestpaths": 17, "./vpsc": 18 }],
                        9: [function(require, module, exports) {
                            "use strict";
                            var packingOptions = {
                                PADDING: 10,
                                GOLDEN_SECTION: (1 + Math.sqrt(5)) / 2,
                                FLOAT_EPSILON: 0.0001,
                                MAX_INERATIONS: 100
                            };

                            function applyPacking(graphs, w, h, node_size, desired_ratio) {
                                if (desired_ratio === void 0) { desired_ratio = 1; }
                                var init_x = 0,
                                    init_y = 0,
                                    svg_width = w,
                                    svg_height = h,
                                    desired_ratio = typeof desired_ratio !== 'undefined' ? desired_ratio : 1,
                                    node_size = typeof node_size !== 'undefined' ? node_size : 0,
                                    real_width = 0,
                                    real_height = 0,
                                    min_width = 0,
                                    global_bottom = 0,
                                    line = [];
                                if (graphs.length == 0)
                                    return;
                                calculate_bb(graphs);
                                apply(graphs, desired_ratio);
                                put_nodes_to_right_positions(graphs);

                                function calculate_bb(graphs) {
                                    graphs.forEach(function(g) {
                                        calculate_single_bb(g);
                                    });

                                    function calculate_single_bb(graph) {
                                        var min_x = Number.MAX_VALUE,
                                            min_y = Number.MAX_VALUE,
                                            max_x = 0,
                                            max_y = 0;
                                        graph.array.forEach(function(v) {
                                            var w = typeof v.width !== 'undefined' ? v.width : node_size;
                                            var h = typeof v.height !== 'undefined' ? v.height : node_size;
                                            w /= 2;
                                            h /= 2;
                                            max_x = Math.max(v.x + w, max_x);
                                            min_x = Math.min(v.x - w, min_x);
                                            max_y = Math.max(v.y + h, max_y);
                                            min_y = Math.min(v.y - h, min_y);
                                        });
                                        graph.width = max_x - min_x;
                                        graph.height = max_y - min_y;
                                    }
                                }

                                function put_nodes_to_right_positions(graphs) {
                                    graphs.forEach(function(g) {
                                        var center = { x: 0, y: 0 };
                                        g.array.forEach(function(node) {
                                            center.x += node.x;
                                            center.y += node.y;
                                        });
                                        center.x /= g.array.length;
                                        center.y /= g.array.length;
                                        var corner = { x: center.x - g.width / 2, y: center.y - g.height / 2 };
                                        var offset = { x: g.x - corner.x + svg_width / 2 - real_width / 2, y: g.y - corner.y + svg_height / 2 - real_height / 2 };
                                        g.array.forEach(function(node) {
                                            node.x += offset.x;
                                            node.y += offset.y;
                                        });
                                    });
                                }

                                function apply(data, desired_ratio) {
                                    var curr_best_f = Number.POSITIVE_INFINITY;
                                    var curr_best = 0;
                                    data.sort(function(a, b) { return b.height - a.height; });
                                    min_width = data.reduce(function(a, b) {
                                        return a.width < b.width ? a.width : b.width;
                                    });
                                    var left = x1 = min_width;
                                    var right = x2 = get_entire_width(data);
                                    var iterationCounter = 0;
                                    var f_x1 = Number.MAX_VALUE;
                                    var f_x2 = Number.MAX_VALUE;
                                    var flag = -1;
                                    var dx = Number.MAX_VALUE;
                                    var df = Number.MAX_VALUE;
                                    while ((dx > min_width) || df > packingOptions.FLOAT_EPSILON) {
                                        if (flag != 1) {
                                            var x1 = right - (right - left) / packingOptions.GOLDEN_SECTION;
                                            var f_x1 = step(data, x1);
                                        }
                                        if (flag != 0) {
                                            var x2 = left + (right - left) / packingOptions.GOLDEN_SECTION;
                                            var f_x2 = step(data, x2);
                                        }
                                        dx = Math.abs(x1 - x2);
                                        df = Math.abs(f_x1 - f_x2);
                                        if (f_x1 < curr_best_f) {
                                            curr_best_f = f_x1;
                                            curr_best = x1;
                                        }
                                        if (f_x2 < curr_best_f) {
                                            curr_best_f = f_x2;
                                            curr_best = x2;
                                        }
                                        if (f_x1 > f_x2) {
                                            left = x1;
                                            x1 = x2;
                                            f_x1 = f_x2;
                                            flag = 1;
                                        } else {
                                            right = x2;
                                            x2 = x1;
                                            f_x2 = f_x1;
                                            flag = 0;
                                        }
                                        if (iterationCounter++ > 100) {
                                            break;
                                        }
                                    }
                                    step(data, curr_best);
                                }

                                function step(data, max_width) {
                                    line = [];
                                    real_width = 0;
                                    real_height = 0;
                                    global_bottom = init_y;
                                    for (var i = 0; i < data.length; i++) {
                                        var o = data[i];
                                        put_rect(o, max_width);
                                    }
                                    return Math.abs(get_real_ratio() - desired_ratio);
                                }

                                function put_rect(rect, max_width) {
                                    var parent = undefined;
                                    for (var i = 0; i < line.length; i++) {
                                        if ((line[i].space_left >= rect.height) && (line[i].x + line[i].width + rect.width + packingOptions.PADDING - max_width) <= packingOptions.FLOAT_EPSILON) {
                                            parent = line[i];
                                            break;
                                        }
                                    }
                                    line.push(rect);
                                    if (parent !== undefined) {
                                        rect.x = parent.x + parent.width + packingOptions.PADDING;
                                        rect.y = parent.bottom;
                                        rect.space_left = rect.height;
                                        rect.bottom = rect.y;
                                        parent.space_left -= rect.height + packingOptions.PADDING;
                                        parent.bottom += rect.height + packingOptions.PADDING;
                                    } else {
                                        rect.y = global_bottom;
                                        global_bottom += rect.height + packingOptions.PADDING;
                                        rect.x = init_x;
                                        rect.bottom = rect.y;
                                        rect.space_left = rect.height;
                                    }
                                    if (rect.y + rect.height - real_height > -packingOptions.FLOAT_EPSILON)
                                        real_height = rect.y + rect.height - init_y;
                                    if (rect.x + rect.width - real_width > -packingOptions.FLOAT_EPSILON)
                                        real_width = rect.x + rect.width - init_x;
                                };

                                function get_entire_width(data) {
                                    var width = 0;
                                    data.forEach(function(d) { return width += d.width + packingOptions.PADDING; });
                                    return width;
                                }

                                function get_real_ratio() {
                                    return (real_width / real_height);
                                }
                            }
                            exports.applyPacking = applyPacking;

                            function separateGraphs(nodes, links) {
                                var marks = {};
                                var ways = {};
                                var graphs = [];
                                var clusters = 0;
                                for (var i = 0; i < links.length; i++) {
                                    var link = links[i];
                                    var n1 = link.source;
                                    var n2 = link.target;
                                    if (ways[n1.index])
                                        ways[n1.index].push(n2);
                                    else
                                        ways[n1.index] = [n2];
                                    if (ways[n2.index])
                                        ways[n2.index].push(n1);
                                    else
                                        ways[n2.index] = [n1];
                                }
                                for (var i = 0; i < nodes.length; i++) {
                                    var node = nodes[i];
                                    if (marks[node.index])
                                        continue;
                                    explore_node(node, true);
                                }

                                function explore_node(n, is_new) {
                                    if (marks[n.index] !== undefined)
                                        return;
                                    if (is_new) {
                                        clusters++;
                                        graphs.push({ array: [] });
                                    }
                                    marks[n.index] = clusters;
                                    graphs[clusters - 1].array.push(n);
                                    var adjacent = ways[n.index];
                                    if (!adjacent)
                                        return;
                                    for (var j = 0; j < adjacent.length; j++) {
                                        explore_node(adjacent[j], false);
                                    }
                                }
                                return graphs;
                            }
                            exports.separateGraphs = separateGraphs;

                        }, {}],
                        10: [function(require, module, exports) {
                            "use strict";
                            var powergraph = require("./powergraph");
                            var linklengths_1 = require("./linklengths");
                            var descent_1 = require("./descent");
                            var rectangle_1 = require("./rectangle");
                            var shortestpaths_1 = require("./shortestpaths");
                            var geom_1 = require("./geom");
                            var handledisconnected_1 = require("./handledisconnected");
                            var EventType;
                            (function(EventType) {
                                EventType[EventType["start"] = 0] = "start";
                                EventType[EventType["tick"] = 1] = "tick";
                                EventType[EventType["end"] = 2] = "end";
                            })(EventType = exports.EventType || (exports.EventType = {}));;

                            function isGroup(g) {
                                return typeof g.leaves !== 'undefined' || typeof g.groups !== 'undefined';
                            }
                            var Layout = (function() {
                                function Layout() {
                                    var _this = this;
                                    this._canvasSize = [1, 1];
                                    this._linkDistance = 20;
                                    this._defaultNodeSize = 10;
                                    this._linkLengthCalculator = null;
                                    this._linkType = null;
                                    this._avoidOverlaps = false;
                                    this._handleDisconnected = true;
                                    this._running = false;
                                    this._nodes = [];
                                    this._groups = [];
                                    this._rootGroup = null;
                                    this._links = [];
                                    this._constraints = [];
                                    this._distanceMatrix = null;
                                    this._descent = null;
                                    this._directedLinkConstraints = null;
                                    this._threshold = 0.01;
                                    this._visibilityGraph = null;
                                    this._groupCompactness = 1e-6;
                                    this.event = null;
                                    this.linkAccessor = {
                                        getSourceIndex: Layout.getSourceIndex,
                                        getTargetIndex: Layout.getTargetIndex,
                                        setLength: Layout.setLinkLength,
                                        getType: function(l) { return typeof _this._linkType === "function" ? _this._linkType(l) : 0; }
                                    };
                                }
                                Layout.prototype.on = function(e, listener) {
                                    if (!this.event)
                                        this.event = {};
                                    if (typeof e === 'string') {
                                        this.event[EventType[e]] = listener;
                                    } else {
                                        this.event[e] = listener;
                                    }
                                    return this;
                                };
                                Layout.prototype.trigger = function(e) {
                                    if (this.event && typeof this.event[e.type] !== 'undefined') {
                                        this.event[e.type](e);
                                    }
                                };
                                Layout.prototype.kick = function() {
                                    while (!this.tick())
                                    ;
                                };
                                Layout.prototype.tick = function() {
                                    if (this._alpha < this._threshold) {
                                        this._running = false;
                                        this.trigger({ type: EventType.end, alpha: this._alpha = 0, stress: this._lastStress });
                                        return true;
                                    }
                                    var n = this._nodes.length,
                                        m = this._links.length;
                                    var o, i;
                                    this._descent.locks.clear();
                                    for (i = 0; i < n; ++i) {
                                        o = this._nodes[i];
                                        if (o.fixed) {
                                            if (typeof o.px === 'undefined' || typeof o.py === 'undefined') {
                                                o.px = o.x;
                                                o.py = o.y;
                                            }
                                            var p = [o.px, o.py];
                                            this._descent.locks.add(i, p);
                                        }
                                    }
                                    var s1 = this._descent.rungeKutta();
                                    if (s1 === 0) {
                                        this._alpha = 0;
                                    } else if (typeof this._lastStress !== 'undefined') {
                                        this._alpha = s1;
                                    }
                                    this._lastStress = s1;
                                    this.updateNodePositions();
                                    this.trigger({ type: EventType.tick, alpha: this._alpha, stress: this._lastStress });
                                    return false;
                                };
                                Layout.prototype.updateNodePositions = function() {
                                    var x = this._descent.x[0],
                                        y = this._descent.x[1];
                                    var o, i = this._nodes.length;
                                    while (i--) {
                                        o = this._nodes[i];
                                        o.x = x[i];
                                        o.y = y[i];
                                    }
                                };
                                Layout.prototype.nodes = function(v) {
                                    if (!v) {
                                        if (this._nodes.length === 0 && this._links.length > 0) {
                                            var n = 0;
                                            this._links.forEach(function(l) {
                                                n = Math.max(n, l.source, l.target);
                                            });
                                            this._nodes = new Array(++n);
                                            for (var i = 0; i < n; ++i) {
                                                this._nodes[i] = {};
                                            }
                                        }
                                        return this._nodes;
                                    }
                                    this._nodes = v;
                                    return this;
                                };
                                Layout.prototype.groups = function(x) {
                                    var _this = this;
                                    if (!x)
                                        return this._groups;
                                    this._groups = x;
                                    this._rootGroup = {};
                                    this._groups.forEach(function(g) {
                                        if (typeof g.padding === "undefined")
                                            g.padding = 1;
                                        if (typeof g.leaves !== "undefined") {
                                            g.leaves.forEach(function(v, i) {
                                                if (typeof v === 'number')
                                                    (g.leaves[i] = _this._nodes[v]).parent = g;
                                            });
                                        }
                                        if (typeof g.groups !== "undefined") {
                                            g.groups.forEach(function(gi, i) {
                                                if (typeof gi === 'number')
                                                    (g.groups[i] = _this._groups[gi]).parent = g;
                                            });
                                        }
                                    });
                                    this._rootGroup.leaves = this._nodes.filter(function(v) { return typeof v.parent === 'undefined'; });
                                    this._rootGroup.groups = this._groups.filter(function(g) { return typeof g.parent === 'undefined'; });
                                    return this;
                                };
                                Layout.prototype.powerGraphGroups = function(f) {
                                    var g = powergraph.getGroups(this._nodes, this._links, this.linkAccessor, this._rootGroup);
                                    this.groups(g.groups);
                                    f(g);
                                    return this;
                                };
                                Layout.prototype.avoidOverlaps = function(v) {
                                    if (!arguments.length)
                                        return this._avoidOverlaps;
                                    this._avoidOverlaps = v;
                                    return this;
                                };
                                Layout.prototype.handleDisconnected = function(v) {
                                    if (!arguments.length)
                                        return this._handleDisconnected;
                                    this._handleDisconnected = v;
                                    return this;
                                };
                                Layout.prototype.flowLayout = function(axis, minSeparation) {
                                    if (!arguments.length)
                                        axis = 'y';
                                    this._directedLinkConstraints = {
                                        axis: axis,
                                        getMinSeparation: typeof minSeparation === 'number' ? function() { return minSeparation; } : minSeparation
                                    };
                                    return this;
                                };
                                Layout.prototype.links = function(x) {
                                    if (!arguments.length)
                                        return this._links;
                                    this._links = x;
                                    return this;
                                };
                                Layout.prototype.constraints = function(c) {
                                    if (!arguments.length)
                                        return this._constraints;
                                    this._constraints = c;
                                    return this;
                                };
                                Layout.prototype.distanceMatrix = function(d) {
                                    if (!arguments.length)
                                        return this._distanceMatrix;
                                    this._distanceMatrix = d;
                                    return this;
                                };
                                Layout.prototype.size = function(x) {
                                    if (!x)
                                        return this._canvasSize;
                                    this._canvasSize = x;
                                    return this;
                                };
                                Layout.prototype.defaultNodeSize = function(x) {
                                    if (!x)
                                        return this._defaultNodeSize;
                                    this._defaultNodeSize = x;
                                    return this;
                                };
                                Layout.prototype.groupCompactness = function(x) {
                                    if (!x)
                                        return this._groupCompactness;
                                    this._groupCompactness = x;
                                    return this;
                                };
                                Layout.prototype.linkDistance = function(x) {
                                    if (!x) {
                                        return this._linkDistance;
                                    }
                                    this._linkDistance = typeof x === "function" ? x : +x;
                                    this._linkLengthCalculator = null;
                                    return this;
                                };
                                Layout.prototype.linkType = function(f) {
                                    this._linkType = f;
                                    return this;
                                };
                                Layout.prototype.convergenceThreshold = function(x) {
                                    if (!x)
                                        return this._threshold;
                                    this._threshold = typeof x === "function" ? x : +x;
                                    return this;
                                };
                                Layout.prototype.alpha = function(x) {
                                    if (!arguments.length)
                                        return this._alpha;
                                    else {
                                        x = +x;
                                        if (this._alpha) {
                                            if (x > 0)
                                                this._alpha = x;
                                            else
                                                this._alpha = 0;
                                        } else if (x > 0) {
                                            if (!this._running) {
                                                this._running = true;
                                                this.trigger({ type: EventType.start, alpha: this._alpha = x });
                                                this.kick();
                                            }
                                        }
                                        return this;
                                    }
                                };
                                Layout.prototype.getLinkLength = function(link) {
                                    return typeof this._linkDistance === "function" ? +(this._linkDistance(link)) : this._linkDistance;
                                };
                                Layout.setLinkLength = function(link, length) {
                                    link.length = length;
                                };
                                Layout.prototype.getLinkType = function(link) {
                                    return typeof this._linkType === "function" ? this._linkType(link) : 0;
                                };
                                Layout.prototype.symmetricDiffLinkLengths = function(idealLength, w) {
                                    var _this = this;
                                    if (w === void 0) { w = 1; }
                                    this.linkDistance(function(l) { return idealLength * l.length; });
                                    this._linkLengthCalculator = function() { return linklengths_1.symmetricDiffLinkLengths(_this._links, _this.linkAccessor, w); };
                                    return this;
                                };
                                Layout.prototype.jaccardLinkLengths = function(idealLength, w) {
                                    var _this = this;
                                    if (w === void 0) { w = 1; }
                                    this.linkDistance(function(l) { return idealLength * l.length; });
                                    this._linkLengthCalculator = function() { return linklengths_1.jaccardLinkLengths(_this._links, _this.linkAccessor, w); };
                                    return this;
                                };
                                Layout.prototype.start = function(initialUnconstrainedIterations, initialUserConstraintIterations, initialAllConstraintsIterations, gridSnapIterations, keepRunning) {
                                    var _this = this;
                                    if (initialUnconstrainedIterations === void 0) { initialUnconstrainedIterations = 0; }
                                    if (initialUserConstraintIterations === void 0) { initialUserConstraintIterations = 0; }
                                    if (initialAllConstraintsIterations === void 0) { initialAllConstraintsIterations = 0; }
                                    if (gridSnapIterations === void 0) { gridSnapIterations = 0; }
                                    if (keepRunning === void 0) { keepRunning = true; }
                                    var i, j, n = this.nodes().length,
                                        N = n + 2 * this._groups.length,
                                        m = this._links.length,
                                        w = this._canvasSize[0],
                                        h = this._canvasSize[1];
                                    var x = new Array(N),
                                        y = new Array(N);
                                    var G = null;
                                    var ao = this._avoidOverlaps;
                                    this._nodes.forEach(function(v, i) {
                                        v.index = i;
                                        if (typeof v.x === 'undefined') {
                                            v.x = w / 2, v.y = h / 2;
                                        }
                                        x[i] = v.x, y[i] = v.y;
                                    });
                                    if (this._linkLengthCalculator)
                                        this._linkLengthCalculator();
                                    var distances;
                                    if (this._distanceMatrix) {
                                        distances = this._distanceMatrix;
                                    } else {
                                        distances = (new shortestpaths_1.Calculator(N, this._links, Layout.getSourceIndex, Layout.getTargetIndex, function(l) { return _this.getLinkLength(l); })).DistanceMatrix();
                                        G = descent_1.Descent.createSquareMatrix(N, function() { return 2; });
                                        this._links.forEach(function(l) {
                                            if (typeof l.source == "number")
                                                l.source = _this._nodes[l.source];
                                            if (typeof l.target == "number")
                                                l.target = _this._nodes[l.target];
                                        });
                                        this._links.forEach(function(e) {
                                            var u = Layout.getSourceIndex(e),
                                                v = Layout.getTargetIndex(e);
                                            G[u][v] = G[v][u] = e.weight || 1;
                                        });
                                    }
                                    var D = descent_1.Descent.createSquareMatrix(N, function(i, j) {
                                        return distances[i][j];
                                    });
                                    if (this._rootGroup && typeof this._rootGroup.groups !== 'undefined') {
                                        var i = n;
                                        var addAttraction = function(i, j, strength, idealDistance) {
                                            G[i][j] = G[j][i] = strength;
                                            D[i][j] = D[j][i] = idealDistance;
                                        };
                                        this._groups.forEach(function(g) {
                                            addAttraction(i, i + 1, _this._groupCompactness, 0.1);
                                            x[i] = 0, y[i++] = 0;
                                            x[i] = 0, y[i++] = 0;
                                        });
                                    } else
                                        this._rootGroup = { leaves: this._nodes, groups: [] };
                                    var curConstraints = this._constraints || [];
                                    if (this._directedLinkConstraints) {
                                        this.linkAccessor.getMinSeparation = this._directedLinkConstraints.getMinSeparation;
                                        curConstraints = curConstraints.concat(linklengths_1.generateDirectedEdgeConstraints(n, this._links, this._directedLinkConstraints.axis, (this.linkAccessor)));
                                    }
                                    this.avoidOverlaps(false);
                                    this._descent = new descent_1.Descent([x, y], D);
                                    this._descent.locks.clear();
                                    for (var i = 0; i < n; ++i) {
                                        var o = this._nodes[i];
                                        if (o.fixed) {
                                            o.px = o.x;
                                            o.py = o.y;
                                            var p = [o.x, o.y];
                                            this._descent.locks.add(i, p);
                                        }
                                    }
                                    this._descent.threshold = this._threshold;
                                    this.initialLayout(initialUnconstrainedIterations, x, y);
                                    if (curConstraints.length > 0)
                                        this._descent.project = new rectangle_1.Projection(this._nodes, this._groups, this._rootGroup, curConstraints).projectFunctions();
                                    this._descent.run(initialUserConstraintIterations);
                                    this.separateOverlappingComponents(w, h);
                                    this.avoidOverlaps(ao);
                                    if (ao) {
                                        this._nodes.forEach(function(v, i) { v.x = x[i], v.y = y[i]; });
                                        this._descent.project = new rectangle_1.Projection(this._nodes, this._groups, this._rootGroup, curConstraints, true).projectFunctions();
                                        this._nodes.forEach(function(v, i) { x[i] = v.x, y[i] = v.y; });
                                    }
                                    this._descent.G = G;
                                    this._descent.run(initialAllConstraintsIterations);
                                    if (gridSnapIterations) {
                                        this._descent.snapStrength = 1000;
                                        this._descent.snapGridSize = this._nodes[0].width;
                                        this._descent.numGridSnapNodes = n;
                                        this._descent.scaleSnapByMaxH = n != N;
                                        var G0 = descent_1.Descent.createSquareMatrix(N, function(i, j) {
                                            if (i >= n || j >= n)
                                                return G[i][j];
                                            return 0;
                                        });
                                        this._descent.G = G0;
                                        this._descent.run(gridSnapIterations);
                                    }
                                    this.updateNodePositions();
                                    this.separateOverlappingComponents(w, h);
                                    return keepRunning ? this.resume() : this;
                                };
                                Layout.prototype.initialLayout = function(iterations, x, y) {
                                    if (this._groups.length > 0 && iterations > 0) {
                                        var n = this._nodes.length;
                                        var edges = this._links.map(function(e) { return ({ source: e.source.index, target: e.target.index }); });
                                        var vs = this._nodes.map(function(v) { return ({ index: v.index }); });
                                        this._groups.forEach(function(g, i) {
                                            vs.push({ index: g.index = n + i });
                                        });
                                        this._groups.forEach(function(g, i) {
                                            if (typeof g.leaves !== 'undefined')
                                                g.leaves.forEach(function(v) { return edges.push({ source: g.index, target: v.index }); });
                                            if (typeof g.groups !== 'undefined')
                                                g.groups.forEach(function(gg) { return edges.push({ source: g.index, target: gg.index }); });
                                        });
                                        new Layout()
                                            .size(this.size())
                                            .nodes(vs)
                                            .links(edges)
                                            .avoidOverlaps(false)
                                            .linkDistance(this.linkDistance())
                                            .symmetricDiffLinkLengths(5)
                                            .convergenceThreshold(1e-4)
                                            .start(iterations, 0, 0, 0, false);
                                        this._nodes.forEach(function(v) {
                                            x[v.index] = vs[v.index].x;
                                            y[v.index] = vs[v.index].y;
                                        });
                                    } else {
                                        this._descent.run(iterations);
                                    }
                                };
                                Layout.prototype.separateOverlappingComponents = function(width, height) {
                                    var _this = this;
                                    if (!this._distanceMatrix && this._handleDisconnected) {
                                        var x_1 = this._descent.x[0],
                                            y_1 = this._descent.x[1];
                                        this._nodes.forEach(function(v, i) { v.x = x_1[i], v.y = y_1[i]; });
                                        var graphs = handledisconnected_1.separateGraphs(this._nodes, this._links);
                                        handledisconnected_1.applyPacking(graphs, width, height, this._defaultNodeSize);
                                        this._nodes.forEach(function(v, i) {
                                            _this._descent.x[0][i] = v.x, _this._descent.x[1][i] = v.y;
                                            if (v.bounds) {
                                                v.bounds.setXCentre(v.x);
                                                v.bounds.setYCentre(v.y);
                                            }
                                        });
                                    }
                                };
                                Layout.prototype.resume = function() {
                                    return this.alpha(0.1);
                                };
                                Layout.prototype.stop = function() {
                                    return this.alpha(0);
                                };
                                Layout.prototype.prepareEdgeRouting = function(nodeMargin) {
                                    if (nodeMargin === void 0) { nodeMargin = 0; }
                                    this._visibilityGraph = new geom_1.TangentVisibilityGraph(this._nodes.map(function(v) {
                                        return v.bounds.inflate(-nodeMargin).vertices();
                                    }));
                                };
                                Layout.prototype.routeEdge = function(edge, draw) {
                                    var lineData = [];
                                    var vg2 = new geom_1.TangentVisibilityGraph(this._visibilityGraph.P, { V: this._visibilityGraph.V, E: this._visibilityGraph.E }),
                                        port1 = { x: edge.source.x, y: edge.source.y },
                                        port2 = { x: edge.target.x, y: edge.target.y },
                                        start = vg2.addPoint(port1, edge.source.index),
                                        end = vg2.addPoint(port2, edge.target.index);
                                    vg2.addEdgeIfVisible(port1, port2, edge.source.index, edge.target.index);
                                    if (typeof draw !== 'undefined') {
                                        draw(vg2);
                                    }
                                    var sourceInd = function(e) { return e.source.id; },
                                        targetInd = function(e) { return e.target.id; },
                                        length = function(e) { return e.length(); },
                                        spCalc = new shortestpaths_1.Calculator(vg2.V.length, vg2.E, sourceInd, targetInd, length),
                                        shortestPath = spCalc.PathFromNodeToNode(start.id, end.id);
                                    if (shortestPath.length === 1 || shortestPath.length === vg2.V.length) {
                                        var route = rectangle_1.makeEdgeBetween(edge.source.innerBounds, edge.target.innerBounds, 5);
                                        lineData = [route.sourceIntersection, route.arrowStart];
                                    } else {
                                        var n = shortestPath.length - 2,
                                            p = vg2.V[shortestPath[n]].p,
                                            q = vg2.V[shortestPath[0]].p,
                                            lineData = [edge.source.innerBounds.rayIntersection(p.x, p.y)];
                                        for (var i = n; i >= 0; --i)
                                            lineData.push(vg2.V[shortestPath[i]].p);
                                        lineData.push(rectangle_1.makeEdgeTo(q, edge.target.innerBounds, 5));
                                    }
                                    return lineData;
                                };
                                Layout.getSourceIndex = function(e) {
                                    return typeof e.source === 'number' ? e.source : e.source.index;
                                };
                                Layout.getTargetIndex = function(e) {
                                    return typeof e.target === 'number' ? e.target : e.target.index;
                                };
                                Layout.linkId = function(e) {
                                    return Layout.getSourceIndex(e) + "-" + Layout.getTargetIndex(e);
                                };
                                Layout.dragStart = function(d) {
                                    if (isGroup(d)) {
                                        Layout.storeOffset(d, Layout.dragOrigin(d));
                                    } else {
                                        Layout.stopNode(d);
                                        d.fixed |= 2;
                                    }
                                };
                                Layout.stopNode = function(v) {
                                    v.px = v.x;
                                    v.py = v.y;
                                };
                                Layout.storeOffset = function(d, origin) {
                                    if (typeof d.leaves !== 'undefined') {
                                        d.leaves.forEach(function(v) {
                                            v.fixed |= 2;
                                            Layout.stopNode(v);
                                            v._dragGroupOffsetX = v.x - origin.x;
                                            v._dragGroupOffsetY = v.y - origin.y;
                                        });
                                    }
                                    if (typeof d.groups !== 'undefined') {
                                        d.groups.forEach(function(g) { return Layout.storeOffset(g, origin); });
                                    }
                                };
                                Layout.dragOrigin = function(d) {
                                    if (isGroup(d)) {
                                        return {
                                            x: d.bounds.cx(),
                                            y: d.bounds.cy()
                                        };
                                    } else {
                                        return d;
                                    }
                                };
                                Layout.drag = function(d, position) {
                                    if (isGroup(d)) {
                                        if (typeof d.leaves !== 'undefined') {
                                            d.leaves.forEach(function(v) {
                                                d.bounds.setXCentre(position.x);
                                                d.bounds.setYCentre(position.y);
                                                v.px = v._dragGroupOffsetX + position.x;
                                                v.py = v._dragGroupOffsetY + position.y;
                                            });
                                        }
                                        if (typeof d.groups !== 'undefined') {
                                            d.groups.forEach(function(g) { return Layout.drag(g, position); });
                                        }
                                    } else {
                                        d.px = position.x;
                                        d.py = position.y;
                                    }
                                };
                                Layout.dragEnd = function(d) {
                                    if (isGroup(d)) {
                                        if (typeof d.leaves !== 'undefined') {
                                            d.leaves.forEach(function(v) {
                                                Layout.dragEnd(v);
                                                delete v._dragGroupOffsetX;
                                                delete v._dragGroupOffsetY;
                                            });
                                        }
                                        if (typeof d.groups !== 'undefined') {
                                            d.groups.forEach(Layout.dragEnd);
                                        }
                                    } else {
                                        d.fixed &= ~6;
                                    }
                                };
                                Layout.mouseOver = function(d) {
                                    d.fixed |= 4;
                                    d.px = d.x, d.py = d.y;
                                };
                                Layout.mouseOut = function(d) {
                                    d.fixed &= ~4;
                                };
                                return Layout;
                            }());
                            exports.Layout = Layout;

                        }, { "./descent": 6, "./geom": 7, "./handledisconnected": 9, "./linklengths": 12, "./powergraph": 13, "./rectangle": 16, "./shortestpaths": 17 }],
                        11: [function(require, module, exports) {
                            "use strict";
                            var shortestpaths_1 = require("./shortestpaths");
                            var descent_1 = require("./descent");
                            var rectangle_1 = require("./rectangle");
                            var linklengths_1 = require("./linklengths");
                            var Link3D = (function() {
                                function Link3D(source, target) {
                                    this.source = source;
                                    this.target = target;
                                }
                                Link3D.prototype.actualLength = function(x) {
                                    var _this = this;
                                    return Math.sqrt(x.reduce(function(c, v) {
                                        var dx = v[_this.target] - v[_this.source];
                                        return c + dx * dx;
                                    }, 0));
                                };
                                return Link3D;
                            }());
                            exports.Link3D = Link3D;
                            var Node3D = (function() {
                                function Node3D(x, y, z) {
                                    if (x === void 0) { x = 0; }
                                    if (y === void 0) { y = 0; }
                                    if (z === void 0) { z = 0; }
                                    this.x = x;
                                    this.y = y;
                                    this.z = z;
                                }
                                return Node3D;
                            }());
                            exports.Node3D = Node3D;
                            var Layout3D = (function() {
                                function Layout3D(nodes, links, idealLinkLength) {
                                    if (idealLinkLength === void 0) { idealLinkLength = 1; }
                                    var _this = this;
                                    this.nodes = nodes;
                                    this.links = links;
                                    this.idealLinkLength = idealLinkLength;
                                    this.constraints = null;
                                    this.useJaccardLinkLengths = true;
                                    this.result = new Array(Layout3D.k);
                                    for (var i = 0; i < Layout3D.k; ++i) {
                                        this.result[i] = new Array(nodes.length);
                                    }
                                    nodes.forEach(function(v, i) {
                                        for (var _i = 0, _a = Layout3D.dims; _i < _a.length; _i++) {
                                            var dim = _a[_i];
                                            if (typeof v[dim] == 'undefined')
                                                v[dim] = Math.random();
                                        }
                                        _this.result[0][i] = v.x;
                                        _this.result[1][i] = v.y;
                                        _this.result[2][i] = v.z;
                                    });
                                };
                                Layout3D.prototype.linkLength = function(l) {
                                    return l.actualLength(this.result);
                                };
                                Layout3D.prototype.start = function(iterations) {
                                    var _this = this;
                                    if (iterations === void 0) { iterations = 100; }
                                    var n = this.nodes.length;
                                    var linkAccessor = new LinkAccessor();
                                    if (this.useJaccardLinkLengths)
                                        linklengths_1.jaccardLinkLengths(this.links, linkAccessor, 1.5);
                                    this.links.forEach(function(e) { return e.length *= _this.idealLinkLength; });
                                    var distanceMatrix = (new shortestpaths_1.Calculator(n, this.links, function(e) { return e.source; }, function(e) { return e.target; }, function(e) { return e.length; })).DistanceMatrix();
                                    var D = descent_1.Descent.createSquareMatrix(n, function(i, j) { return distanceMatrix[i][j]; });
                                    var G = descent_1.Descent.createSquareMatrix(n, function() { return 2; });
                                    this.links.forEach(function(_a) {
                                        var source = _a.source,
                                            target = _a.target;
                                        return G[source][target] = G[target][source] = 1;
                                    });
                                    this.descent = new descent_1.Descent(this.result, D);
                                    this.descent.threshold = 1e-3;
                                    this.descent.G = G;
                                    if (this.constraints)
                                        this.descent.project = new rectangle_1.Projection(this.nodes, null, null, this.constraints).projectFunctions();
                                    for (var i = 0; i < this.nodes.length; i++) {
                                        var v = this.nodes[i];
                                        if (v.fixed) {
                                            this.descent.locks.add(i, [v.x, v.y, v.z]);
                                        }
                                    }
                                    this.descent.run(iterations);
                                    return this;
                                };
                                Layout3D.prototype.tick = function() {
                                    this.descent.locks.clear();
                                    for (var i = 0; i < this.nodes.length; i++) {
                                        var v = this.nodes[i];
                                        if (v.fixed) {
                                            this.descent.locks.add(i, [v.x, v.y, v.z]);
                                        }
                                    }
                                    return this.descent.rungeKutta();
                                };
                                return Layout3D;
                            }());
                            Layout3D.dims = ['x', 'y', 'z'];
                            Layout3D.k = Layout3D.dims.length;
                            exports.Layout3D = Layout3D;
                            var LinkAccessor = (function() {
                                function LinkAccessor() {}
                                LinkAccessor.prototype.getSourceIndex = function(e) { return e.source; };
                                LinkAccessor.prototype.getTargetIndex = function(e) { return e.target; };
                                LinkAccessor.prototype.getLength = function(e) { return e.length; };
                                LinkAccessor.prototype.setLength = function(e, l) { e.length = l; };
                                return LinkAccessor;
                            }());

                        }, { "./descent": 6, "./linklengths": 12, "./rectangle": 16, "./shortestpaths": 17 }],
                        12: [function(require, module, exports) {
                            "use strict";

                            function unionCount(a, b) {
                                var u = {};
                                for (var i in a)
                                    u[i] = {};
                                for (var i in b)
                                    u[i] = {};
                                return Object.keys(u).length;
                            }

                            function intersectionCount(a, b) {
                                var n = 0;
                                for (var i in a)
                                    if (typeof b[i] !== 'undefined')
                                        ++n;
                                return n;
                            }

                            function getNeighbours(links, la) {
                                var neighbours = {};
                                var addNeighbours = function(u, v) {
                                    if (typeof neighbours[u] === 'undefined')
                                        neighbours[u] = {};
                                    neighbours[u][v] = {};
                                };
                                links.forEach(function(e) {
                                    var u = la.getSourceIndex(e),
                                        v = la.getTargetIndex(e);
                                    addNeighbours(u, v);
                                    addNeighbours(v, u);
                                });
                                return neighbours;
                            }

                            function computeLinkLengths(links, w, f, la) {
                                var neighbours = getNeighbours(links, la);
                                links.forEach(function(l) {
                                    var a = neighbours[la.getSourceIndex(l)];
                                    var b = neighbours[la.getTargetIndex(l)];
                                    la.setLength(l, 1 + w * f(a, b));
                                });
                            }

                            function symmetricDiffLinkLengths(links, la, w) {
                                if (w === void 0) { w = 1; }
                                computeLinkLengths(links, w, function(a, b) { return Math.sqrt(unionCount(a, b) - intersectionCount(a, b)); }, la);
                            }
                            exports.symmetricDiffLinkLengths = symmetricDiffLinkLengths;

                            function jaccardLinkLengths(links, la, w) {
                                if (w === void 0) { w = 1; }
                                computeLinkLengths(links, w, function(a, b) {
                                    return Math.min(Object.keys(a).length, Object.keys(b).length) < 1.1 ? 0 : intersectionCount(a, b) / unionCount(a, b);
                                }, la);
                            }
                            exports.jaccardLinkLengths = jaccardLinkLengths;

                            function generateDirectedEdgeConstraints(n, links, axis, la) {
                                var components = stronglyConnectedComponents(n, links, la);
                                var nodes = {};
                                components.forEach(function(c, i) {
                                    return c.forEach(function(v) { return nodes[v] = i; });
                                });
                                var constraints = [];
                                links.forEach(function(l) {
                                    var ui = la.getSourceIndex(l),
                                        vi = la.getTargetIndex(l),
                                        u = nodes[ui],
                                        v = nodes[vi];
                                    if (u !== v) {
                                        constraints.push({
                                            axis: axis,
                                            left: ui,
                                            right: vi,
                                            gap: la.getMinSeparation(l)
                                        });
                                    }
                                });
                                return constraints;
                            }
                            exports.generateDirectedEdgeConstraints = generateDirectedEdgeConstraints;

                            function stronglyConnectedComponents(numVertices, edges, la) {
                                var nodes = [];
                                var index = 0;
                                var stack = [];
                                var components = [];

                                function strongConnect(v) {
                                    v.index = v.lowlink = index++;
                                    stack.push(v);
                                    v.onStack = true;
                                    for (var _i = 0, _a = v.out; _i < _a.length; _i++) {
                                        var w = _a[_i];
                                        if (typeof w.index === 'undefined') {
                                            strongConnect(w);
                                            v.lowlink = Math.min(v.lowlink, w.lowlink);
                                        } else if (w.onStack) {
                                            v.lowlink = Math.min(v.lowlink, w.index);
                                        }
                                    }
                                    if (v.lowlink === v.index) {
                                        var component = [];
                                        while (stack.length) {
                                            w = stack.pop();
                                            w.onStack = false;
                                            component.push(w);
                                            if (w === v)
                                                break;
                                        }
                                        components.push(component.map(function(v) { return v.id; }));
                                    }
                                }
                                for (var i = 0; i < numVertices; i++) {
                                    nodes.push({ id: i, out: [] });
                                }
                                for (var _i = 0, edges_1 = edges; _i < edges_1.length; _i++) {
                                    var e = edges_1[_i];
                                    var v_1 = nodes[la.getSourceIndex(e)],
                                        w = nodes[la.getTargetIndex(e)];
                                    v_1.out.push(w);
                                }
                                for (var _a = 0, nodes_1 = nodes; _a < nodes_1.length; _a++) {
                                    var v = nodes_1[_a];
                                    if (typeof v.index === 'undefined')
                                        strongConnect(v);
                                }
                                return components;
                            }
                            exports.stronglyConnectedComponents = stronglyConnectedComponents;

                        }, {}],
                        13: [function(require, module, exports) {
                            "use strict";
                            var PowerEdge = (function() {
                                function PowerEdge(source, target, type) {
                                    this.source = source;
                                    this.target = target;
                                    this.type = type;
                                }
                                return PowerEdge;
                            }());
                            exports.PowerEdge = PowerEdge;
                            var Configuration = (function() {
                                function Configuration(n, edges, linkAccessor, rootGroup) {
                                    var _this = this;
                                    this.linkAccessor = linkAccessor;
                                    this.modules = new Array(n);
                                    this.roots = [];
                                    if (rootGroup) {
                                        this.initModulesFromGroup(rootGroup);
                                    } else {
                                        this.roots.push(new ModuleSet());
                                        for (var i = 0; i < n; ++i)
                                            this.roots[0].add(this.modules[i] = new Module(i));
                                    }
                                    this.R = edges.length;
                                    edges.forEach(function(e) {
                                        var s = _this.modules[linkAccessor.getSourceIndex(e)],
                                            t = _this.modules[linkAccessor.getTargetIndex(e)],
                                            type = linkAccessor.getType(e);
                                        s.outgoing.add(type, t);
                                        t.incoming.add(type, s);
                                    });
                                }
                                Configuration.prototype.initModulesFromGroup = function(group) {
                                    var moduleSet = new ModuleSet();
                                    this.roots.push(moduleSet);
                                    for (var i = 0; i < group.leaves.length; ++i) {
                                        var node = group.leaves[i];
                                        var module = new Module(node.id);
                                        this.modules[node.id] = module;
                                        moduleSet.add(module);
                                    }
                                    if (group.groups) {
                                        for (var j = 0; j < group.groups.length; ++j) {
                                            var child = group.groups[j];
                                            var definition = {};
                                            for (var prop in child)
                                                if (prop !== "leaves" && prop !== "groups" && child.hasOwnProperty(prop))
                                                    definition[prop] = child[prop];
                                            moduleSet.add(new Module(-1 - j, new LinkSets(), new LinkSets(), this.initModulesFromGroup(child), definition));
                                        }
                                    }
                                    return moduleSet;
                                };
                                Configuration.prototype.merge = function(a, b, k) {
                                    if (k === void 0) { k = 0; }
                                    var inInt = a.incoming.intersection(b.incoming),
                                        outInt = a.outgoing.intersection(b.outgoing);
                                    var children = new ModuleSet();
                                    children.add(a);
                                    children.add(b);
                                    var m = new Module(this.modules.length, outInt, inInt, children);
                                    this.modules.push(m);
                                    var update = function(s, i, o) {
                                        s.forAll(function(ms, linktype) {
                                            ms.forAll(function(n) {
                                                var nls = n[i];
                                                nls.add(linktype, m);
                                                nls.remove(linktype, a);
                                                nls.remove(linktype, b);
                                                a[o].remove(linktype, n);
                                                b[o].remove(linktype, n);
                                            });
                                        });
                                    };
                                    update(outInt, "incoming", "outgoing");
                                    update(inInt, "outgoing", "incoming");
                                    this.R -= inInt.count() + outInt.count();
                                    this.roots[k].remove(a);
                                    this.roots[k].remove(b);
                                    this.roots[k].add(m);
                                    return m;
                                };
                                Configuration.prototype.rootMerges = function(k) {
                                    if (k === void 0) { k = 0; }
                                    var rs = this.roots[k].modules();
                                    var n = rs.length;
                                    var merges = new Array(n * (n - 1));
                                    var ctr = 0;
                                    for (var i = 0, i_ = n - 1; i < i_; ++i) {
                                        for (var j = i + 1; j < n; ++j) {
                                            var a = rs[i],
                                                b = rs[j];
                                            merges[ctr] = { id: ctr, nEdges: this.nEdges(a, b), a: a, b: b };
                                            ctr++;
                                        }
                                    }
                                    return merges;
                                };
                                Configuration.prototype.greedyMerge = function() {
                                    for (var i = 0; i < this.roots.length; ++i) {
                                        if (this.roots[i].modules().length < 2)
                                            continue;
                                        var ms = this.rootMerges(i).sort(function(a, b) { return a.nEdges == b.nEdges ? a.id - b.id : a.nEdges - b.nEdges; });
                                        var m = ms[0];
                                        if (m.nEdges >= this.R)
                                            continue;
                                        this.merge(m.a, m.b, i);
                                        return true;
                                    }
                                };
                                Configuration.prototype.nEdges = function(a, b) {
                                    var inInt = a.incoming.intersection(b.incoming),
                                        outInt = a.outgoing.intersection(b.outgoing);
                                    return this.R - inInt.count() - outInt.count();
                                };
                                Configuration.prototype.getGroupHierarchy = function(retargetedEdges) {
                                    var _this = this;
                                    var groups = [];
                                    var root = {};
                                    toGroups(this.roots[0], root, groups);
                                    var es = this.allEdges();
                                    es.forEach(function(e) {
                                        var a = _this.modules[e.source];
                                        var b = _this.modules[e.target];
                                        retargetedEdges.push(new PowerEdge(typeof a.gid === "undefined" ? e.source : groups[a.gid], typeof b.gid === "undefined" ? e.target : groups[b.gid], e.type));
                                    });
                                    return groups;
                                };
                                Configuration.prototype.allEdges = function() {
                                    var es = [];
                                    Configuration.getEdges(this.roots[0], es);
                                    return es;
                                };
                                Configuration.getEdges = function(modules, es) {
                                    modules.forAll(function(m) {
                                        m.getEdges(es);
                                        Configuration.getEdges(m.children, es);
                                    });
                                };
                                return Configuration;
                            }());
                            exports.Configuration = Configuration;

                            function toGroups(modules, group, groups) {
                                modules.forAll(function(m) {
                                    if (m.isLeaf()) {
                                        if (!group.leaves)
                                            group.leaves = [];
                                        group.leaves.push(m.id);
                                    } else {
                                        var g = group;
                                        m.gid = groups.length;
                                        if (!m.isIsland() || m.isPredefined()) {
                                            g = { id: m.gid };
                                            if (m.isPredefined())
                                                for (var prop in m.definition)
                                                    g[prop] = m.definition[prop];
                                            if (!group.groups)
                                                group.groups = [];
                                            group.groups.push(m.gid);
                                            groups.push(g);
                                        }
                                        toGroups(m.children, g, groups);
                                    }
                                });
                            }
                            var Module = (function() {
                                function Module(id, outgoing, incoming, children, definition) {
                                    if (outgoing === void 0) { outgoing = new LinkSets(); }
                                    if (incoming === void 0) { incoming = new LinkSets(); }
                                    if (children === void 0) { children = new ModuleSet(); }
                                    this.id = id;
                                    this.outgoing = outgoing;
                                    this.incoming = incoming;
                                    this.children = children;
                                    this.definition = definition;
                                }
                                Module.prototype.getEdges = function(es) {
                                    var _this = this;
                                    this.outgoing.forAll(function(ms, edgetype) {
                                        ms.forAll(function(target) {
                                            es.push(new PowerEdge(_this.id, target.id, edgetype));
                                        });
                                    });
                                };
                                Module.prototype.isLeaf = function() {
                                    return this.children.count() === 0;
                                };
                                Module.prototype.isIsland = function() {
                                    return this.outgoing.count() === 0 && this.incoming.count() === 0;
                                };
                                Module.prototype.isPredefined = function() {
                                    return typeof this.definition !== "undefined";
                                };
                                return Module;
                            }());
                            exports.Module = Module;

                            function intersection(m, n) {
                                var i = {};
                                for (var v in m)
                                    if (v in n)
                                        i[v] = m[v];
                                return i;
                            }
                            var ModuleSet = (function() {
                                function ModuleSet() {
                                    this.table = {};
                                }
                                ModuleSet.prototype.count = function() {
                                    return Object.keys(this.table).length;
                                };
                                ModuleSet.prototype.intersection = function(other) {
                                    var result = new ModuleSet();
                                    result.table = intersection(this.table, other.table);
                                    return result;
                                };
                                ModuleSet.prototype.intersectionCount = function(other) {
                                    return this.intersection(other).count();
                                };
                                ModuleSet.prototype.contains = function(id) {
                                    return id in this.table;
                                };
                                ModuleSet.prototype.add = function(m) {
                                    this.table[m.id] = m;
                                };
                                ModuleSet.prototype.remove = function(m) {
                                    delete this.table[m.id];
                                };
                                ModuleSet.prototype.forAll = function(f) {
                                    for (var mid in this.table) {
                                        f(this.table[mid]);
                                    }
                                };
                                ModuleSet.prototype.modules = function() {
                                    var vs = [];
                                    this.forAll(function(m) {
                                        if (!m.isPredefined())
                                            vs.push(m);
                                    });
                                    return vs;
                                };
                                return ModuleSet;
                            }());
                            exports.ModuleSet = ModuleSet;
                            var LinkSets = (function() {
                                function LinkSets() {
                                    this.sets = {};
                                    this.n = 0;
                                }
                                LinkSets.prototype.count = function() {
                                    return this.n;
                                };
                                LinkSets.prototype.contains = function(id) {
                                    var result = false;
                                    this.forAllModules(function(m) {
                                        if (!result && m.id == id) {
                                            result = true;
                                        }
                                    });
                                    return result;
                                };
                                LinkSets.prototype.add = function(linktype, m) {
                                    var s = linktype in this.sets ? this.sets[linktype] : this.sets[linktype] = new ModuleSet();
                                    s.add(m);
                                    ++this.n;
                                };
                                LinkSets.prototype.remove = function(linktype, m) {
                                    var ms = this.sets[linktype];
                                    ms.remove(m);
                                    if (ms.count() === 0) {
                                        delete this.sets[linktype];
                                    }
                                    --this.n;
                                };
                                LinkSets.prototype.forAll = function(f) {
                                    for (var linktype in this.sets) {
                                        f(this.sets[linktype], Number(linktype));
                                    }
                                };
                                LinkSets.prototype.forAllModules = function(f) {
                                    this.forAll(function(ms, lt) { return ms.forAll(f); });
                                };
                                LinkSets.prototype.intersection = function(other) {
                                    var result = new LinkSets();
                                    this.forAll(function(ms, lt) {
                                        if (lt in other.sets) {
                                            var i = ms.intersection(other.sets[lt]),
                                                n = i.count();
                                            if (n > 0) {
                                                result.sets[lt] = i;
                                                result.n += n;
                                            }
                                        }
                                    });
                                    return result;
                                };
                                return LinkSets;
                            }());
                            exports.LinkSets = LinkSets;

                            function intersectionCount(m, n) {
                                return Object.keys(intersection(m, n)).length;
                            }

                            function getGroups(nodes, links, la, rootGroup) {
                                var n = nodes.length,
                                    c = new Configuration(n, links, la, rootGroup);
                                while (c.greedyMerge())
                                ;
                                var powerEdges = [];
                                var g = c.getGroupHierarchy(powerEdges);
                                powerEdges.forEach(function(e) {
                                    var f = function(end) {
                                        var g = e[end];
                                        if (typeof g == "number")
                                            e[end] = nodes[g];
                                    };
                                    f("source");
                                    f("target");
                                });
                                return { groups: g, powerEdges: powerEdges };
                            }
                            exports.getGroups = getGroups;

                        }, {}],
                        14: [function(require, module, exports) {
                            "use strict";
                            var PairingHeap = (function() {
                                function PairingHeap(elem) {
                                    this.elem = elem;
                                    this.subheaps = [];
                                }
                                PairingHeap.prototype.toString = function(selector) {
                                    var str = "",
                                        needComma = false;
                                    for (var i = 0; i < this.subheaps.length; ++i) {
                                        var subheap = this.subheaps[i];
                                        if (!subheap.elem) {
                                            needComma = false;
                                            continue;
                                        }
                                        if (needComma) {
                                            str = str + ",";
                                        }
                                        str = str + subheap.toString(selector);
                                        needComma = true;
                                    }
                                    if (str !== "") {
                                        str = "(" + str + ")";
                                    }
                                    return (this.elem ? selector(this.elem) : "") + str;
                                };
                                PairingHeap.prototype.forEach = function(f) {
                                    if (!this.empty()) {
                                        f(this.elem, this);
                                        this.subheaps.forEach(function(s) { return s.forEach(f); });
                                    }
                                };
                                PairingHeap.prototype.count = function() {
                                    return this.empty() ? 0 : 1 + this.subheaps.reduce(function(n, h) {
                                        return n + h.count();
                                    }, 0);
                                };
                                PairingHeap.prototype.min = function() {
                                    return this.elem;
                                };
                                PairingHeap.prototype.empty = function() {
                                    return this.elem == null;
                                };
                                PairingHeap.prototype.contains = function(h) {
                                    if (this === h)
                                        return true;
                                    for (var i = 0; i < this.subheaps.length; i++) {
                                        if (this.subheaps[i].contains(h))
                                            return true;
                                    }
                                    return false;
                                };
                                PairingHeap.prototype.isHeap = function(lessThan) {
                                    var _this = this;
                                    return this.subheaps.every(function(h) { return lessThan(_this.elem, h.elem) && h.isHeap(lessThan); });
                                };
                                PairingHeap.prototype.insert = function(obj, lessThan) {
                                    return this.merge(new PairingHeap(obj), lessThan);
                                };
                                PairingHeap.prototype.merge = function(heap2, lessThan) {
                                    if (this.empty())
                                        return heap2;
                                    else if (heap2.empty())
                                        return this;
                                    else if (lessThan(this.elem, heap2.elem)) {
                                        this.subheaps.push(heap2);
                                        return this;
                                    } else {
                                        heap2.subheaps.push(this);
                                        return heap2;
                                    }
                                };
                                PairingHeap.prototype.removeMin = function(lessThan) {
                                    if (this.empty())
                                        return null;
                                    else
                                        return this.mergePairs(lessThan);
                                };
                                PairingHeap.prototype.mergePairs = function(lessThan) {
                                    if (this.subheaps.length == 0)
                                        return new PairingHeap(null);
                                    else if (this.subheaps.length == 1) {
                                        return this.subheaps[0];
                                    } else {
                                        var firstPair = this.subheaps.pop().merge(this.subheaps.pop(), lessThan);
                                        var remaining = this.mergePairs(lessThan);
                                        return firstPair.merge(remaining, lessThan);
                                    }
                                };
                                PairingHeap.prototype.decreaseKey = function(subheap, newValue, setHeapNode, lessThan) {
                                    var newHeap = subheap.removeMin(lessThan);
                                    subheap.elem = newHeap.elem;
                                    subheap.subheaps = newHeap.subheaps;
                                    if (setHeapNode !== null && newHeap.elem !== null) {
                                        setHeapNode(subheap.elem, subheap);
                                    }
                                    var pairingNode = new PairingHeap(newValue);
                                    if (setHeapNode !== null) {
                                        setHeapNode(newValue, pairingNode);
                                    }
                                    return this.merge(pairingNode, lessThan);
                                };
                                return PairingHeap;
                            }());
                            exports.PairingHeap = PairingHeap;
                            var PriorityQueue = (function() {
                                function PriorityQueue(lessThan) {
                                    this.lessThan = lessThan;
                                }
                                PriorityQueue.prototype.top = function() {
                                    if (this.empty()) {
                                        return null;
                                    }
                                    return this.root.elem;
                                };
                                PriorityQueue.prototype.push = function() {
                                    var args = [];
                                    for (var _i = 0; _i < arguments.length; _i++) {
                                        args[_i] = arguments[_i];
                                    }
                                    var pairingNode;
                                    for (var i = 0, arg; arg = args[i]; ++i) {
                                        pairingNode = new PairingHeap(arg);
                                        this.root = this.empty() ?
                                            pairingNode : this.root.merge(pairingNode, this.lessThan);
                                    }
                                    return pairingNode;
                                };
                                PriorityQueue.prototype.empty = function() {
                                    return !this.root || !this.root.elem;
                                };
                                PriorityQueue.prototype.isHeap = function() {
                                    return this.root.isHeap(this.lessThan);
                                };
                                PriorityQueue.prototype.forEach = function(f) {
                                    this.root.forEach(f);
                                };
                                PriorityQueue.prototype.pop = function() {
                                    if (this.empty()) {
                                        return null;
                                    }
                                    var obj = this.root.min();
                                    this.root = this.root.removeMin(this.lessThan);
                                    return obj;
                                };
                                PriorityQueue.prototype.reduceKey = function(heapNode, newKey, setHeapNode) {
                                    if (setHeapNode === void 0) { setHeapNode = null; }
                                    this.root = this.root.decreaseKey(heapNode, newKey, setHeapNode, this.lessThan);
                                };
                                PriorityQueue.prototype.toString = function(selector) {
                                    return this.root.toString(selector);
                                };
                                PriorityQueue.prototype.count = function() {
                                    return this.root.count();
                                };
                                return PriorityQueue;
                            }());
                            exports.PriorityQueue = PriorityQueue;

                        }, {}],
                        15: [function(require, module, exports) {
                            "use strict";
                            var __extends = (this && this.__extends) || function(d, b) {
                                for (var p in b)
                                    if (b.hasOwnProperty(p)) d[p] = b[p];

                                function __() { this.constructor = d; }
                                d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
                            };
                            var TreeBase = (function() {
                                function TreeBase() {
                                    this.findIter = function(data) {
                                        var res = this._root;
                                        var iter = this.iterator();
                                        while (res !== null) {
                                            var c = this._comparator(data, res.data);
                                            if (c === 0) {
                                                iter._cursor = res;
                                                return iter;
                                            } else {
                                                iter._ancestors.push(res);
                                                res = res.get_child(c > 0);
                                            }
                                        }
                                        return null;
                                    };
                                }
                                TreeBase.prototype.clear = function() {
                                    this._root = null;
                                    this.size = 0;
                                };;
                                TreeBase.prototype.find = function(data) {
                                    var res = this._root;
                                    while (res !== null) {
                                        var c = this._comparator(data, res.data);
                                        if (c === 0) {
                                            return res.data;
                                        } else {
                                            res = res.get_child(c > 0);
                                        }
                                    }
                                    return null;
                                };;
                                TreeBase.prototype.lowerBound = function(data) {
                                    return this._bound(data, this._comparator);
                                };;
                                TreeBase.prototype.upperBound = function(data) {
                                    var cmp = this._comparator;

                                    function reverse_cmp(a, b) {
                                        return cmp(b, a);
                                    }
                                    return this._bound(data, reverse_cmp);
                                };;
                                TreeBase.prototype.min = function() {
                                    var res = this._root;
                                    if (res === null) {
                                        return null;
                                    }
                                    while (res.left !== null) {
                                        res = res.left;
                                    }
                                    return res.data;
                                };;
                                TreeBase.prototype.max = function() {
                                    var res = this._root;
                                    if (res === null) {
                                        return null;
                                    }
                                    while (res.right !== null) {
                                        res = res.right;
                                    }
                                    return res.data;
                                };;
                                TreeBase.prototype.iterator = function() {
                                    return new Iterator(this);
                                };;
                                TreeBase.prototype.each = function(cb) {
                                    var it = this.iterator(),
                                        data;
                                    while ((data = it.next()) !== null) {
                                        cb(data);
                                    }
                                };;
                                TreeBase.prototype.reach = function(cb) {
                                    var it = this.iterator(),
                                        data;
                                    while ((data = it.prev()) !== null) {
                                        cb(data);
                                    }
                                };;
                                TreeBase.prototype._bound = function(data, cmp) {
                                    var cur = this._root;
                                    var iter = this.iterator();
                                    while (cur !== null) {
                                        var c = this._comparator(data, cur.data);
                                        if (c === 0) {
                                            iter._cursor = cur;
                                            return iter;
                                        }
                                        iter._ancestors.push(cur);
                                        cur = cur.get_child(c > 0);
                                    }
                                    for (var i = iter._ancestors.length - 1; i >= 0; --i) {
                                        cur = iter._ancestors[i];
                                        if (cmp(data, cur.data) > 0) {
                                            iter._cursor = cur;
                                            iter._ancestors.length = i;
                                            return iter;
                                        }
                                    }
                                    iter._ancestors.length = 0;
                                    return iter;
                                };;
                                return TreeBase;
                            }());
                            exports.TreeBase = TreeBase;
                            var Iterator = (function() {
                                function Iterator(tree) {
                                    this._tree = tree;
                                    this._ancestors = [];
                                    this._cursor = null;
                                }
                                Iterator.prototype.data = function() {
                                    return this._cursor !== null ? this._cursor.data : null;
                                };;
                                Iterator.prototype.next = function() {
                                    if (this._cursor === null) {
                                        var root = this._tree._root;
                                        if (root !== null) {
                                            this._minNode(root);
                                        }
                                    } else {
                                        if (this._cursor.right === null) {
                                            var save;
                                            do {
                                                save = this._cursor;
                                                if (this._ancestors.length) {
                                                    this._cursor = this._ancestors.pop();
                                                } else {
                                                    this._cursor = null;
                                                    break;
                                                }
                                            } while (this._cursor.right === save);
                                        } else {
                                            this._ancestors.push(this._cursor);
                                            this._minNode(this._cursor.right);
                                        }
                                    }
                                    return this._cursor !== null ? this._cursor.data : null;
                                };;
                                Iterator.prototype.prev = function() {
                                    if (this._cursor === null) {
                                        var root = this._tree._root;
                                        if (root !== null) {
                                            this._maxNode(root);
                                        }
                                    } else {
                                        if (this._cursor.left === null) {
                                            var save;
                                            do {
                                                save = this._cursor;
                                                if (this._ancestors.length) {
                                                    this._cursor = this._ancestors.pop();
                                                } else {
                                                    this._cursor = null;
                                                    break;
                                                }
                                            } while (this._cursor.left === save);
                                        } else {
                                            this._ancestors.push(this._cursor);
                                            this._maxNode(this._cursor.left);
                                        }
                                    }
                                    return this._cursor !== null ? this._cursor.data : null;
                                };;
                                Iterator.prototype._minNode = function(start) {
                                    while (start.left !== null) {
                                        this._ancestors.push(start);
                                        start = start.left;
                                    }
                                    this._cursor = start;
                                };;
                                Iterator.prototype._maxNode = function(start) {
                                    while (start.right !== null) {
                                        this._ancestors.push(start);
                                        start = start.right;
                                    }
                                    this._cursor = start;
                                };;
                                return Iterator;
                            }());
                            exports.Iterator = Iterator;
                            var Node = (function() {
                                function Node(data) {
                                    this.data = data;
                                    this.left = null;
                                    this.right = null;
                                    this.red = true;
                                }
                                Node.prototype.get_child = function(dir) {
                                    return dir ? this.right : this.left;
                                };;
                                Node.prototype.set_child = function(dir, val) {
                                    if (dir) {
                                        this.right = val;
                                    } else {
                                        this.left = val;
                                    }
                                };;
                                return Node;
                            }());
                            var RBTree = (function(_super) {
                                __extends(RBTree, _super);

                                function RBTree(comparator) {
                                    var _this = _super.call(this) || this;
                                    _this._root = null;
                                    _this._comparator = comparator;
                                    _this.size = 0;
                                    return _this;
                                }
                                RBTree.prototype.insert = function(data) {
                                    var ret = false;
                                    if (this._root === null) {
                                        this._root = new Node(data);
                                        ret = true;
                                        this.size++;
                                    } else {
                                        var head = new Node(undefined);
                                        var dir = false;
                                        var last = false;
                                        var gp = null;
                                        var ggp = head;
                                        var p = null;
                                        var node = this._root;
                                        ggp.right = this._root;
                                        while (true) {
                                            if (node === null) {
                                                node = new Node(data);
                                                p.set_child(dir, node);
                                                ret = true;
                                                this.size++;
                                            } else if (RBTree.is_red(node.left) && RBTree.is_red(node.right)) {
                                                node.red = true;
                                                node.left.red = false;
                                                node.right.red = false;
                                            }
                                            if (RBTree.is_red(node) && RBTree.is_red(p)) {
                                                var dir2 = ggp.right === gp;
                                                if (node === p.get_child(last)) {
                                                    ggp.set_child(dir2, RBTree.single_rotate(gp, !last));
                                                } else {
                                                    ggp.set_child(dir2, RBTree.double_rotate(gp, !last));
                                                }
                                            }
                                            var cmp = this._comparator(node.data, data);
                                            if (cmp === 0) {
                                                break;
                                            }
                                            last = dir;
                                            dir = cmp < 0;
                                            if (gp !== null) {
                                                ggp = gp;
                                            }
                                            gp = p;
                                            p = node;
                                            node = node.get_child(dir);
                                        }
                                        this._root = head.right;
                                    }
                                    this._root.red = false;
                                    return ret;
                                };;
                                RBTree.prototype.remove = function(data) {
                                    if (this._root === null) {
                                        return false;
                                    }
                                    var head = new Node(undefined);
                                    var node = head;
                                    node.right = this._root;
                                    var p = null;
                                    var gp = null;
                                    var found = null;
                                    var dir = true;
                                    while (node.get_child(dir) !== null) {
                                        var last = dir;
                                        gp = p;
                                        p = node;
                                        node = node.get_child(dir);
                                        var cmp = this._comparator(data, node.data);
                                        dir = cmp > 0;
                                        if (cmp === 0) {
                                            found = node;
                                        }
                                        if (!RBTree.is_red(node) && !RBTree.is_red(node.get_child(dir))) {
                                            if (RBTree.is_red(node.get_child(!dir))) {
                                                var sr = RBTree.single_rotate(node, dir);
                                                p.set_child(last, sr);
                                                p = sr;
                                            } else if (!RBTree.is_red(node.get_child(!dir))) {
                                                var sibling = p.get_child(!last);
                                                if (sibling !== null) {
                                                    if (!RBTree.is_red(sibling.get_child(!last)) && !RBTree.is_red(sibling.get_child(last))) {
                                                        p.red = false;
                                                        sibling.red = true;
                                                        node.red = true;
                                                    } else {
                                                        var dir2 = gp.right === p;
                                                        if (RBTree.is_red(sibling.get_child(last))) {
                                                            gp.set_child(dir2, RBTree.double_rotate(p, last));
                                                        } else if (RBTree.is_red(sibling.get_child(!last))) {
                                                            gp.set_child(dir2, RBTree.single_rotate(p, last));
                                                        }
                                                        var gpc = gp.get_child(dir2);
                                                        gpc.red = true;
                                                        node.red = true;
                                                        gpc.left.red = false;
                                                        gpc.right.red = false;
                                                    }
                                                }
                                            }
                                        }
                                    }
                                    if (found !== null) {
                                        found.data = node.data;
                                        p.set_child(p.right === node, node.get_child(node.left === null));
                                        this.size--;
                                    }
                                    this._root = head.right;
                                    if (this._root !== null) {
                                        this._root.red = false;
                                    }
                                    return found !== null;
                                };;
                                RBTree.is_red = function(node) {
                                    return node !== null && node.red;
                                };
                                RBTree.single_rotate = function(root, dir) {
                                    var save = root.get_child(!dir);
                                    root.set_child(!dir, save.get_child(dir));
                                    save.set_child(dir, root);
                                    root.red = true;
                                    save.red = false;
                                    return save;
                                };
                                RBTree.double_rotate = function(root, dir) {
                                    root.set_child(!dir, RBTree.single_rotate(root.get_child(!dir), !dir));
                                    return RBTree.single_rotate(root, dir);
                                };
                                return RBTree;
                            }(TreeBase));
                            exports.RBTree = RBTree;

                        }, {}],
                        16: [function(require, module, exports) {
                            "use strict";
                            var __extends = (this && this.__extends) || function(d, b) {
                                for (var p in b)
                                    if (b.hasOwnProperty(p)) d[p] = b[p];

                                function __() { this.constructor = d; }
                                d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
                            };
                            var vpsc_1 = require("./vpsc");
                            var rbtree_1 = require("./rbtree");

                            function computeGroupBounds(g) {
                                g.bounds = typeof g.leaves !== "undefined" ?
                                    g.leaves.reduce(function(r, c) { return c.bounds.union(r); }, Rectangle.empty()) :
                                    Rectangle.empty();
                                if (typeof g.groups !== "undefined")
                                    g.bounds = g.groups.reduce(function(r, c) { return computeGroupBounds(c).union(r); }, g.bounds);
                                g.bounds = g.bounds.inflate(g.padding);
                                return g.bounds;
                            }
                            exports.computeGroupBounds = computeGroupBounds;
                            var Rectangle = (function() {
                                function Rectangle(x, X, y, Y) {
                                    this.x = x;
                                    this.X = X;
                                    this.y = y;
                                    this.Y = Y;
                                }
                                Rectangle.empty = function() { return new Rectangle(Number.POSITIVE_INFINITY, Number.NEGATIVE_INFINITY, Number.POSITIVE_INFINITY, Number.NEGATIVE_INFINITY); };
                                Rectangle.prototype.cx = function() { return (this.x + this.X) / 2; };
                                Rectangle.prototype.cy = function() { return (this.y + this.Y) / 2; };
                                Rectangle.prototype.overlapX = function(r) {
                                    var ux = this.cx(),
                                        vx = r.cx();
                                    if (ux <= vx && r.x < this.X)
                                        return this.X - r.x;
                                    if (vx <= ux && this.x < r.X)
                                        return r.X - this.x;
                                    return 0;
                                };
                                Rectangle.prototype.overlapY = function(r) {
                                    var uy = this.cy(),
                                        vy = r.cy();
                                    if (uy <= vy && r.y < this.Y)
                                        return this.Y - r.y;
                                    if (vy <= uy && this.y < r.Y)
                                        return r.Y - this.y;
                                    return 0;
                                };
                                Rectangle.prototype.setXCentre = function(cx) {
                                    var dx = cx - this.cx();
                                    this.x += dx;
                                    this.X += dx;
                                };
                                Rectangle.prototype.setYCentre = function(cy) {
                                    var dy = cy - this.cy();
                                    this.y += dy;
                                    this.Y += dy;
                                };
                                Rectangle.prototype.width = function() {
                                    return this.X - this.x;
                                };
                                Rectangle.prototype.height = function() {
                                    return this.Y - this.y;
                                };
                                Rectangle.prototype.union = function(r) {
                                    return new Rectangle(Math.min(this.x, r.x), Math.max(this.X, r.X), Math.min(this.y, r.y), Math.max(this.Y, r.Y));
                                };
                                Rectangle.prototype.lineIntersections = function(x1, y1, x2, y2) {
                                    var sides = [
                                        [this.x, this.y, this.X, this.y],
                                        [this.X, this.y, this.X, this.Y],
                                        [this.X, this.Y, this.x, this.Y],
                                        [this.x, this.Y, this.x, this.y]
                                    ];
                                    var intersections = [];
                                    for (var i = 0; i < 4; ++i) {
                                        var r = Rectangle.lineIntersection(x1, y1, x2, y2, sides[i][0], sides[i][1], sides[i][2], sides[i][3]);
                                        if (r !== null)
                                            intersections.push({ x: r.x, y: r.y });
                                    }
                                    return intersections;
                                };
                                Rectangle.prototype.rayIntersection = function(x2, y2) {
                                    var ints = this.lineIntersections(this.cx(), this.cy(), x2, y2);
                                    return ints.length > 0 ? ints[0] : null;
                                };
                                Rectangle.prototype.vertices = function() {
                                    return [
                                        { x: this.x, y: this.y },
                                        { x: this.X, y: this.y },
                                        { x: this.X, y: this.Y },
                                        { x: this.x, y: this.Y },
                                        { x: this.x, y: this.y }
                                    ];
                                };
                                Rectangle.lineIntersection = function(x1, y1, x2, y2, x3, y3, x4, y4) {
                                    var dx12 = x2 - x1,
                                        dx34 = x4 - x3,
                                        dy12 = y2 - y1,
                                        dy34 = y4 - y3,
                                        denominator = dy34 * dx12 - dx34 * dy12;
                                    if (denominator == 0)
                                        return null;
                                    var dx31 = x1 - x3,
                                        dy31 = y1 - y3,
                                        numa = dx34 * dy31 - dy34 * dx31,
                                        a = numa / denominator,
                                        numb = dx12 * dy31 - dy12 * dx31,
                                        b = numb / denominator;
                                    if (a >= 0 && a <= 1 && b >= 0 && b <= 1) {
                                        return {
                                            x: x1 + a * dx12,
                                            y: y1 + a * dy12
                                        };
                                    }
                                    return null;
                                };
                                Rectangle.prototype.inflate = function(pad) {
                                    return new Rectangle(this.x - pad, this.X + pad, this.y - pad, this.Y + pad);
                                };
                                return Rectangle;
                            }());
                            exports.Rectangle = Rectangle;

                            function makeEdgeBetween(source, target, ah) {
                                var si = source.rayIntersection(target.cx(), target.cy()) || { x: source.cx(), y: source.cy() },
                                    ti = target.rayIntersection(source.cx(), source.cy()) || { x: target.cx(), y: target.cy() },
                                    dx = ti.x - si.x,
                                    dy = ti.y - si.y,
                                    l = Math.sqrt(dx * dx + dy * dy),
                                    al = l - ah;
                                return {
                                    sourceIntersection: si,
                                    targetIntersection: ti,
                                    arrowStart: { x: si.x + al * dx / l, y: si.y + al * dy / l }
                                };
                            }
                            exports.makeEdgeBetween = makeEdgeBetween;

                            function makeEdgeTo(s, target, ah) {
                                var ti = target.rayIntersection(s.x, s.y);
                                if (!ti)
                                    ti = { x: target.cx(), y: target.cy() };
                                var dx = ti.x - s.x,
                                    dy = ti.y - s.y,
                                    l = Math.sqrt(dx * dx + dy * dy);
                                return { x: ti.x - ah * dx / l, y: ti.y - ah * dy / l };
                            }
                            exports.makeEdgeTo = makeEdgeTo;
                            var Node = (function() {
                                function Node(v, r, pos) {
                                    this.v = v;
                                    this.r = r;
                                    this.pos = pos;
                                    this.prev = makeRBTree();
                                    this.next = makeRBTree();
                                }
                                return Node;
                            }());
                            var Event = (function() {
                                function Event(isOpen, v, pos) {
                                    this.isOpen = isOpen;
                                    this.v = v;
                                    this.pos = pos;
                                }
                                return Event;
                            }());

                            function compareEvents(a, b) {
                                if (a.pos > b.pos) {
                                    return 1;
                                }
                                if (a.pos < b.pos) {
                                    return -1;
                                }
                                if (a.isOpen) {
                                    return -1;
                                }
                                if (b.isOpen) {
                                    return 1;
                                }
                                return 0;
                            }

                            function makeRBTree() {
                                return new rbtree_1.RBTree(function(a, b) { return a.pos - b.pos; });
                            }
                            var xRect = {
                                getCentre: function(r) { return r.cx(); },
                                getOpen: function(r) { return r.y; },
                                getClose: function(r) { return r.Y; },
                                getSize: function(r) { return r.width(); },
                                makeRect: function(open, close, center, size) { return new Rectangle(center - size / 2, center + size / 2, open, close); },
                                findNeighbours: findXNeighbours
                            };
                            var yRect = {
                                getCentre: function(r) { return r.cy(); },
                                getOpen: function(r) { return r.x; },
                                getClose: function(r) { return r.X; },
                                getSize: function(r) { return r.height(); },
                                makeRect: function(open, close, center, size) { return new Rectangle(open, close, center - size / 2, center + size / 2); },
                                findNeighbours: findYNeighbours
                            };

                            function generateGroupConstraints(root, f, minSep, isContained) {
                                if (isContained === void 0) { isContained = false; }
                                var padding = root.padding,
                                    gn = typeof root.groups !== 'undefined' ? root.groups.length : 0,
                                    ln = typeof root.leaves !== 'undefined' ? root.leaves.length : 0,
                                    childConstraints = !gn ? [] :
                                    root.groups.reduce(function(ccs, g) { return ccs.concat(generateGroupConstraints(g, f, minSep, true)); }, []),
                                    n = (isContained ? 2 : 0) + ln + gn,
                                    vs = new Array(n),
                                    rs = new Array(n),
                                    i = 0,
                                    add = function(r, v) {
                                        rs[i] = r;
                                        vs[i++] = v;
                                    };
                                if (isContained) {
                                    var b = root.bounds,
                                        c = f.getCentre(b),
                                        s = f.getSize(b) / 2,
                                        open = f.getOpen(b),
                                        close = f.getClose(b),
                                        min = c - s + padding / 2,
                                        max = c + s - padding / 2;
                                    root.minVar.desiredPosition = min;
                                    add(f.makeRect(open, close, min, padding), root.minVar);
                                    root.maxVar.desiredPosition = max;
                                    add(f.makeRect(open, close, max, padding), root.maxVar);
                                }
                                if (ln)
                                    root.leaves.forEach(function(l) { return add(l.bounds, l.variable); });
                                if (gn)
                                    root.groups.forEach(function(g) {
                                        var b = g.bounds;
                                        add(f.makeRect(f.getOpen(b), f.getClose(b), f.getCentre(b), f.getSize(b)), g.minVar);
                                    });
                                var cs = generateConstraints(rs, vs, f, minSep);
                                if (gn) {
                                    vs.forEach(function(v) { v.cOut = [], v.cIn = []; });
                                    cs.forEach(function(c) { c.left.cOut.push(c), c.right.cIn.push(c); });
                                    root.groups.forEach(function(g) {
                                        var gapAdjustment = (g.padding - f.getSize(g.bounds)) / 2;
                                        g.minVar.cIn.forEach(function(c) { return c.gap += gapAdjustment; });
                                        g.minVar.cOut.forEach(function(c) {
                                            c.left = g.maxVar;
                                            c.gap += gapAdjustment;
                                        });
                                    });
                                }
                                return childConstraints.concat(cs);
                            }

                            function generateConstraints(rs, vars, rect, minSep) {
                                var i, n = rs.length;
                                var N = 2 * n;
                                console.assert(vars.length >= n);
                                var events = new Array(N);
                                for (i = 0; i < n; ++i) {
                                    var r = rs[i];
                                    var v = new Node(vars[i], r, rect.getCentre(r));
                                    events[i] = new Event(true, v, rect.getOpen(r));
                                    events[i + n] = new Event(false, v, rect.getClose(r));
                                }
                                events.sort(compareEvents);
                                var cs = new Array();
                                var scanline = makeRBTree();
                                for (i = 0; i < N; ++i) {
                                    var e = events[i];
                                    var v = e.v;
                                    if (e.isOpen) {
                                        scanline.insert(v);
                                        rect.findNeighbours(v, scanline);
                                    } else {
                                        scanline.remove(v);
                                        var makeConstraint = function(l, r) {
                                            var sep = (rect.getSize(l.r) + rect.getSize(r.r)) / 2 + minSep;
                                            cs.push(new vpsc_1.Constraint(l.v, r.v, sep));
                                        };
                                        var visitNeighbours = function(forward, reverse, mkcon) {
                                            var u, it = v[forward].iterator();
                                            while ((u = it[forward]()) !== null) {
                                                mkcon(u, v);
                                                u[reverse].remove(v);
                                            }
                                        };
                                        visitNeighbours("prev", "next", function(u, v) { return makeConstraint(u, v); });
                                        visitNeighbours("next", "prev", function(u, v) { return makeConstraint(v, u); });
                                    }
                                }
                                console.assert(scanline.size === 0);
                                return cs;
                            }

                            function findXNeighbours(v, scanline) {
                                var f = function(forward, reverse) {
                                    var it = scanline.findIter(v);
                                    var u;
                                    while ((u = it[forward]()) !== null) {
                                        var uovervX = u.r.overlapX(v.r);
                                        if (uovervX <= 0 || uovervX <= u.r.overlapY(v.r)) {
                                            v[forward].insert(u);
                                            u[reverse].insert(v);
                                        }
                                        if (uovervX <= 0) {
                                            break;
                                        }
                                    }
                                };
                                f("next", "prev");
                                f("prev", "next");
                            }

                            function findYNeighbours(v, scanline) {
                                var f = function(forward, reverse) {
                                    var u = scanline.findIter(v)[forward]();
                                    if (u !== null && u.r.overlapX(v.r) > 0) {
                                        v[forward].insert(u);
                                        u[reverse].insert(v);
                                    }
                                };
                                f("next", "prev");
                                f("prev", "next");
                            }

                            function generateXConstraints(rs, vars) {
                                return generateConstraints(rs, vars, xRect, 1e-6);
                            }
                            exports.generateXConstraints = generateXConstraints;

                            function generateYConstraints(rs, vars) {
                                return generateConstraints(rs, vars, yRect, 1e-6);
                            }
                            exports.generateYConstraints = generateYConstraints;

                            function generateXGroupConstraints(root) {
                                return generateGroupConstraints(root, xRect, 1e-6);
                            }
                            exports.generateXGroupConstraints = generateXGroupConstraints;

                            function generateYGroupConstraints(root) {
                                return generateGroupConstraints(root, yRect, 1e-6);
                            }
                            exports.generateYGroupConstraints = generateYGroupConstraints;

                            function removeOverlaps(rs) {
                                var vs = rs.map(function(r) { return new vpsc_1.Variable(r.cx()); });
                                var cs = generateXConstraints(rs, vs);
                                var solver = new vpsc_1.Solver(vs, cs);
                                solver.solve();
                                vs.forEach(function(v, i) { return rs[i].setXCentre(v.position()); });
                                vs = rs.map(function(r) { return new vpsc_1.Variable(r.cy()); });
                                cs = generateYConstraints(rs, vs);
                                solver = new vpsc_1.Solver(vs, cs);
                                solver.solve();
                                vs.forEach(function(v, i) { return rs[i].setYCentre(v.position()); });
                            }
                            exports.removeOverlaps = removeOverlaps;
                            var IndexedVariable = (function(_super) {
                                __extends(IndexedVariable, _super);

                                function IndexedVariable(index, w) {
                                    var _this = _super.call(this, 0, w) || this;
                                    _this.index = index;
                                    return _this;
                                }
                                return IndexedVariable;
                            }(vpsc_1.Variable));
                            exports.IndexedVariable = IndexedVariable;
                            var Projection = (function() {
                                function Projection(nodes, groups, rootGroup, constraints, avoidOverlaps) {
                                    if (rootGroup === void 0) { rootGroup = null; }
                                    if (constraints === void 0) { constraints = null; }
                                    if (avoidOverlaps === void 0) { avoidOverlaps = false; }
                                    var _this = this;
                                    this.nodes = nodes;
                                    this.groups = groups;
                                    this.rootGroup = rootGroup;
                                    this.avoidOverlaps = avoidOverlaps;
                                    this.variables = nodes.map(function(v, i) {
                                        return v.variable = new IndexedVariable(i, 1);
                                    });
                                    if (constraints)
                                        this.createConstraints(constraints);
                                    if (avoidOverlaps && rootGroup && typeof rootGroup.groups !== 'undefined') {
                                        nodes.forEach(function(v) {
                                            if (!v.width || !v.height) {
                                                v.bounds = new Rectangle(v.x, v.x, v.y, v.y);
                                                return;
                                            }
                                            var w2 = v.width / 2,
                                                h2 = v.height / 2;
                                            v.bounds = new Rectangle(v.x - w2, v.x + w2, v.y - h2, v.y + h2);
                                        });
                                        computeGroupBounds(rootGroup);
                                        var i = nodes.length;
                                        groups.forEach(function(g) {
                                            _this.variables[i] = g.minVar = new IndexedVariable(i++, typeof g.stiffness !== "undefined" ? g.stiffness : 0.01);
                                            _this.variables[i] = g.maxVar = new IndexedVariable(i++, typeof g.stiffness !== "undefined" ? g.stiffness : 0.01);
                                        });
                                    }
                                }
                                Projection.prototype.createSeparation = function(c) {
                                    return new vpsc_1.Constraint(this.nodes[c.left].variable, this.nodes[c.right].variable, c.gap, typeof c.equality !== "undefined" ? c.equality : false);
                                };
                                Projection.prototype.makeFeasible = function(c) {
                                    var _this = this;
                                    if (!this.avoidOverlaps)
                                        return;
                                    var axis = 'x',
                                        dim = 'width';
                                    if (c.axis === 'x')
                                        axis = 'y', dim = 'height';
                                    var vs = c.offsets.map(function(o) { return _this.nodes[o.node]; }).sort(function(a, b) { return a[axis] - b[axis]; });
                                    var p = null;
                                    vs.forEach(function(v) {
                                        if (p)
                                            v[axis] = p[axis] + p[dim] + 1;
                                        p = v;
                                    });
                                };
                                Projection.prototype.createAlignment = function(c) {
                                    var _this = this;
                                    var u = this.nodes[c.offsets[0].node].variable;
                                    this.makeFeasible(c);
                                    var cs = c.axis === 'x' ? this.xConstraints : this.yConstraints;
                                    c.offsets.slice(1).forEach(function(o) {
                                        var v = _this.nodes[o.node].variable;
                                        cs.push(new vpsc_1.Constraint(u, v, o.offset, true));
                                    });
                                };
                                Projection.prototype.createConstraints = function(constraints) {
                                    var _this = this;
                                    var isSep = function(c) { return typeof c.type === 'undefined' || c.type === 'separation'; };
                                    this.xConstraints = constraints
                                        .filter(function(c) { return c.axis === "x" && isSep(c); })
                                        .map(function(c) { return _this.createSeparation(c); });
                                    this.yConstraints = constraints
                                        .filter(function(c) { return c.axis === "y" && isSep(c); })
                                        .map(function(c) { return _this.createSeparation(c); });
                                    constraints
                                        .filter(function(c) { return c.type === 'alignment'; })
                                        .forEach(function(c) { return _this.createAlignment(c); });
                                };
                                Projection.prototype.setupVariablesAndBounds = function(x0, y0, desired, getDesired) {
                                    this.nodes.forEach(function(v, i) {
                                        if (v.fixed) {
                                            v.variable.weight = v.fixedWeight ? v.fixedWeight : 1000;
                                            desired[i] = getDesired(v);
                                        } else {
                                            v.variable.weight = 1;
                                        }
                                        var w = (v.width || 0) / 2,
                                            h = (v.height || 0) / 2;
                                        var ix = x0[i],
                                            iy = y0[i];
                                        v.bounds = new Rectangle(ix - w, ix + w, iy - h, iy + h);
                                    });
                                };
                                Projection.prototype.xProject = function(x0, y0, x) {
                                    if (!this.rootGroup && !(this.avoidOverlaps || this.xConstraints))
                                        return;
                                    this.project(x0, y0, x0, x, function(v) { return v.px; }, this.xConstraints, generateXGroupConstraints, function(v) { return v.bounds.setXCentre(x[v.variable.index] = v.variable.position()); }, function(g) {
                                        var xmin = x[g.minVar.index] = g.minVar.position();
                                        var xmax = x[g.maxVar.index] = g.maxVar.position();
                                        var p2 = g.padding / 2;
                                        g.bounds.x = xmin - p2;
                                        g.bounds.X = xmax + p2;
                                    });
                                };
                                Projection.prototype.yProject = function(x0, y0, y) {
                                    if (!this.rootGroup && !this.yConstraints)
                                        return;
                                    this.project(x0, y0, y0, y, function(v) { return v.py; }, this.yConstraints, generateYGroupConstraints, function(v) { return v.bounds.setYCentre(y[v.variable.index] = v.variable.position()); }, function(g) {
                                        var ymin = y[g.minVar.index] = g.minVar.position();
                                        var ymax = y[g.maxVar.index] = g.maxVar.position();
                                        var p2 = g.padding / 2;
                                        g.bounds.y = ymin - p2;;
                                        g.bounds.Y = ymax + p2;
                                    });
                                };
                                Projection.prototype.projectFunctions = function() {
                                    var _this = this;
                                    return [
                                        function(x0, y0, x) { return _this.xProject(x0, y0, x); },
                                        function(x0, y0, y) { return _this.yProject(x0, y0, y); }
                                    ];
                                };
                                Projection.prototype.project = function(x0, y0, start, desired, getDesired, cs, generateConstraints, updateNodeBounds, updateGroupBounds) {
                                    this.setupVariablesAndBounds(x0, y0, desired, getDesired);
                                    if (this.rootGroup && this.avoidOverlaps) {
                                        computeGroupBounds(this.rootGroup);
                                        cs = cs.concat(generateConstraints(this.rootGroup));
                                    }
                                    this.solve(this.variables, cs, start, desired);
                                    this.nodes.forEach(updateNodeBounds);
                                    if (this.rootGroup && this.avoidOverlaps) {
                                        this.groups.forEach(updateGroupBounds);
                                        computeGroupBounds(this.rootGroup);
                                    }
                                };
                                Projection.prototype.solve = function(vs, cs, starting, desired) {
                                    var solver = new vpsc_1.Solver(vs, cs);
                                    solver.setStartingPositions(starting);
                                    solver.setDesiredPositions(desired);
                                    solver.solve();
                                };
                                return Projection;
                            }());
                            exports.Projection = Projection;

                        }, { "./rbtree": 15, "./vpsc": 18 }],
                        17: [function(require, module, exports) {
                            "use strict";
                            var pqueue_1 = require("./pqueue");
                            var Neighbour = (function() {
                                function Neighbour(id, distance) {
                                    this.id = id;
                                    this.distance = distance;
                                }
                                return Neighbour;
                            }());
                            var Node = (function() {
                                function Node(id) {
                                    this.id = id;
                                    this.neighbours = [];
                                }
                                return Node;
                            }());
                            var QueueEntry = (function() {
                                function QueueEntry(node, prev, d) {
                                    this.node = node;
                                    this.prev = prev;
                                    this.d = d;
                                }
                                return QueueEntry;
                            }());
                            var Calculator = (function() {
                                function Calculator(n, es, getSourceIndex, getTargetIndex, getLength) {
                                    this.n = n;
                                    this.es = es;
                                    this.neighbours = new Array(this.n);
                                    var i = this.n;
                                    while (i--)
                                        this.neighbours[i] = new Node(i);
                                    i = this.es.length;
                                    while (i--) {
                                        var e = this.es[i];
                                        var u = getSourceIndex(e),
                                            v = getTargetIndex(e);
                                        var d = getLength(e);
                                        this.neighbours[u].neighbours.push(new Neighbour(v, d));
                                        this.neighbours[v].neighbours.push(new Neighbour(u, d));
                                    }
                                }
                                Calculator.prototype.DistanceMatrix = function() {
                                    var D = new Array(this.n);
                                    for (var i = 0; i < this.n; ++i) {
                                        D[i] = this.dijkstraNeighbours(i);
                                    }
                                    return D;
                                };
                                Calculator.prototype.DistancesFromNode = function(start) {
                                    return this.dijkstraNeighbours(start);
                                };
                                Calculator.prototype.PathFromNodeToNode = function(start, end) {
                                    return this.dijkstraNeighbours(start, end);
                                };
                                Calculator.prototype.PathFromNodeToNodeWithPrevCost = function(start, end, prevCost) {
                                    var q = new pqueue_1.PriorityQueue(function(a, b) { return a.d <= b.d; }),
                                        u = this.neighbours[start],
                                        qu = new QueueEntry(u, null, 0),
                                        visitedFrom = {};
                                    q.push(qu);
                                    while (!q.empty()) {
                                        qu = q.pop();
                                        u = qu.node;
                                        if (u.id === end) {
                                            break;
                                        }
                                        var i = u.neighbours.length;
                                        while (i--) {
                                            var neighbour = u.neighbours[i],
                                                v = this.neighbours[neighbour.id];
                                            if (qu.prev && v.id === qu.prev.node.id)
                                                continue;
                                            var viduid = v.id + ',' + u.id;
                                            if (viduid in visitedFrom && visitedFrom[viduid] <= qu.d)
                                                continue;
                                            var cc = qu.prev ? prevCost(qu.prev.node.id, u.id, v.id) : 0,
                                                t = qu.d + neighbour.distance + cc;
                                            visitedFrom[viduid] = t;
                                            q.push(new QueueEntry(v, qu, t));
                                        }
                                    }
                                    var path = [];
                                    while (qu.prev) {
                                        qu = qu.prev;
                                        path.push(qu.node.id);
                                    }
                                    return path;
                                };
                                Calculator.prototype.dijkstraNeighbours = function(start, dest) {
                                    if (dest === void 0) { dest = -1; }
                                    var q = new pqueue_1.PriorityQueue(function(a, b) { return a.d <= b.d; }),
                                        i = this.neighbours.length,
                                        d = new Array(i);
                                    while (i--) {
                                        var node = this.neighbours[i];
                                        node.d = i === start ? 0 : Number.POSITIVE_INFINITY;
                                        node.q = q.push(node);
                                    }
                                    while (!q.empty()) {
                                        var u = q.pop();
                                        d[u.id] = u.d;
                                        if (u.id === dest) {
                                            var path = [];
                                            var v = u;
                                            while (typeof v.prev !== 'undefined') {
                                                path.push(v.prev.id);
                                                v = v.prev;
                                            }
                                            return path;
                                        }
                                        i = u.neighbours.length;
                                        while (i--) {
                                            var neighbour = u.neighbours[i];
                                            var v = this.neighbours[neighbour.id];
                                            var t = u.d + neighbour.distance;
                                            if (u.d !== Number.MAX_VALUE && v.d > t) {
                                                v.d = t;
                                                v.prev = u;
                                                q.reduceKey(v.q, v, function(e, q) { return e.q = q; });
                                            }
                                        }
                                    }
                                    return d;
                                };
                                return Calculator;
                            }());
                            exports.Calculator = Calculator;

                        }, { "./pqueue": 14 }],
                        18: [function(require, module, exports) {
                            "use strict";
                            var PositionStats = (function() {
                                function PositionStats(scale) {
                                    this.scale = scale;
                                    this.AB = 0;
                                    this.AD = 0;
                                    this.A2 = 0;
                                }
                                PositionStats.prototype.addVariable = function(v) {
                                    var ai = this.scale / v.scale;
                                    var bi = v.offset / v.scale;
                                    var wi = v.weight;
                                    this.AB += wi * ai * bi;
                                    this.AD += wi * ai * v.desiredPosition;
                                    this.A2 += wi * ai * ai;
                                };
                                PositionStats.prototype.getPosn = function() {
                                    return (this.AD - this.AB) / this.A2;
                                };
                                return PositionStats;
                            }());
                            exports.PositionStats = PositionStats;
                            var Constraint = (function() {
                                function Constraint(left, right, gap, equality) {
                                    if (equality === void 0) { equality = false; }
                                    this.left = left;
                                    this.right = right;
                                    this.gap = gap;
                                    this.equality = equality;
                                    this.active = false;
                                    this.unsatisfiable = false;
                                    this.left = left;
                                    this.right = right;
                                    this.gap = gap;
                                    this.equality = equality;
                                }
                                Constraint.prototype.slack = function() {
                                    return this.unsatisfiable ? Number.MAX_VALUE :
                                        this.right.scale * this.right.position() - this.gap -
                                        this.left.scale * this.left.position();
                                };
                                return Constraint;
                            }());
                            exports.Constraint = Constraint;
                            var Variable = (function() {
                                function Variable(desiredPosition, weight, scale) {
                                    if (weight === void 0) { weight = 1; }
                                    if (scale === void 0) { scale = 1; }
                                    this.desiredPosition = desiredPosition;
                                    this.weight = weight;
                                    this.scale = scale;
                                    this.offset = 0;
                                }
                                Variable.prototype.dfdv = function() {
                                    return 2.0 * this.weight * (this.position() - this.desiredPosition);
                                };
                                Variable.prototype.position = function() {
                                    return (this.block.ps.scale * this.block.posn + this.offset) / this.scale;
                                };
                                Variable.prototype.visitNeighbours = function(prev, f) {
                                    var ff = function(c, next) { return c.active && prev !== next && f(c, next); };
                                    this.cOut.forEach(function(c) { return ff(c, c.right); });
                                    this.cIn.forEach(function(c) { return ff(c, c.left); });
                                };
                                return Variable;
                            }());
                            exports.Variable = Variable;
                            var Block = (function() {
                                function Block(v) {
                                    this.vars = [];
                                    v.offset = 0;
                                    this.ps = new PositionStats(v.scale);
                                    this.addVariable(v);
                                }
                                Block.prototype.addVariable = function(v) {
                                    v.block = this;
                                    this.vars.push(v);
                                    this.ps.addVariable(v);
                                    this.posn = this.ps.getPosn();
                                };
                                Block.prototype.updateWeightedPosition = function() {
                                    this.ps.AB = this.ps.AD = this.ps.A2 = 0;
                                    for (var i = 0, n = this.vars.length; i < n; ++i)
                                        this.ps.addVariable(this.vars[i]);
                                    this.posn = this.ps.getPosn();
                                };
                                Block.prototype.compute_lm = function(v, u, postAction) {
                                    var _this = this;
                                    var dfdv = v.dfdv();
                                    v.visitNeighbours(u, function(c, next) {
                                        var _dfdv = _this.compute_lm(next, v, postAction);
                                        if (next === c.right) {
                                            dfdv += _dfdv * c.left.scale;
                                            c.lm = _dfdv;
                                        } else {
                                            dfdv += _dfdv * c.right.scale;
                                            c.lm = -_dfdv;
                                        }
                                        postAction(c);
                                    });
                                    return dfdv / v.scale;
                                };
                                Block.prototype.populateSplitBlock = function(v, prev) {
                                    var _this = this;
                                    v.visitNeighbours(prev, function(c, next) {
                                        next.offset = v.offset + (next === c.right ? c.gap : -c.gap);
                                        _this.addVariable(next);
                                        _this.populateSplitBlock(next, v);
                                    });
                                };
                                Block.prototype.traverse = function(visit, acc, v, prev) {
                                    var _this = this;
                                    if (v === void 0) { v = this.vars[0]; }
                                    if (prev === void 0) { prev = null; }
                                    v.visitNeighbours(prev, function(c, next) {
                                        acc.push(visit(c));
                                        _this.traverse(visit, acc, next, v);
                                    });
                                };
                                Block.prototype.findMinLM = function() {
                                    var m = null;
                                    this.compute_lm(this.vars[0], null, function(c) {
                                        if (!c.equality && (m === null || c.lm < m.lm))
                                            m = c;
                                    });
                                    return m;
                                };
                                Block.prototype.findMinLMBetween = function(lv, rv) {
                                    this.compute_lm(lv, null, function() {});
                                    var m = null;
                                    this.findPath(lv, null, rv, function(c, next) {
                                        if (!c.equality && c.right === next && (m === null || c.lm < m.lm))
                                            m = c;
                                    });
                                    return m;
                                };
                                Block.prototype.findPath = function(v, prev, to, visit) {
                                    var _this = this;
                                    var endFound = false;
                                    v.visitNeighbours(prev, function(c, next) {
                                        if (!endFound && (next === to || _this.findPath(next, v, to, visit))) {
                                            endFound = true;
                                            visit(c, next);
                                        }
                                    });
                                    return endFound;
                                };
                                Block.prototype.isActiveDirectedPathBetween = function(u, v) {
                                    if (u === v)
                                        return true;
                                    var i = u.cOut.length;
                                    while (i--) {
                                        var c = u.cOut[i];
                                        if (c.active && this.isActiveDirectedPathBetween(c.right, v))
                                            return true;
                                    }
                                    return false;
                                };
                                Block.split = function(c) {
                                    c.active = false;
                                    return [Block.createSplitBlock(c.left), Block.createSplitBlock(c.right)];
                                };
                                Block.createSplitBlock = function(startVar) {
                                    var b = new Block(startVar);
                                    b.populateSplitBlock(startVar, null);
                                    return b;
                                };
                                Block.prototype.splitBetween = function(vl, vr) {
                                    var c = this.findMinLMBetween(vl, vr);
                                    if (c !== null) {
                                        var bs = Block.split(c);
                                        return { constraint: c, lb: bs[0], rb: bs[1] };
                                    }
                                    return null;
                                };
                                Block.prototype.mergeAcross = function(b, c, dist) {
                                    c.active = true;
                                    for (var i = 0, n = b.vars.length; i < n; ++i) {
                                        var v = b.vars[i];
                                        v.offset += dist;
                                        this.addVariable(v);
                                    }
                                    this.posn = this.ps.getPosn();
                                };
                                Block.prototype.cost = function() {
                                    var sum = 0,
                                        i = this.vars.length;
                                    while (i--) {
                                        var v = this.vars[i],
                                            d = v.position() - v.desiredPosition;
                                        sum += d * d * v.weight;
                                    }
                                    return sum;
                                };
                                return Block;
                            }());
                            exports.Block = Block;
                            var Blocks = (function() {
                                function Blocks(vs) {
                                    this.vs = vs;
                                    var n = vs.length;
                                    this.list = new Array(n);
                                    while (n--) {
                                        var b = new Block(vs[n]);
                                        this.list[n] = b;
                                        b.blockInd = n;
                                    }
                                }
                                Blocks.prototype.cost = function() {
                                    var sum = 0,
                                        i = this.list.length;
                                    while (i--)
                                        sum += this.list[i].cost();
                                    return sum;
                                };
                                Blocks.prototype.insert = function(b) {
                                    b.blockInd = this.list.length;
                                    this.list.push(b);
                                };
                                Blocks.prototype.remove = function(b) {
                                    var last = this.list.length - 1;
                                    var swapBlock = this.list[last];
                                    this.list.length = last;
                                    if (b !== swapBlock) {
                                        this.list[b.blockInd] = swapBlock;
                                        swapBlock.blockInd = b.blockInd;
                                    }
                                };
                                Blocks.prototype.merge = function(c) {
                                    var l = c.left.block,
                                        r = c.right.block;
                                    var dist = c.right.offset - c.left.offset - c.gap;
                                    if (l.vars.length < r.vars.length) {
                                        r.mergeAcross(l, c, dist);
                                        this.remove(l);
                                    } else {
                                        l.mergeAcross(r, c, -dist);
                                        this.remove(r);
                                    }
                                };
                                Blocks.prototype.forEach = function(f) {
                                    this.list.forEach(f);
                                };
                                Blocks.prototype.updateBlockPositions = function() {
                                    this.list.forEach(function(b) { return b.updateWeightedPosition(); });
                                };
                                Blocks.prototype.split = function(inactive) {
                                    var _this = this;
                                    this.updateBlockPositions();
                                    this.list.forEach(function(b) {
                                        var v = b.findMinLM();
                                        if (v !== null && v.lm < Solver.LAGRANGIAN_TOLERANCE) {
                                            b = v.left.block;
                                            Block.split(v).forEach(function(nb) { return _this.insert(nb); });
                                            _this.remove(b);
                                            inactive.push(v);
                                        }
                                    });
                                };
                                return Blocks;
                            }());
                            exports.Blocks = Blocks;
                            var Solver = (function() {
                                function Solver(vs, cs) {
                                    this.vs = vs;
                                    this.cs = cs;
                                    this.vs = vs;
                                    vs.forEach(function(v) {
                                        v.cIn = [], v.cOut = [];
                                    });
                                    this.cs = cs;
                                    cs.forEach(function(c) {
                                        c.left.cOut.push(c);
                                        c.right.cIn.push(c);
                                    });
                                    this.inactive = cs.map(function(c) { c.active = false; return c; });
                                    this.bs = null;
                                }
                                Solver.prototype.cost = function() {
                                    return this.bs.cost();
                                };
                                Solver.prototype.setStartingPositions = function(ps) {
                                    this.inactive = this.cs.map(function(c) { c.active = false; return c; });
                                    this.bs = new Blocks(this.vs);
                                    this.bs.forEach(function(b, i) { return b.posn = ps[i]; });
                                };
                                Solver.prototype.setDesiredPositions = function(ps) {
                                    this.vs.forEach(function(v, i) { return v.desiredPosition = ps[i]; });
                                };
                                Solver.prototype.mostViolated = function() {
                                    var minSlack = Number.MAX_VALUE,
                                        v = null,
                                        l = this.inactive,
                                        n = l.length,
                                        deletePoint = n;
                                    for (var i = 0; i < n; ++i) {
                                        var c = l[i];
                                        if (c.unsatisfiable)
                                            continue;
                                        var slack = c.slack();
                                        if (c.equality || slack < minSlack) {
                                            minSlack = slack;
                                            v = c;
                                            deletePoint = i;
                                            if (c.equality)
                                                break;
                                        }
                                    }
                                    if (deletePoint !== n &&
                                        (minSlack < Solver.ZERO_UPPERBOUND && !v.active || v.equality)) {
                                        l[deletePoint] = l[n - 1];
                                        l.length = n - 1;
                                    }
                                    return v;
                                };
                                Solver.prototype.satisfy = function() {
                                    if (this.bs == null) {
                                        this.bs = new Blocks(this.vs);
                                    }
                                    this.bs.split(this.inactive);
                                    var v = null;
                                    while ((v = this.mostViolated()) && (v.equality || v.slack() < Solver.ZERO_UPPERBOUND && !v.active)) {
                                        var lb = v.left.block,
                                            rb = v.right.block;
                                        if (lb !== rb) {
                                            this.bs.merge(v);
                                        } else {
                                            if (lb.isActiveDirectedPathBetween(v.right, v.left)) {
                                                v.unsatisfiable = true;
                                                continue;
                                            }
                                            var split = lb.splitBetween(v.left, v.right);
                                            if (split !== null) {
                                                this.bs.insert(split.lb);
                                                this.bs.insert(split.rb);
                                                this.bs.remove(lb);
                                                this.inactive.push(split.constraint);
                                            } else {
                                                v.unsatisfiable = true;
                                                continue;
                                            }
                                            if (v.slack() >= 0) {
                                                this.inactive.push(v);
                                            } else {
                                                this.bs.merge(v);
                                            }
                                        }
                                    }
                                };
                                Solver.prototype.solve = function() {
                                    this.satisfy();
                                    var lastcost = Number.MAX_VALUE,
                                        cost = this.bs.cost();
                                    while (Math.abs(lastcost - cost) > 0.0001) {
                                        this.satisfy();
                                        lastcost = cost;
                                        cost = this.bs.cost();
                                    }
                                    return cost;
                                };
                                return Solver;
                            }());
                            Solver.LAGRANGIAN_TOLERANCE = -1e-4;
                            Solver.ZERO_UPPERBOUND = -1e-10;
                            exports.Solver = Solver;

                            function removeOverlapInOneDimension(spans, lowerBound, upperBound) {
                                var vs = spans.map(function(s) { return new Variable(s.desiredCenter); });
                                var cs = [];
                                var n = spans.length;
                                for (var i = 0; i < n - 1; i++) {
                                    var left = spans[i],
                                        right = spans[i + 1];
                                    cs.push(new Constraint(vs[i], vs[i + 1], (left.size + right.size) / 2));
                                }
                                var leftMost = vs[0],
                                    rightMost = vs[n - 1],
                                    leftMostSize = spans[0].size / 2,
                                    rightMostSize = spans[n - 1].size / 2;
                                var vLower = null,
                                    vUpper = null;
                                if (lowerBound) {
                                    vLower = new Variable(lowerBound, leftMost.weight * 1000);
                                    vs.push(vLower);
                                    cs.push(new Constraint(vLower, leftMost, leftMostSize));
                                }
                                if (upperBound) {
                                    vUpper = new Variable(upperBound, rightMost.weight * 1000);
                                    vs.push(vUpper);
                                    cs.push(new Constraint(rightMost, vUpper, rightMostSize));
                                }
                                var solver = new Solver(vs, cs);
                                solver.solve();
                                return {
                                    newCenters: vs.slice(0, spans.length).map(function(v) { return v.position(); }),
                                    lowerBound: vLower ? vLower.position() : leftMost.position() - leftMostSize,
                                    upperBound: vUpper ? vUpper.position() : rightMost.position() + rightMostSize
                                };
                            }
                            exports.removeOverlapInOneDimension = removeOverlapInOneDimension;

                        }, {}]
                    }, {}, [1])(1)
                });

                /***/
            }),
            /* 139 */
            /***/
            (function(module, exports) {

                module.exports = function(module) {
                    if (!module.webpackPolyfill) {
                        module.deprecate = function() {};
                        module.paths = [];
                        // module.parent = undefined by default
                        if (!module.children) module.children = [];
                        Object.defineProperty(module, "loaded", {
                            enumerable: true,
                            get: function() {
                                return module.l;
                            }
                        });
                        Object.defineProperty(module, "id", {
                            enumerable: true,
                            get: function() {
                                return module.i;
                            }
                        });
                        module.webpackPolyfill = 1;
                    }
                    return module;
                };


                /***/
            }),
            /* 140 */
            /***/
            (function(module, exports, __webpack_require__) {

                "use strict";


                Object.defineProperty(exports, "__esModule", {
                    value: true
                });
                exports.SentenTreeVis = exports.SentenTreeModel = exports.SentenTreeBuilder = exports.WordFilter = exports.tokenizer = undefined;

                var _WordFilter = __webpack_require__(24);

                Object.defineProperty(exports, 'WordFilter', {
                    enumerable: true,
                    get: function get() {
                        return _interopRequireDefault(_WordFilter).default;
                    }
                });

                var _SentenTreeBuilder = __webpack_require__(47);

                Object.defineProperty(exports, 'SentenTreeBuilder', {
                    enumerable: true,
                    get: function get() {
                        return _interopRequireDefault(_SentenTreeBuilder).default;
                    }
                });

                var _SentenTreeModel = __webpack_require__(23);

                Object.defineProperty(exports, 'SentenTreeModel', {
                    enumerable: true,
                    get: function get() {
                        return _interopRequireDefault(_SentenTreeModel).default;
                    }
                });

                var _SentenTreeVis = __webpack_require__(48);

                Object.defineProperty(exports, 'SentenTreeVis', {
                    enumerable: true,
                    get: function get() {
                        return _interopRequireDefault(_SentenTreeVis).default;
                    }
                });

                var _tokenize = __webpack_require__(25);

                var _tokenizer = _interopRequireWildcard(_tokenize);

                function _interopRequireWildcard(obj) {
                    if (obj && obj.__esModule) { return obj; } else {
                        var newObj = {};
                        if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } }
                        newObj.default = obj;
                        return newObj;
                    }
                }

                function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

                var tokenizer = exports.tokenizer = _tokenizer;

                /***/
            })
            /******/
        ]);
});