wwbsr/node_modules/highcharts/modules/sankey.src.js

/**
 * @license Highcharts JS v8.2.0 (2020-08-20)
 *
 * Sankey diagram module
 *
 * (c) 2010-2019 Torstein Honsi
 *
 * License: www.highcharts.com/license
 */
'use strict';
(function (factory) {
    if (typeof module === 'object' && module.exports) {
        factory['default'] = factory;
        module.exports = factory;
    } else if (typeof define === 'function' && define.amd) {
        define('highcharts/modules/sankey', ['highcharts'], function (Highcharts) {
            factory(Highcharts);
            factory.Highcharts = Highcharts;
            return factory;
        });
    } else {
        factory(typeof Highcharts !== 'undefined' ? Highcharts : undefined);
    }
}(function (Highcharts) {
    var _modules = Highcharts ? Highcharts._modules : {};
    function _registerModule(obj, path, args, fn) {
        if (!obj.hasOwnProperty(path)) {
            obj[path] = fn.apply(null, args);
        }
    }
    _registerModule(_modules, 'Mixins/Nodes.js', [_modules['Core/Globals.js'], _modules['Core/Series/Point.js'], _modules['Core/Utilities.js']], function (H, Point, U) {
        /* *
         *
         *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
         *
         * */
        var defined = U.defined,
            extend = U.extend,
            find = U.find,
            pick = U.pick;
        var NodesMixin = H.NodesMixin = {
                /* eslint-disable valid-jsdoc */
                /**
                 * Create a single node that holds information on incoming and outgoing
                 * links.
                 * @private
                 */
                createNode: function (id) {
                    /**
                     * @private
                     */
                    function findById(nodes,
            id) {
                        return find(nodes,
            function (node) {
                            return node.id === id;
                    });
                }
                var node = findById(this.nodes,
                    id),
                    PointClass = this.pointClass,
                    options;
                if (!node) {
                    options = this.options.nodes && findById(this.options.nodes, id);
                    node = (new PointClass()).init(this, extend({
                        className: 'highcharts-node',
                        isNode: true,
                        id: id,
                        y: 1 // Pass isNull test
                    }, options));
                    node.linksTo = [];
                    node.linksFrom = [];
                    node.formatPrefix = 'node';
                    node.name = node.name || node.options.id || ''; // for use in formats
                    // Mass is used in networkgraph:
                    node.mass = pick(
                    // Node:
                    node.options.mass, node.options.marker && node.options.marker.radius, 
                    // Series:
                    this.options.marker && this.options.marker.radius, 
                    // Default:
                    4);
                    /**
                     * Return the largest sum of either the incoming or outgoing links.
                     * @private
                     */
                    node.getSum = function () {
                        var sumTo = 0,
                            sumFrom = 0;
                        node.linksTo.forEach(function (link) {
                            sumTo += link.weight;
                        });
                        node.linksFrom.forEach(function (link) {
                            sumFrom += link.weight;
                        });
                        return Math.max(sumTo, sumFrom);
                    };
                    /**
                     * Get the offset in weight values of a point/link.
                     * @private
                     */
                    node.offset = function (point, coll) {
                        var offset = 0;
                        for (var i = 0; i < node[coll].length; i++) {
                            if (node[coll][i] === point) {
                                return offset;
                            }
                            offset += node[coll][i].weight;
                        }
                    };
                    // Return true if the node has a shape, otherwise all links are
                    // outgoing.
                    node.hasShape = function () {
                        var outgoing = 0;
                        node.linksTo.forEach(function (link) {
                            if (link.outgoing) {
                                outgoing++;
                            }
                        });
                        return (!node.linksTo.length ||
                            outgoing !== node.linksTo.length);
                    };
                    this.nodes.push(node);
                }
                return node;
            },
            /**
             * Extend generatePoints by adding the nodes, which are Point objects
             * but pushed to the this.nodes array.
             */
            generatePoints: function () {
                var chart = this.chart,
                    nodeLookup = {};
                H.Series.prototype.generatePoints.call(this);
                if (!this.nodes) {
                    this.nodes = []; // List of Point-like node items
                }
                this.colorCounter = 0;
                // Reset links from previous run
                this.nodes.forEach(function (node) {
                    node.linksFrom.length = 0;
                    node.linksTo.length = 0;
                    node.level = node.options.level;
                });
                // Create the node list and set up links
                this.points.forEach(function (point) {
                    if (defined(point.from)) {
                        if (!nodeLookup[point.from]) {
                            nodeLookup[point.from] = this.createNode(point.from);
                        }
                        nodeLookup[point.from].linksFrom.push(point);
                        point.fromNode = nodeLookup[point.from];
                        // Point color defaults to the fromNode's color
                        if (chart.styledMode) {
                            point.colorIndex = pick(point.options.colorIndex, nodeLookup[point.from].colorIndex);
                        }
                        else {
                            point.color =
                                point.options.color || nodeLookup[point.from].color;
                        }
                    }
                    if (defined(point.to)) {
                        if (!nodeLookup[point.to]) {
                            nodeLookup[point.to] = this.createNode(point.to);
                        }
                        nodeLookup[point.to].linksTo.push(point);
                        point.toNode = nodeLookup[point.to];
                    }
                    point.name = point.name || point.id; // for use in formats
                }, this);
                // Store lookup table for later use
                this.nodeLookup = nodeLookup;
            },
            // Destroy all nodes on setting new data
            setData: function () {
                if (this.nodes) {
                    this.nodes.forEach(function (node) {
                        node.destroy();
                    });
                    this.nodes.length = 0;
                }
                H.Series.prototype.setData.apply(this, arguments);
            },
            // Destroy alll nodes and links
            destroy: function () {
                // Nodes must also be destroyed (#8682, #9300)
                this.data = []
                    .concat(this.points || [], this.nodes);
                return H.Series.prototype.destroy.apply(this, arguments);
            },
            /**
             * When hovering node, highlight all connected links. When hovering a link,
             * highlight all connected nodes.
             */
            setNodeState: function (state) {
                var args = arguments,
                    others = this.isNode ? this.linksTo.concat(this.linksFrom) :
                        [this.fromNode,
                    this.toNode];
                if (state !== 'select') {
                    others.forEach(function (linkOrNode) {
                        if (linkOrNode && linkOrNode.series) {
                            Point.prototype.setState.apply(linkOrNode, args);
                            if (!linkOrNode.isNode) {
                                if (linkOrNode.fromNode.graphic) {
                                    Point.prototype.setState.apply(linkOrNode.fromNode, args);
                                }
                                if (linkOrNode.toNode && linkOrNode.toNode.graphic) {
                                    Point.prototype.setState.apply(linkOrNode.toNode, args);
                                }
                            }
                        }
                    });
                }
                Point.prototype.setState.apply(this, args);
            }
            /* eslint-enable valid-jsdoc */
        };

        return NodesMixin;
    });
    _registerModule(_modules, 'Mixins/TreeSeries.js', [_modules['Core/Color.js'], _modules['Core/Utilities.js']], function (Color, U) {
        /* *
         *
         *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
         *
         * */
        var extend = U.extend,
            isArray = U.isArray,
            isNumber = U.isNumber,
            isObject = U.isObject,
            merge = U.merge,
            pick = U.pick;
        var isBoolean = function (x) {
                return typeof x === 'boolean';
        }, isFn = function (x) {
            return typeof x === 'function';
        };
        /* eslint-disable valid-jsdoc */
        /**
         * @todo Combine buildTree and buildNode with setTreeValues
         * @todo Remove logic from Treemap and make it utilize this mixin.
         * @private
         */
        var setTreeValues = function setTreeValues(tree,
            options) {
                var before = options.before,
            idRoot = options.idRoot,
            mapIdToNode = options.mapIdToNode,
            nodeRoot = mapIdToNode[idRoot],
            levelIsConstant = (isBoolean(options.levelIsConstant) ?
                    options.levelIsConstant :
                    true),
            points = options.points,
            point = points[tree.i],
            optionsPoint = point && point.options || {},
            childrenTotal = 0,
            children = [],
            value;
            extend(tree, {
                levelDynamic: tree.level - (levelIsConstant ? 0 : nodeRoot.level),
                name: pick(point && point.name, ''),
                visible: (idRoot === tree.id ||
                    (isBoolean(options.visible) ? options.visible : false))
            });
            if (isFn(before)) {
                tree = before(tree, options);
            }
            // First give the children some values
            tree.children.forEach(function (child, i) {
                var newOptions = extend({},
                    options);
                extend(newOptions, {
                    index: i,
                    siblings: tree.children.length,
                    visible: tree.visible
                });
                child = setTreeValues(child, newOptions);
                children.push(child);
                if (child.visible) {
                    childrenTotal += child.val;
                }
            });
            tree.visible = childrenTotal > 0 || tree.visible;
            // Set the values
            value = pick(optionsPoint.value, childrenTotal);
            extend(tree, {
                children: children,
                childrenTotal: childrenTotal,
                isLeaf: tree.visible && !childrenTotal,
                val: value
            });
            return tree;
        };
        /**
         * @private
         */
        var getColor = function getColor(node,
            options) {
                var index = options.index,
            mapOptionsToLevel = options.mapOptionsToLevel,
            parentColor = options.parentColor,
            parentColorIndex = options.parentColorIndex,
            series = options.series,
            colors = options.colors,
            siblings = options.siblings,
            points = series.points,
            getColorByPoint,
            chartOptionsChart = series.chart.options.chart,
            point,
            level,
            colorByPoint,
            colorIndexByPoint,
            color,
            colorIndex;
            /**
             * @private
             */
            function variation(color) {
                var colorVariation = level && level.colorVariation;
                if (colorVariation) {
                    if (colorVariation.key === 'brightness') {
                        return Color.parse(color).brighten(colorVariation.to * (index / siblings)).get();
                    }
                }
                return color;
            }
            if (node) {
                point = points[node.i];
                level = mapOptionsToLevel[node.level] || {};
                getColorByPoint = point && level.colorByPoint;
                if (getColorByPoint) {
                    colorIndexByPoint = point.index % (colors ?
                        colors.length :
                        chartOptionsChart.colorCount);
                    colorByPoint = colors && colors[colorIndexByPoint];
                }
                // Select either point color, level color or inherited color.
                if (!series.chart.styledMode) {
                    color = pick(point && point.options.color, level && level.color, colorByPoint, parentColor && variation(parentColor), series.color);
                }
                colorIndex = pick(point && point.options.colorIndex, level && level.colorIndex, colorIndexByPoint, parentColorIndex, options.colorIndex);
            }
            return {
                color: color,
                colorIndex: colorIndex
            };
        };
        /**
         * Creates a map from level number to its given options.
         *
         * @private
         * @function getLevelOptions
         * @param {object} params
         *        Object containing parameters.
         *        - `defaults` Object containing default options. The default options
         *           are merged with the userOptions to get the final options for a
         *           specific level.
         *        - `from` The lowest level number.
         *        - `levels` User options from series.levels.
         *        - `to` The highest level number.
         * @return {Highcharts.Dictionary<object>|null}
         *         Returns a map from level number to its given options.
         */
        var getLevelOptions = function getLevelOptions(params) {
                var result = null,
            defaults,
            converted,
            i,
            from,
            to,
            levels;
            if (isObject(params)) {
                result = {};
                from = isNumber(params.from) ? params.from : 1;
                levels = params.levels;
                converted = {};
                defaults = isObject(params.defaults) ? params.defaults : {};
                if (isArray(levels)) {
                    converted = levels.reduce(function (obj, item) {
                        var level,
                            levelIsConstant,
                            options;
                        if (isObject(item) && isNumber(item.level)) {
                            options = merge({}, item);
                            levelIsConstant = (isBoolean(options.levelIsConstant) ?
                                options.levelIsConstant :
                                defaults.levelIsConstant);
                            // Delete redundant properties.
                            delete options.levelIsConstant;
                            delete options.level;
                            // Calculate which level these options apply to.
                            level = item.level + (levelIsConstant ? 0 : from - 1);
                            if (isObject(obj[level])) {
                                extend(obj[level], options);
                            }
                            else {
                                obj[level] = options;
                            }
                        }
                        return obj;
                    }, {});
                }
                to = isNumber(params.to) ? params.to : 1;
                for (i = 0; i <= to; i++) {
                    result[i] = merge({}, defaults, isObject(converted[i]) ? converted[i] : {});
                }
            }
            return result;
        };
        /**
         * Update the rootId property on the series. Also makes sure that it is
         * accessible to exporting.
         *
         * @private
         * @function updateRootId
         *
         * @param {object} series
         *        The series to operate on.
         *
         * @return {string}
         *         Returns the resulting rootId after update.
         */
        var updateRootId = function (series) {
                var rootId,
            options;
            if (isObject(series)) {
                // Get the series options.
                options = isObject(series.options) ? series.options : {};
                // Calculate the rootId.
                rootId = pick(series.rootNode, options.rootId, '');
                // Set rootId on series.userOptions to pick it up in exporting.
                if (isObject(series.userOptions)) {
                    series.userOptions.rootId = rootId;
                }
                // Set rootId on series to pick it up on next update.
                series.rootNode = rootId;
            }
            return rootId;
        };
        var result = {
                getColor: getColor,
                getLevelOptions: getLevelOptions,
                setTreeValues: setTreeValues,
                updateRootId: updateRootId
            };

        return result;
    });
    _registerModule(_modules, 'Series/SankeySeries.js', [_modules['Core/Globals.js'], _modules['Mixins/Nodes.js'], _modules['Core/Color.js'], _modules['Core/Series/Point.js'], _modules['Core/Utilities.js'], _modules['Mixins/TreeSeries.js']], function (H, NodesMixin, Color, Point, U, TreeSeriesMixin) {
        /* *
         *
         *  Sankey diagram module
         *
         *  (c) 2010-2020 Torstein Honsi
         *
         *  License: www.highcharts.com/license
         *
         *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
         *
         * */
        /**
         * A node in a sankey diagram.
         *
         * @interface Highcharts.SankeyNodeObject
         * @extends Highcharts.Point
         * @product highcharts
         */ /**
        * The color of the auto generated node.
        *
        * @name Highcharts.SankeyNodeObject#color
        * @type {Highcharts.ColorString|Highcharts.GradientColorObject|Highcharts.PatternObject}
        */ /**
        * The color index of the auto generated node, especially for use in styled
        * mode.
        *
        * @name Highcharts.SankeyNodeObject#colorIndex
        * @type {number}
        */ /**
        * An optional column index of where to place the node. The default behaviour is
        * to place it next to the preceding node.
        *
        * @see {@link https://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/plotoptions/sankey-node-column/|Highcharts-Demo:}
        *      Specified node column
        *
        * @name Highcharts.SankeyNodeObject#column
        * @type {number}
        * @since 6.0.5
        */ /**
        * The id of the auto-generated node, refering to the `from` or `to` setting of
        * the link.
        *
        * @name Highcharts.SankeyNodeObject#id
        * @type {string}
        */ /**
        * The name to display for the node in data labels and tooltips. Use this when
        * the name is different from the `id`. Where the id must be unique for each
        * node, this is not necessary for the name.
        *
        * @see {@link https://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/css/sankey/|Highcharts-Demo:}
        *         Sankey diagram with node options
        *
        * @name Highcharts.SankeyNodeObject#name
        * @type {string}
        * @product highcharts
        */ /**
        * The vertical offset of a node in terms of weight. Positive values shift the
        * node downwards, negative shift it upwards.
        *
        * @see {@link https://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/plotoptions/sankey-node-column/|Highcharts-Demo:}
        *         Specified node offset
        *
        * @name Highcharts.SankeyNodeObject#offset
        * @type {number}
        * @default 0
        * @since 6.0.5
        */
        /**
         * Formatter callback function.
         *
         * @callback Highcharts.SeriesSankeyDataLabelsFormatterCallbackFunction
         *
         * @param {Highcharts.SeriesSankeyDataLabelsFormatterContextObject|Highcharts.PointLabelObject} this
         *        Data label context to format
         *
         * @return {string|undefined}
         *         Formatted data label text
         */
        /**
         * Context for the node formatter function.
         *
         * @interface Highcharts.SeriesSankeyDataLabelsFormatterContextObject
         * @extends Highcharts.PointLabelObject
         */ /**
        * The node object. The node name, if defined, is available through
        * `this.point.name`.
        * @name Highcharts.SeriesSankeyDataLabelsFormatterContextObject#point
        * @type {Highcharts.SankeyNodeObject}
        */
        var defined = U.defined,
            find = U.find,
            isObject = U.isObject,
            merge = U.merge,
            pick = U.pick,
            relativeLength = U.relativeLength,
            seriesType = U.seriesType,
            stableSort = U.stableSort;
        var getLevelOptions = TreeSeriesMixin.getLevelOptions;
        // eslint-disable-next-line valid-jsdoc
        /**
         * @private
         */
        var getDLOptions = function getDLOptions(params) {
                var optionsPoint = (isObject(params.optionsPoint) ?
                    params.optionsPoint.dataLabels :
                    {}),
            optionsLevel = (isObject(params.level) ?
                    params.level.dataLabels :
                    {}),
            options = merge({
                    style: {}
                },
            optionsLevel,
            optionsPoint);
            return options;
        };
        /**
         * @private
         * @class
         * @name Highcharts.seriesTypes.sankey
         *
         * @augments Highcharts.Series
         */
        seriesType('sankey', 'column', 
        /**
         * A sankey diagram is a type of flow diagram, in which the width of the
         * link between two nodes is shown proportionally to the flow quantity.
         *
         * @sample highcharts/demo/sankey-diagram/
         *         Sankey diagram
         * @sample highcharts/plotoptions/sankey-inverted/
         *         Inverted sankey diagram
         * @sample highcharts/plotoptions/sankey-outgoing
         *         Sankey diagram with outgoing links
         *
         * @extends      plotOptions.column
         * @since        6.0.0
         * @product      highcharts
         * @excluding    animationLimit, boostThreshold, borderRadius,
         *               crisp, cropThreshold, colorAxis, colorKey, depth, dragDrop,
         *               edgeColor, edgeWidth, findNearestPointBy, grouping,
         *               groupPadding, groupZPadding, maxPointWidth, negativeColor,
         *               pointInterval, pointIntervalUnit, pointPadding,
         *               pointPlacement, pointRange, pointStart, pointWidth,
         *               shadow, softThreshold, stacking, threshold, zoneAxis,
         *               zones, minPointLength, dataSorting, boostBlending
         * @requires     modules/sankey
         * @optionparent plotOptions.sankey
         */
        {
            borderWidth: 0,
            colorByPoint: true,
            /**
             * Higher numbers makes the links in a sankey diagram or dependency
             * wheelrender more curved. A `curveFactor` of 0 makes the lines
             * straight.
             *
             * @private
             */
            curveFactor: 0.33,
            /**
             * Options for the data labels appearing on top of the nodes and links.
             * For sankey charts, data labels are visible for the nodes by default,
             * but hidden for links. This is controlled by modifying the
             * `nodeFormat`, and the `format` that applies to links and is an empty
             * string by default.
             *
             * @declare Highcharts.SeriesSankeyDataLabelsOptionsObject
             *
             * @private
             */
            dataLabels: {
                enabled: true,
                backgroundColor: 'none',
                crop: false,
                /**
                 * The
                 * [format string](https://www.highcharts.com/docs/chart-concepts/labels-and-string-formatting)
                 * specifying what to show for _nodes_ in the sankey diagram. By
                 * default the `nodeFormatter` returns `{point.name}`.
                 *
                 * @sample highcharts/plotoptions/sankey-link-datalabels/
                 *         Node and link data labels
                 *
                 * @type {string}
                 */
                nodeFormat: void 0,
                // eslint-disable-next-line valid-jsdoc
                /**
                 * Callback to format data labels for _nodes_ in the sankey diagram.
                 * The `nodeFormat` option takes precedence over the
                 * `nodeFormatter`.
                 *
                 * @type  {Highcharts.SeriesSankeyDataLabelsFormatterCallbackFunction}
                 * @since 6.0.2
                 */
                nodeFormatter: function () {
                    return this.point.name;
                },
                format: void 0,
                // eslint-disable-next-line valid-jsdoc
                /**
                 * @type {Highcharts.SeriesSankeyDataLabelsFormatterCallbackFunction}
                 */
                formatter: function () {
                    return;
                },
                inside: true
            },
            /**
             * @ignore-option
             *
             * @private
             */
            inactiveOtherPoints: true,
            /**
             * Set options on specific levels. Takes precedence over series options,
             * but not node and link options.
             *
             * @sample highcharts/demo/sunburst
             *         Sunburst chart
             *
             * @type      {Array<*>}
             * @since     7.1.0
             * @apioption plotOptions.sankey.levels
             */
            /**
             * Can set `borderColor` on all nodes which lay on the same level.
             *
             * @type      {Highcharts.ColorString}
             * @apioption plotOptions.sankey.levels.borderColor
             */
            /**
             * Can set `borderWidth` on all nodes which lay on the same level.
             *
             * @type      {number}
             * @apioption plotOptions.sankey.levels.borderWidth
             */
            /**
             * Can set `color` on all nodes which lay on the same level.
             *
             * @type      {Highcharts.ColorString|Highcharts.GradientColorObject|Highcharts.PatternObject}
             * @apioption plotOptions.sankey.levels.color
             */
            /**
             * Can set `colorByPoint` on all nodes which lay on the same level.
             *
             * @type      {boolean}
             * @default   true
             * @apioption plotOptions.sankey.levels.colorByPoint
             */
            /**
             * Can set `dataLabels` on all points which lay on the same level.
             *
             * @extends   plotOptions.sankey.dataLabels
             * @apioption plotOptions.sankey.levels.dataLabels
             */
            /**
             * Decides which level takes effect from the options set in the levels
             * object.
             *
             * @type      {number}
             * @apioption plotOptions.sankey.levels.level
             */
            /**
             * Can set `linkOpacity` on all points which lay on the same level.
             *
             * @type      {number}
             * @default   0.5
             * @apioption plotOptions.sankey.levels.linkOpacity
             */
            /**
             * Can set `states` on all nodes and points which lay on the same level.
             *
             * @extends   plotOptions.sankey.states
             * @apioption plotOptions.sankey.levels.states
             */
            /**
             * Opacity for the links between nodes in the sankey diagram.
             *
             * @private
             */
            linkOpacity: 0.5,
            /**
             * The minimal width for a line of a sankey. By default,
             * 0 values are not shown.
             *
             * @sample highcharts/plotoptions/sankey-minlinkwidth
             *         Sankey diagram with minimal link height
             *
             * @type      {number}
             * @since     7.1.3
             * @default   0
             * @apioption plotOptions.sankey.minLinkWidth
             *
             * @private
             */
            minLinkWidth: 0,
            /**
             * The pixel width of each node in a sankey diagram or dependency wheel,
             * or the height in case the chart is inverted.
             *
             * @private
             */
            nodeWidth: 20,
            /**
             * The padding between nodes in a sankey diagram or dependency wheel, in
             * pixels.
             *
             * If the number of nodes is so great that it is possible to lay them
             * out within the plot area with the given `nodePadding`, they will be
             * rendered with a smaller padding as a strategy to avoid overflow.
             *
             * @private
             */
            nodePadding: 10,
            showInLegend: false,
            states: {
                hover: {
                    /**
                     * Opacity for the links between nodes in the sankey diagram in
                     * hover mode.
                     */
                    linkOpacity: 1
                },
                /**
                 * The opposite state of a hover for a single point node/link.
                 *
                 * @declare Highcharts.SeriesStatesInactiveOptionsObject
                 */
                inactive: {
                    /**
                     * Opacity for the links between nodes in the sankey diagram in
                     * inactive mode.
                     */
                    linkOpacity: 0.1,
                    /**
                     * Opacity of inactive markers.
                     *
                     * @type      {number}
                     * @apioption plotOptions.series.states.inactive.opacity
                     */
                    opacity: 0.1,
                    /**
                     * Animation when not hovering over the marker.
                     *
                     * @type      {boolean|Partial<Highcharts.AnimationOptionsObject>}
                     * @apioption plotOptions.series.states.inactive.animation
                     */
                    animation: {
                        /** @internal */
                        duration: 50
                    }
                }
            },
            tooltip: {
                /**
                 * A callback for defining the format for _nodes_ in the chart's
                 * tooltip, as opposed to links.
                 *
                 * @type      {Highcharts.FormatterCallbackFunction<Highcharts.SankeyNodeObject>}
                 * @since     6.0.2
                 * @apioption plotOptions.sankey.tooltip.nodeFormatter
                 */
                /**
                 * Whether the tooltip should follow the pointer or stay fixed on
                 * the item.
                 */
                followPointer: true,
                headerFormat: '<span style="font-size: 10px">{series.name}</span><br/>',
                pointFormat: '{point.fromNode.name} \u2192 {point.toNode.name}: <b>{point.weight}</b><br/>',
                /**
                 * The
                 * [format string](https://www.highcharts.com/docs/chart-concepts/labels-and-string-formatting)
                 * specifying what to show for _nodes_ in tooltip of a diagram
                 * series, as opposed to links.
                 */
                nodeFormat: '{point.name}: <b>{point.sum}</b><br/>'
            }
        }, {
            isCartesian: false,
            invertable: true,
            forceDL: true,
            orderNodes: true,
            pointArrayMap: ['from', 'to'],
            // Create a single node that holds information on incoming and outgoing
            // links.
            createNode: NodesMixin.createNode,
            searchPoint: H.noop,
            setData: NodesMixin.setData,
            destroy: NodesMixin.destroy,
            /* eslint-disable valid-jsdoc */
            /**
             * Overridable function to get node padding, overridden in dependency
             * wheel series type.
             * @private
             */
            getNodePadding: function () {
                var nodePadding = this.options.nodePadding || 0;
                // If the number of columns is so great that they will overflow with
                // the given nodePadding, we sacrifice the padding in order to
                // render all nodes within the plot area (#11917).
                if (this.nodeColumns) {
                    var maxLength = this.nodeColumns.reduce(function (acc,
                        col) { return Math.max(acc,
                        col.length); }, 0);
                    if (maxLength * nodePadding > this.chart.plotSizeY) {
                        nodePadding = this.chart.plotSizeY / maxLength;
                    }
                }
                return nodePadding;
            },
            /**
             * Create a node column.
             * @private
             */
            createNodeColumn: function () {
                var series = this,
                    chart = this.chart,
                    column = [];
                column.sum = function () {
                    return this.reduce(function (sum, node) {
                        return sum + node.getSum();
                    }, 0);
                };
                // Get the offset in pixels of a node inside the column.
                column.offset = function (node, factor) {
                    var offset = 0,
                        totalNodeOffset,
                        nodePadding = series.nodePadding;
                    for (var i = 0; i < column.length; i++) {
                        var sum = column[i].getSum();
                        var height = Math.max(sum * factor,
                            series.options.minLinkWidth);
                        if (sum) {
                            totalNodeOffset = height + nodePadding;
                        }
                        else {
                            // If node sum equals 0 nodePadding is missed #12453
                            totalNodeOffset = 0;
                        }
                        if (column[i] === node) {
                            return {
                                relativeTop: offset + relativeLength(node.options.offset || 0, totalNodeOffset)
                            };
                        }
                        offset += totalNodeOffset;
                    }
                };
                // Get the top position of the column in pixels.
                column.top = function (factor) {
                    var nodePadding = series.nodePadding;
                    var height = this.reduce(function (height,
                        node) {
                            if (height > 0) {
                                height += nodePadding;
                        }
                        var nodeHeight = Math.max(node.getSum() * factor,
                            series.options.minLinkWidth);
                        height += nodeHeight;
                        return height;
                    }, 0);
                    return (chart.plotSizeY - height) / 2;
                };
                return column;
            },
            /**
             * Create node columns by analyzing the nodes and the relations between
             * incoming and outgoing links.
             * @private
             */
            createNodeColumns: function () {
                var columns = [];
                this.nodes.forEach(function (node) {
                    var fromColumn = -1,
                        fromNode,
                        i,
                        point;
                    if (!defined(node.options.column)) {
                        // No links to this node, place it left
                        if (node.linksTo.length === 0) {
                            node.column = 0;
                            // There are incoming links, place it to the right of the
                            // highest order column that links to this one.
                        }
                        else {
                            for (i = 0; i < node.linksTo.length; i++) {
                                point = node.linksTo[0];
                                if (point.fromNode.column > fromColumn) {
                                    fromNode = point.fromNode;
                                    fromColumn = fromNode.column;
                                }
                            }
                            node.column = fromColumn + 1;
                            // Hanging layout for organization chart
                            if (fromNode &&
                                fromNode.options.layout === 'hanging') {
                                node.hangsFrom = fromNode;
                                i = -1; // Reuse existing variable i
                                find(fromNode.linksFrom, function (link, index) {
                                    var found = link.toNode === node;
                                    if (found) {
                                        i = index;
                                    }
                                    return found;
                                });
                                node.column += i;
                            }
                        }
                    }
                    if (!columns[node.column]) {
                        columns[node.column] = this.createNodeColumn();
                    }
                    columns[node.column].push(node);
                }, this);
                // Fill in empty columns (#8865)
                for (var i = 0; i < columns.length; i++) {
                    if (typeof columns[i] === 'undefined') {
                        columns[i] = this.createNodeColumn();
                    }
                }
                return columns;
            },
            /**
             * Define hasData function for non-cartesian series.
             * @private
             * @return {boolean}
             *         Returns true if the series has points at all.
             */
            hasData: function () {
                return !!this.processedXData.length; // != 0
            },
            /**
             * Return the presentational attributes.
             * @private
             */
            pointAttribs: function (point, state) {
                var series = this, level = point.isNode ? point.level : point.fromNode.level, levelOptions = series.mapOptionsToLevel[level || 0] || {}, options = point.options, stateOptions = (levelOptions.states && levelOptions.states[state]) || {}, values = [
                        'colorByPoint', 'borderColor', 'borderWidth', 'linkOpacity'
                    ].reduce(function (obj, key) {
                        obj[key] = pick(stateOptions[key], options[key], levelOptions[key], series.options[key]);
                    return obj;
                }, {}), color = pick(stateOptions.color, options.color, values.colorByPoint ? point.color : levelOptions.color);
                // Node attributes
                if (point.isNode) {
                    return {
                        fill: color,
                        stroke: values.borderColor,
                        'stroke-width': values.borderWidth
                    };
                }
                // Link attributes
                return {
                    fill: Color.parse(color).setOpacity(values.linkOpacity).get()
                };
            },
            /**
             * Extend generatePoints by adding the nodes, which are Point objects
             * but pushed to the this.nodes array.
             * @private
             */
            generatePoints: function () {
                NodesMixin.generatePoints.apply(this, arguments);
                /**
                 * Order the nodes, starting with the root node(s). (#9818)
                 * @private
                 */
                function order(node, level) {
                    // Prevents circular recursion:
                    if (typeof node.level === 'undefined') {
                        node.level = level;
                        node.linksFrom.forEach(function (link) {
                            if (link.toNode) {
                                order(link.toNode, level + 1);
                            }
                        });
                    }
                }
                if (this.orderNodes) {
                    this.nodes
                        // Identify the root node(s)
                        .filter(function (node) {
                        return node.linksTo.length === 0;
                    })
                        // Start by the root node(s) and recursively set the level
                        // on all following nodes.
                        .forEach(function (node) {
                        order(node, 0);
                    });
                    stableSort(this.nodes, function (a, b) {
                        return a.level - b.level;
                    });
                }
            },
            /**
             * Run translation operations for one node.
             * @private
             */
            translateNode: function (node, column) {
                var translationFactor = this.translationFactor,
                    chart = this.chart,
                    options = this.options,
                    sum = node.getSum(),
                    height = Math.max(Math.round(sum * translationFactor),
                    this.options.minLinkWidth),
                    crisp = Math.round(options.borderWidth) % 2 / 2,
                    nodeOffset = column.offset(node,
                    translationFactor),
                    fromNodeTop = Math.floor(pick(nodeOffset.absoluteTop, (column.top(translationFactor) +
                        nodeOffset.relativeTop))) + crisp,
                    left = Math.floor(this.colDistance * node.column +
                        options.borderWidth / 2) + crisp,
                    nodeLeft = chart.inverted ?
                        chart.plotSizeX - left :
                        left,
                    nodeWidth = Math.round(this.nodeWidth);
                node.sum = sum;
                // If node sum is 0, don't render the rect #12453
                if (sum) {
                    // Draw the node
                    node.shapeType = 'rect';
                    node.nodeX = nodeLeft;
                    node.nodeY = fromNodeTop;
                    if (!chart.inverted) {
                        node.shapeArgs = {
                            x: nodeLeft,
                            y: fromNodeTop,
                            width: node.options.width || options.width || nodeWidth,
                            height: node.options.height || options.height || height
                        };
                    }
                    else {
                        node.shapeArgs = {
                            x: nodeLeft - nodeWidth,
                            y: chart.plotSizeY - fromNodeTop - height,
                            width: node.options.height || options.height || nodeWidth,
                            height: node.options.width || options.width || height
                        };
                    }
                    node.shapeArgs.display = node.hasShape() ? '' : 'none';
                    // Calculate data label options for the point
                    node.dlOptions = getDLOptions({
                        level: this.mapOptionsToLevel[node.level],
                        optionsPoint: node.options
                    });
                    // Pass test in drawPoints
                    node.plotY = 1;
                    // Set the anchor position for tooltips
                    node.tooltipPos = chart.inverted ? [
                        chart.plotSizeY - node.shapeArgs.y - node.shapeArgs.height / 2,
                        chart.plotSizeX - node.shapeArgs.x - node.shapeArgs.width / 2
                    ] : [
                        node.shapeArgs.x + node.shapeArgs.width / 2,
                        node.shapeArgs.y + node.shapeArgs.height / 2
                    ];
                }
                else {
                    node.dlOptions = {
                        enabled: false
                    };
                }
            },
            /**
             * Run translation operations for one link.
             * @private
             */
            translateLink: function (point) {
                var getY = function (node,
                    fromOrTo) {
                        var _a;
                    var linkTop = (node.offset(point,
                        fromOrTo) *
                            translationFactor);
                    var y = Math.min(node.nodeY + linkTop, 
                        // Prevent links from spilling below the node (#12014)
                        node.nodeY + ((_a = node.shapeArgs) === null || _a === void 0 ? void 0 : _a.height) - linkHeight);
                    return y;
                };
                var fromNode = point.fromNode, toNode = point.toNode, chart = this.chart, translationFactor = this.translationFactor, linkHeight = Math.max(point.weight * translationFactor, this.options.minLinkWidth), options = this.options, curvy = ((chart.inverted ? -this.colDistance : this.colDistance) *
                        options.curveFactor), fromY = getY(fromNode, 'linksFrom'), toY = getY(toNode, 'linksTo'), nodeLeft = fromNode.nodeX, nodeW = this.nodeWidth, right = toNode.column * this.colDistance, outgoing = point.outgoing, straight = right > nodeLeft + nodeW;
                if (chart.inverted) {
                    fromY = chart.plotSizeY - fromY;
                    toY = (chart.plotSizeY || 0) - toY;
                    right = chart.plotSizeX - right;
                    nodeW = -nodeW;
                    linkHeight = -linkHeight;
                    straight = nodeLeft > right;
                }
                point.shapeType = 'path';
                point.linkBase = [
                    fromY,
                    fromY + linkHeight,
                    toY,
                    toY + linkHeight
                ];
                // Links going from left to right
                if (straight && typeof toY === 'number') {
                    point.shapeArgs = {
                        d: [
                            ['M', nodeLeft + nodeW, fromY],
                            [
                                'C',
                                nodeLeft + nodeW + curvy,
                                fromY,
                                right - curvy,
                                toY,
                                right,
                                toY
                            ],
                            ['L', right + (outgoing ? nodeW : 0), toY + linkHeight / 2],
                            ['L', right, toY + linkHeight],
                            [
                                'C',
                                right - curvy,
                                toY + linkHeight,
                                nodeLeft + nodeW + curvy,
                                fromY + linkHeight,
                                nodeLeft + nodeW, fromY + linkHeight
                            ],
                            ['Z']
                        ]
                    };
                    // Experimental: Circular links pointing backwards. In
                    // v6.1.0 this breaks the rendering completely, so even
                    // this experimental rendering is an improvement. #8218.
                    // @todo
                    // - Make room for the link in the layout
                    // - Automatically determine if the link should go up or
                    //   down.
                }
                else if (typeof toY === 'number') {
                    var bend = 20,
                        vDist = chart.plotHeight - fromY - linkHeight,
                        x1 = right - bend - linkHeight,
                        x2 = right - bend,
                        x3 = right,
                        x4 = nodeLeft + nodeW,
                        x5 = x4 + bend,
                        x6 = x5 + linkHeight,
                        fy1 = fromY,
                        fy2 = fromY + linkHeight,
                        fy3 = fy2 + bend,
                        y4 = fy3 + vDist,
                        y5 = y4 + bend,
                        y6 = y5 + linkHeight,
                        ty1 = toY,
                        ty2 = ty1 + linkHeight,
                        ty3 = ty2 + bend,
                        cfy1 = fy2 - linkHeight * 0.7,
                        cy2 = y5 + linkHeight * 0.7,
                        cty1 = ty2 - linkHeight * 0.7,
                        cx1 = x3 - linkHeight * 0.7,
                        cx2 = x4 + linkHeight * 0.7;
                    point.shapeArgs = {
                        d: [
                            ['M', x4, fy1],
                            ['C', cx2, fy1, x6, cfy1, x6, fy3],
                            ['L', x6, y4],
                            ['C', x6, cy2, cx2, y6, x4, y6],
                            ['L', x3, y6],
                            ['C', cx1, y6, x1, cy2, x1, y4],
                            ['L', x1, ty3],
                            ['C', x1, cty1, cx1, ty1, x3, ty1],
                            ['L', x3, ty2],
                            ['C', x2, ty2, x2, ty2, x2, ty3],
                            ['L', x2, y4],
                            ['C', x2, y5, x2, y5, x3, y5],
                            ['L', x4, y5],
                            ['C', x5, y5, x5, y5, x5, y4],
                            ['L', x5, fy3],
                            ['C', x5, fy2, x5, fy2, x4, fy2],
                            ['Z']
                        ]
                    };
                }
                // Place data labels in the middle
                point.dlBox = {
                    x: nodeLeft + (right - nodeLeft + nodeW) / 2,
                    y: fromY + (toY - fromY) / 2,
                    height: linkHeight,
                    width: 0
                };
                // And set the tooltip anchor in the middle
                point.tooltipPos = chart.inverted ? [
                    chart.plotSizeY - point.dlBox.y - linkHeight / 2,
                    chart.plotSizeX - point.dlBox.x
                ] : [
                    point.dlBox.x,
                    point.dlBox.y + linkHeight / 2
                ];
                // Pass test in drawPoints
                point.y = point.plotY = 1;
                if (!point.color) {
                    point.color = fromNode.color;
                }
            },
            /**
             * Run pre-translation by generating the nodeColumns.
             * @private
             */
            translate: function () {
                var _this = this;
                // Get the translation factor needed for each column to fill up the
                // plot height
                var getColumnTranslationFactor = function (column) {
                        var nodes = column.slice();
                    var minLinkWidth = _this.options.minLinkWidth || 0;
                    var exceedsMinLinkWidth;
                    var factor = 0;
                    var i;
                    var remainingHeight = chart.plotSizeY -
                            options.borderWidth - (column.length - 1) * series.nodePadding;
                    // Because the minLinkWidth option doesn't obey the direct
                    // translation, we need to run translation iteratively, check
                    // node heights, remove those nodes affected by minLinkWidth,
                    // check again, etc.
                    while (column.length) {
                        factor = remainingHeight / column.sum();
                        exceedsMinLinkWidth = false;
                        i = column.length;
                        while (i--) {
                            if (column[i].getSum() * factor < minLinkWidth) {
                                column.splice(i, 1);
                                remainingHeight -= minLinkWidth;
                                exceedsMinLinkWidth = true;
                            }
                        }
                        if (!exceedsMinLinkWidth) {
                            break;
                        }
                    }
                    // Re-insert original nodes
                    column.length = 0;
                    nodes.forEach(function (node) { return column.push(node); });
                    return factor;
                };
                if (!this.processedXData) {
                    this.processData();
                }
                this.generatePoints();
                this.nodeColumns = this.createNodeColumns();
                this.nodeWidth = relativeLength(this.options.nodeWidth, this.chart.plotSizeX);
                var series = this,
                    chart = this.chart,
                    options = this.options,
                    nodeWidth = this.nodeWidth,
                    nodeColumns = this.nodeColumns;
                this.nodePadding = this.getNodePadding();
                // Find out how much space is needed. Base it on the translation
                // factor of the most spaceous column.
                this.translationFactor = nodeColumns.reduce(function (translationFactor, column) { return Math.min(translationFactor, getColumnTranslationFactor(column)); }, Infinity);
                this.colDistance =
                    (chart.plotSizeX - nodeWidth -
                        options.borderWidth) / Math.max(1, nodeColumns.length - 1);
                // Calculate level options used in sankey and organization
                series.mapOptionsToLevel = getLevelOptions({
                    // NOTE: if support for allowTraversingTree is added, then from
                    // should be the level of the root node.
                    from: 1,
                    levels: options.levels,
                    to: nodeColumns.length - 1,
                    defaults: {
                        borderColor: options.borderColor,
                        borderRadius: options.borderRadius,
                        borderWidth: options.borderWidth,
                        color: series.color,
                        colorByPoint: options.colorByPoint,
                        // NOTE: if support for allowTraversingTree is added, then
                        // levelIsConstant should be optional.
                        levelIsConstant: true,
                        linkColor: options.linkColor,
                        linkLineWidth: options.linkLineWidth,
                        linkOpacity: options.linkOpacity,
                        states: options.states
                    }
                });
                // First translate all nodes so we can use them when drawing links
                nodeColumns.forEach(function (column) {
                    column.forEach(function (node) {
                        series.translateNode(node, column);
                    });
                }, this);
                // Then translate links
                this.nodes.forEach(function (node) {
                    // Translate the links from this node
                    node.linksFrom.forEach(function (linkPoint) {
                        // If weight is 0 - don't render the link path #12453,
                        // render null points (for organization chart)
                        if ((linkPoint.weight || linkPoint.isNull) && linkPoint.to) {
                            series.translateLink(linkPoint);
                            linkPoint.allowShadow = false;
                        }
                    });
                });
            },
            /**
             * Extend the render function to also render this.nodes together with
             * the points.
             * @private
             */
            render: function () {
                var points = this.points;
                this.points = this.points.concat(this.nodes || []);
                H.seriesTypes.column.prototype.render.call(this);
                this.points = points;
            },
            /* eslint-enable valid-jsdoc */
            animate: H.Series.prototype.animate
        }, {
            applyOptions: function (options, x) {
                Point.prototype.applyOptions.call(this, options, x);
                // Treat point.level as a synonym of point.column
                if (defined(this.options.level)) {
                    this.options.column = this.column = this.options.level;
                }
                return this;
            },
            setState: NodesMixin.setNodeState,
            getClassName: function () {
                return (this.isNode ? 'highcharts-node ' : 'highcharts-link ') +
                    Point.prototype.getClassName.call(this);
            },
            isValid: function () {
                return this.isNode || typeof this.weight === 'number';
            }
        });
        /**
         * A `sankey` series. If the [type](#series.sankey.type) option is not
         * specified, it is inherited from [chart.type](#chart.type).
         *
         * @extends   series,plotOptions.sankey
         * @excluding animationLimit, boostBlending, boostThreshold, borderColor,
         *            borderRadius, borderWidth, crisp, cropThreshold, dataParser,
         *            dataURL, depth, dragDrop, edgeColor, edgeWidth,
         *            findNearestPointBy, getExtremesFromAll, grouping, groupPadding,
         *            groupZPadding, label, maxPointWidth, negativeColor, pointInterval,
         *            pointIntervalUnit, pointPadding, pointPlacement, pointRange,
         *            pointStart, pointWidth, shadow, softThreshold, stacking,
         *            threshold, zoneAxis, zones, dataSorting
         * @product   highcharts
         * @requires  modules/sankey
         * @apioption series.sankey
         */
        /**
         * A collection of options for the individual nodes. The nodes in a sankey
         * diagram are auto-generated instances of `Highcharts.Point`, but options can
         * be applied here and linked by the `id`.
         *
         * @sample highcharts/css/sankey/
         *         Sankey diagram with node options
         *
         * @declare   Highcharts.SeriesSankeyNodesOptionsObject
         * @type      {Array<*>}
         * @product   highcharts
         * @apioption series.sankey.nodes
         */
        /**
         * The id of the auto-generated node, refering to the `from` or `to` setting of
         * the link.
         *
         * @type      {string}
         * @product   highcharts
         * @apioption series.sankey.nodes.id
         */
        /**
         * The color of the auto generated node.
         *
         * @type      {Highcharts.ColorString|Highcharts.GradientColorObject|Highcharts.PatternObject}
         * @product   highcharts
         * @apioption series.sankey.nodes.color
         */
        /**
         * The color index of the auto generated node, especially for use in styled
         * mode.
         *
         * @type      {number}
         * @product   highcharts
         * @apioption series.sankey.nodes.colorIndex
         */
        /**
         * An optional column index of where to place the node. The default behaviour is
         * to place it next to the preceding node. Note that this option name is
         * counter intuitive in inverted charts, like for example an organization chart
         * rendered top down. In this case the "columns" are horizontal.
         *
         * @sample highcharts/plotoptions/sankey-node-column/
         *         Specified node column
         *
         * @type      {number}
         * @since     6.0.5
         * @product   highcharts
         * @apioption series.sankey.nodes.column
         */
        /**
         * Individual data label for each node. The options are the same as
         * the ones for [series.sankey.dataLabels](#series.sankey.dataLabels).
         *
         * @extends   plotOptions.sankey.dataLabels
         * @apioption series.sankey.nodes.dataLabels
         */
        /**
         * An optional level index of where to place the node. The default behaviour is
         * to place it next to the preceding node. Alias of `nodes.column`, but in
         * inverted sankeys and org charts, the levels are laid out as rows.
         *
         * @type      {number}
         * @since     7.1.0
         * @product   highcharts
         * @apioption series.sankey.nodes.level
         */
        /**
         * The name to display for the node in data labels and tooltips. Use this when
         * the name is different from the `id`. Where the id must be unique for each
         * node, this is not necessary for the name.
         *
         * @sample highcharts/css/sankey/
         *         Sankey diagram with node options
         *
         * @type      {string}
         * @product   highcharts
         * @apioption series.sankey.nodes.name
         */
        /**
         * In a horizontal layout, the vertical offset of a node in terms of weight.
         * Positive values shift the node downwards, negative shift it upwards. In a
         * vertical layout, like organization chart, the offset is horizontal.
         *
         * If a percantage string is given, the node is offset by the percentage of the
         * node size plus `nodePadding`.
         *
         * @sample highcharts/plotoptions/sankey-node-column/
         *         Specified node offset
         *
         * @type      {number|string}
         * @default   0
         * @since     6.0.5
         * @product   highcharts
         * @apioption series.sankey.nodes.offset
         */
        /**
         * An array of data points for the series. For the `sankey` series type,
         * points can be given in the following way:
         *
         * An array of objects with named values. The following snippet shows only a
         * few settings, see the complete options set below. If the total number of data
         * points exceeds the series' [turboThreshold](#series.area.turboThreshold),
         * this option is not available.
         *
         *  ```js
         *     data: [{
         *         from: 'Category1',
         *         to: 'Category2',
         *         weight: 2
         *     }, {
         *         from: 'Category1',
         *         to: 'Category3',
         *         weight: 5
         *     }]
         *  ```
         *
         * @sample {highcharts} highcharts/series/data-array-of-objects/
         *         Config objects
         *
         * @declare   Highcharts.SeriesSankeyPointOptionsObject
         * @type      {Array<*>}
         * @extends   series.line.data
         * @excluding dragDrop, drilldown, marker, x, y
         * @product   highcharts
         * @apioption series.sankey.data
         */
        /**
         * The color for the individual _link_. By default, the link color is the same
         * as the node it extends from. The `series.fillOpacity` option also applies to
         * the points, so when setting a specific link color, consider setting the
         * `fillOpacity` to 1.
         *
         * @type      {Highcharts.ColorString|Highcharts.GradientColorObject|Highcharts.PatternObject}
         * @product   highcharts
         * @apioption series.sankey.data.color
         */
        /**
         * @type      {Highcharts.SeriesSankeyDataLabelsOptionsObject|Array<Highcharts.SeriesSankeyDataLabelsOptionsObject>}
         * @product   highcharts
         * @apioption series.sankey.data.dataLabels
         */
        /**
         * The node that the link runs from.
         *
         * @type      {string}
         * @product   highcharts
         * @apioption series.sankey.data.from
         */
        /**
         * The node that the link runs to.
         *
         * @type      {string}
         * @product   highcharts
         * @apioption series.sankey.data.to
         */
        /**
         * Whether the link goes out of the system.
         *
         * @sample highcharts/plotoptions/sankey-outgoing
         *         Sankey chart with outgoing links
         *
         * @type      {boolean}
         * @default   false
         * @product   highcharts
         * @apioption series.sankey.data.outgoing
         */
        /**
         * The weight of the link.
         *
         * @type      {number|null}
         * @product   highcharts
         * @apioption series.sankey.data.weight
         */
        ''; // adds doclets above to transpiled file

    });
    _registerModule(_modules, 'masters/modules/sankey.src.js', [], function () {


    });
}));