text: /**
   * @license Highcharts JS v5.0.2 (2016-10-26)
   *
   * (c) 2014 Highsoft AS
   * Authors: Jon Arild Nygard / Oystein Moseng
   *
   * License: www.highcharts.com/license
   */
  (function(factory) {
      if (typeof module === 'object' && module.exports) {
          module.exports = factory;
      } else {
          factory(Highcharts);
      }
  }(function(Highcharts) {
      (function(H) {
          /**
           * (c) 2014 Highsoft AS
           * Authors: Jon Arild Nygard / Oystein Moseng
           *
           * License: www.highcharts.com/license
           */
          'use strict';
  
          var seriesType = H.seriesType,
              seriesTypes = H.seriesTypes,
              map = H.map,
              merge = H.merge,
              extend = H.extend,
              noop = H.noop,
              each = H.each,
              grep = H.grep,
              isNumber = H.isNumber,
              pick = H.pick,
              Series = H.Series,
              stableSort = H.stableSort,
              color = H.Color,
              eachObject = function(list, func, context) {
                  var key;
                  context = context || this;
                  for (key in list) {
                      if (list.hasOwnProperty(key)) {
                          func.call(context, list[key], key, list);
                      }
                  }
              },
              reduce = function(arr, func, previous, context) {
                  context = context || this;
                  arr = arr || []; // @note should each be able to handle empty values automatically?
                  each(arr, function(current, i) {
                      previous = func.call(context, previous, current, i, arr);
                  });
                  return previous;
              },
              // @todo find correct name for this function. 
              // @todo Similar to reduce, this function is likely redundant
              recursive = function(item, func, context) {
                  var next;
                  context = context || this;
                  next = func.call(context, item);
                  if (next !== false) {
                      recursive(next, func, context);
                  }
              };
  
          // The Treemap series type
          seriesType('treemap', 'scatter', {
              showInLegend: false,
              marker: false,
              dataLabels: {
                  enabled: true,
                  defer: false,
                  verticalAlign: 'middle',
                  formatter: function() { // #2945
                      return this.point.name || this.point.id;
                  },
                  inside: true
              },
              tooltip: {
                  headerFormat: '',
                  pointFormat: '<b>{point.name}</b>: {point.value}</b><br/>'
              },
              layoutAlgorithm: 'sliceAndDice',
              layoutStartingDirection: 'vertical',
              alternateStartingDirection: false,
              levelIsConstant: true,
              drillUpButton: {
                  position: {
                      align: 'right',
                      x: -10,
                      y: 10
                  }
              },
  
              // Presentational options
              borderColor: '#e6e6e6',
              borderWidth: 1,
              opacity: 0.15,
              states: {
                  hover: {
                      borderColor: '#999999',
                      brightness: seriesTypes.heatmap ? 0 : 0.1,
                      opacity: 0.75,
                      shadow: false
                  }
              }
  
  
              // Prototype members
          }, {
              pointArrayMap: ['value'],
              axisTypes: seriesTypes.heatmap ? ['xAxis', 'yAxis', 'colorAxis'] : ['xAxis', 'yAxis'],
              optionalAxis: 'colorAxis',
              getSymbol: noop,
              parallelArrays: ['x', 'y', 'value', 'colorValue'],
              colorKey: 'colorValue', // Point color option key
              translateColors: seriesTypes.heatmap && seriesTypes.heatmap.prototype.translateColors,
              trackerGroups: ['group', 'dataLabelsGroup'],
              /**
               * Creates an object map from parent id to childrens index.
               * @param {Array} data List of points set in options.
               * @param {string} data[].parent Parent id of point.
               * @param {Array} ids List of all point ids.
               * @return {Object} Map from parent id to children index in data.
               */
              getListOfParents: function(data, ids) {
                  var listOfParents = reduce(data, function(prev, curr, i) {
                      var parent = pick(curr.parent, '');
                      if (prev[parent] === undefined) {
                          prev[parent] = [];
                      }
                      prev[parent].push(i);
                      return prev;
                  }, {});
  
                  // If parent does not exist, hoist parent to root of tree.
                  eachObject(listOfParents, function(children, parent, list) {
                      if ((parent !== '') && (H.inArray(parent, ids) === -1)) {
                          each(children, function(child) {
                              list[''].push(child);
                          });
                          delete list[parent];
                      }
                  });
                  return listOfParents;
              },
              /**
               * Creates a tree structured object from the series points
               */
              getTree: function() {
                  var tree,
                      series = this,
                      allIds = map(this.data, function(d) {
                          return d.id;
                      }),
                      parentList = series.getListOfParents(this.data, allIds);
  
                  series.nodeMap = [];
                  tree = series.buildNode('', -1, 0, parentList, null);
                  // Parents of the root node is by default visible
                  recursive(this.nodeMap[this.rootNode], function(node) {
                      var next = false,
                          p = node.parent;
                      node.visible = true;
                      if (p || p === '') {
                          next = series.nodeMap[p];
                      }
                      return next;
                  });
                  // Children of the root node is by default visible
                  recursive(this.nodeMap[this.rootNode].children, function(children) {
                      var next = false;
                      each(children, function(child) {
                          child.visible = true;
                          if (child.children.length) {
                              next = (next || []).concat(child.children);
                          }
                      });
                      return next;
                  });
                  this.setTreeValues(tree);
                  return tree;
              },
              init: function(chart, options) {
                  var series = this;
                  Series.prototype.init.call(series, chart, options);
                  if (series.options.allowDrillToNode) {
                      series.drillTo();
                  }
              },
              buildNode: function(id, i, level, list, parent) {
                  var series = this,
                      children = [],
                      point = series.points[i],
                      node,
                      child;
  
                  // Actions
                  each((list[id] || []), function(i) {
                      child = series.buildNode(series.points[i].id, i, (level + 1), list, id);
                      children.push(child);
                  });
                  node = {
                      id: id,
                      i: i,
                      children: children,
                      level: level,
                      parent: parent,
                      visible: false // @todo move this to better location
                  };
                  series.nodeMap[node.id] = node;
                  if (point) {
                      point.node = node;
                  }
                  return node;
              },
              setTreeValues: function(tree) {
                  var series = this,
                      options = series.options,
                      childrenTotal = 0,
                      children = [],
                      val,
                      point = series.points[tree.i];
  
                  // First give the children some values
                  each(tree.children, function(child) {
                      child = series.setTreeValues(child);
                      children.push(child);
  
                      if (!child.ignore) {
                          childrenTotal += child.val;
                      } else {
                          // @todo Add predicate to avoid looping already ignored children
                          recursive(child.children, function(children) {
                              var next = false;
                              each(children, function(node) {
                                  extend(node, {
                                      ignore: true,
                                      isLeaf: false,
                                      visible: false
                                  });
                                  if (node.children.length) {
                                      next = (next || []).concat(node.children);
                                  }
                              });
                              return next;
                          });
                      }
                  });
                  // Sort the children
                  stableSort(children, function(a, b) {
                      return a.sortIndex - b.sortIndex;
                  });
                  // Set the values
                  val = pick(point && point.options.value, childrenTotal);
                  if (point) {
                      point.value = val;
                  }
                  extend(tree, {
                      children: children,
                      childrenTotal: childrenTotal,
                      // Ignore this node if point is not visible
                      ignore: !(pick(point && point.visible, true) && (val > 0)),
                      isLeaf: tree.visible && !childrenTotal,
                      levelDynamic: (options.levelIsConstant ? tree.level : (tree.level - series.nodeMap[series.rootNode].level)),
                      name: pick(point && point.name, ''),
                      sortIndex: pick(point && point.sortIndex, -val),
                      val: val
                  });
                  return tree;
              },
              /**
               * Recursive function which calculates the area for all children of a node.
               * @param {Object} node The node which is parent to the children.
               * @param {Object} area The rectangular area of the parent.
               */
              calculateChildrenAreas: function(parent, area) {
                  var series = this,
                      options = series.options,
                      level = this.levelMap[parent.levelDynamic + 1],
                      algorithm = pick((series[level && level.layoutAlgorithm] && level.layoutAlgorithm), options.layoutAlgorithm),
                      alternate = options.alternateStartingDirection,
                      childrenValues = [],
                      children;
  
                  // Collect all children which should be included
                  children = grep(parent.children, function(n) {
                      return !n.ignore;
                  });
  
                  if (level && level.layoutStartingDirection) {
                      area.direction = level.layoutStartingDirection === 'vertical' ? 0 : 1;
                  }
                  childrenValues = series[algorithm](area, children);
                  each(children, function(child, index) {
                      var values = childrenValues[index];
                      child.values = merge(values, {
                          val: child.childrenTotal,
                          direction: (alternate ? 1 - area.direction : area.direction)
                      });
                      child.pointValues = merge(values, {
                          x: (values.x / series.axisRatio),
                          width: (values.width / series.axisRatio)
                      });
                      // If node has children, then call method recursively
                      if (child.children.length) {
                          series.calculateChildrenAreas(child, child.values);
                      }
                  });
              },
              setPointValues: function() {
                  var series = this,
                      xAxis = series.xAxis,
                      yAxis = series.yAxis;
                  each(series.points, function(point) {
                      var node = point.node,
                          values = node.pointValues,
                          x1,
                          x2,
                          y1,
                          y2,
                          crispCorr = 0.5; // Assume 1px borderWidth for simplicity
  
                      // Points which is ignored, have no values.
                      if (values && node.visible) {
                          x1 = Math.round(xAxis.translate(values.x, 0, 0, 0, 1)) - crispCorr;
                          x2 = Math.round(xAxis.translate(values.x + values.width, 0, 0, 0, 1)) - crispCorr;
                          y1 = Math.round(yAxis.translate(values.y, 0, 0, 0, 1)) - crispCorr;
                          y2 = Math.round(yAxis.translate(values.y + values.height, 0, 0, 0, 1)) - crispCorr;
                          // Set point values
                          point.shapeType = 'rect';
                          point.shapeArgs = {
                              x: Math.min(x1, x2),
                              y: Math.min(y1, y2),
                              width: Math.abs(x2 - x1),
                              height: Math.abs(y2 - y1)
                          };
                          point.plotX = point.shapeArgs.x + (point.shapeArgs.width / 2);
                          point.plotY = point.shapeArgs.y + (point.shapeArgs.height / 2);
                      } else {
                          // Reset visibility
                          delete point.plotX;
                          delete point.plotY;
                      }
                  });
              },
              setColorRecursive: function(node, color, colorIndex) {
                  var series = this,
                      point,
                      level;
                  if (node) {
                      point = series.points[node.i];
                      level = series.levelMap[node.levelDynamic];
                      // Select either point color, level color or inherited color.
                      color = pick(point && point.options.color, level && level.color, color);
                      colorIndex = pick(point && point.options.colorIndex, level && level.colorIndex, colorIndex);
                      if (point) {
                          point.color = color;
                          point.colorIndex = colorIndex;
                      }
  
                      // Do it all again with the children	
                      if (node.children.length) {
                          each(node.children, function(child) {
                              series.setColorRecursive(child, color, colorIndex);
                          });
                      }
                  }
              },
              algorithmGroup: function(h, w, d, p) {
                  this.height = h;
                  this.width = w;
                  this.plot = p;
                  this.direction = d;
                  this.startDirection = d;
                  this.total = 0;
                  this.nW = 0;
                  this.lW = 0;
                  this.nH = 0;
                  this.lH = 0;
                  this.elArr = [];
                  this.lP = {
                      total: 0,
                      lH: 0,
                      nH: 0,
                      lW: 0,
                      nW: 0,
                      nR: 0,
                      lR: 0,
                      aspectRatio: function(w, h) {
                          return Math.max((w / h), (h / w));
                      }
                  };
                  this.addElement = function(el) {
                      this.lP.total = this.elArr[this.elArr.length - 1];
                      this.total = this.total + el;
                      if (this.direction === 0) {
                          // Calculate last point old aspect ratio
                          this.lW = this.nW;
                          this.lP.lH = this.lP.total / this.lW;
                          this.lP.lR = this.lP.aspectRatio(this.lW, this.lP.lH);
                          // Calculate last point new aspect ratio
                          this.nW = this.total / this.height;
                          this.lP.nH = this.lP.total / this.nW;
                          this.lP.nR = this.lP.aspectRatio(this.nW, this.lP.nH);
                      } else {
                          // Calculate last point old aspect ratio
                          this.lH = this.nH;
                          this.lP.lW = this.lP.total / this.lH;
                          this.lP.lR = this.lP.aspectRatio(this.lP.lW, this.lH);
                          // Calculate last point new aspect ratio
                          this.nH = this.total / this.width;
                          this.lP.nW = this.lP.total / this.nH;
                          this.lP.nR = this.lP.aspectRatio(this.lP.nW, this.nH);
                      }
                      this.elArr.push(el);
                  };
                  this.reset = function() {
                      this.nW = 0;
                      this.lW = 0;
                      this.elArr = [];
                      this.total = 0;
                  };
              },
              algorithmCalcPoints: function(directionChange, last, group, childrenArea) {
                  var pX,
                      pY,
                      pW,
                      pH,
                      gW = group.lW,
                      gH = group.lH,
                      plot = group.plot,
                      keep,
                      i = 0,
                      end = group.elArr.length - 1;
                  if (last) {
                      gW = group.nW;
                      gH = group.nH;
                  } else {
                      keep = group.elArr[group.elArr.length - 1];
                  }
                  each(group.elArr, function(p) {
                      if (last || (i < end)) {
                          if (group.direction === 0) {
                              pX = plot.x;
                              pY = plot.y;
                              pW = gW;
                              pH = p / pW;
                          } else {
                              pX = plot.x;
                              pY = plot.y;
                              pH = gH;
                              pW = p / pH;
                          }
                          childrenArea.push({
                              x: pX,
                              y: pY,
                              width: pW,
                              height: pH
                          });
                          if (group.direction === 0) {
                              plot.y = plot.y + pH;
                          } else {
                              plot.x = plot.x + pW;
                          }
                      }
                      i = i + 1;
                  });
                  // Reset variables
                  group.reset();
                  if (group.direction === 0) {
                      group.width = group.width - gW;
                  } else {
                      group.height = group.height - gH;
                  }
                  plot.y = plot.parent.y + (plot.parent.height - group.height);
                  plot.x = plot.parent.x + (plot.parent.width - group.width);
                  if (directionChange) {
                      group.direction = 1 - group.direction;
                  }
                  // If not last, then add uncalculated element
                  if (!last) {
                      group.addElement(keep);
                  }
              },
              algorithmLowAspectRatio: function(directionChange, parent, children) {
                  var childrenArea = [],
                      series = this,
                      pTot,
                      plot = {
                          x: parent.x,
                          y: parent.y,
                          parent: parent
                      },
                      direction = parent.direction,
                      i = 0,
                      end = children.length - 1,
                      group = new this.algorithmGroup(parent.height, parent.width, direction, plot); // eslint-disable-line new-cap
                  // Loop through and calculate all areas
                  each(children, function(child) {
                      pTot = (parent.width * parent.height) * (child.val / parent.val);
                      group.addElement(pTot);
                      if (group.lP.nR > group.lP.lR) {
                          series.algorithmCalcPoints(directionChange, false, group, childrenArea, plot);
                      }
                      // If last child, then calculate all remaining areas
                      if (i === end) {
                          series.algorithmCalcPoints(directionChange, true, group, childrenArea, plot);
                      }
                      i = i + 1;
                  });
                  return childrenArea;
              },
              algorithmFill: function(directionChange, parent, children) {
                  var childrenArea = [],
                      pTot,
                      direction = parent.direction,
                      x = parent.x,
                      y = parent.y,
                      width = parent.width,
                      height = parent.height,
                      pX,
                      pY,
                      pW,
                      pH;
                  each(children, function(child) {
                      pTot = (parent.width * parent.height) * (child.val / parent.val);
                      pX = x;
                      pY = y;
                      if (direction === 0) {
                          pH = height;
                          pW = pTot / pH;
                          width = width - pW;
                          x = x + pW;
                      } else {
                          pW = width;
                          pH = pTot / pW;
                          height = height - pH;
                          y = y + pH;
                      }
                      childrenArea.push({
                          x: pX,
                          y: pY,
                          width: pW,
                          height: pH
                      });
                      if (directionChange) {
                          direction = 1 - direction;
                      }
                  });
                  return childrenArea;
              },
              strip: function(parent, children) {
                  return this.algorithmLowAspectRatio(false, parent, children);
              },
              squarified: function(parent, children) {
                  return this.algorithmLowAspectRatio(true, parent, children);
              },
              sliceAndDice: function(parent, children) {
                  return this.algorithmFill(true, parent, children);
              },
              stripes: function(parent, children) {
                  return this.algorithmFill(false, parent, children);
              },
              translate: function() {
                  var pointValues,
                      seriesArea,
                      tree,
                      val;
  
                  // Call prototype function
                  Series.prototype.translate.call(this);
  
                  // Assign variables
                  this.rootNode = pick(this.options.rootId, '');
                  // Create a object map from level to options
                  this.levelMap = reduce(this.options.levels, function(arr, item) {
                      arr[item.level] = item;
                      return arr;
                  }, {});
                  tree = this.tree = this.getTree(); // @todo Only if series.isDirtyData is true
  
                  // Calculate plotting values.
                  this.axisRatio = (this.xAxis.len / this.yAxis.len);
                  this.nodeMap[''].pointValues = pointValues = {
                      x: 0,
                      y: 0,
                      width: 100,
                      height: 100
                  };
                  this.nodeMap[''].values = seriesArea = merge(pointValues, {
                      width: (pointValues.width * this.axisRatio),
                      direction: (this.options.layoutStartingDirection === 'vertical' ? 0 : 1),
                      val: tree.val
                  });
                  this.calculateChildrenAreas(tree, seriesArea);
  
                  // Logic for point colors
                  if (this.colorAxis) {
                      this.translateColors();
                  } else if (!this.options.colorByPoint) {
                      this.setColorRecursive(this.tree);
                  }
  
                  // Update axis extremes according to the root node.
                  if (this.options.allowDrillToNode) {
                      val = this.nodeMap[this.rootNode].pointValues;
                      this.xAxis.setExtremes(val.x, val.x + val.width, false);
                      this.yAxis.setExtremes(val.y, val.y + val.height, false);
                      this.xAxis.setScale();
                      this.yAxis.setScale();
                  }
  
                  // Assign values to points.
                  this.setPointValues();
              },
              /**
               * Extend drawDataLabels with logic to handle custom options related to the treemap series:
               * - Points which is not a leaf node, has dataLabels disabled by default.
               * - Options set on series.levels is merged in.
               * - Width of the dataLabel is set to match the width of the point shape.
               */
              drawDataLabels: function() {
                  var series = this,
                      points = grep(series.points, function(n) {
                          return n.node.visible;
                      }),
                      options,
                      level;
                  each(points, function(point) {
                      level = series.levelMap[point.node.levelDynamic];
                      // Set options to new object to avoid problems with scope
                      options = {
                          style: {}
                      };
  
                      // If not a leaf, then label should be disabled as default
                      if (!point.node.isLeaf) {
                          options.enabled = false;
                      }
  
                      // If options for level exists, include them as well
                      if (level && level.dataLabels) {
                          options = merge(options, level.dataLabels);
                          series._hasPointLabels = true;
                      }
  
                      // Set dataLabel width to the width of the point shape.
                      if (point.shapeArgs) {
                          options.style.width = point.shapeArgs.width;
                          if (point.dataLabel) {
                              point.dataLabel.css({
                                  width: point.shapeArgs.width + 'px'
                              });
                          }
                      }
  
                      // Merge custom options with point options
                      point.dlOptions = merge(options, point.options.dataLabels);
                  });
                  Series.prototype.drawDataLabels.call(this);
              },
  
              /**
               * Over the alignment method by setting z index
               */
              alignDataLabel: function(point) {
                  seriesTypes.column.prototype.alignDataLabel.apply(this, arguments);
                  if (point.dataLabel) {
                      point.dataLabel.attr({
                          zIndex: point.node.zIndex + 1
                      });
                  }
              },
  
  
              /**
               * Get presentational attributes
               */
              pointAttribs: function(point, state) {
                  var level = this.levelMap[point.node.levelDynamic] || {},
                      options = this.options,
                      attr,
                      stateOptions = (state && options.states[state]) || {},
                      className = point.getClassName(),
                      opacity;
  
                  // Set attributes by precedence. Point trumps level trumps series. Stroke width uses pick
                  // because it can be 0.
                  attr = {
                      'stroke': point.borderColor || level.borderColor || stateOptions.borderColor || options.borderColor,
                      'stroke-width': pick(point.borderWidth, level.borderWidth, stateOptions.borderWidth, options.borderWidth),
                      'dashstyle': point.borderDashStyle || level.borderDashStyle || stateOptions.borderDashStyle || options.borderDashStyle,
                      'fill': point.color || this.color
                  };
  
                  // Hide levels above the current view
                  if (className.indexOf('highcharts-above-level') !== -1) {
                      attr.fill = 'none';
                      attr['stroke-width'] = 0;
  
                      // Nodes with children that accept interaction
                  } else if (className.indexOf('highcharts-internal-node-interactive') !== -1) {
                      opacity = pick(stateOptions.opacity, options.opacity);
                      attr.fill = color(attr.fill).setOpacity(opacity).get();
                      attr.cursor = 'pointer';
                      // Hide nodes that have children
                  } else if (className.indexOf('highcharts-internal-node') !== -1) {
                      attr.fill = 'none';
  
                  } else if (state) {
                      // Brighten and hoist the hover nodes
                      attr.fill = color(attr.fill).brighten(stateOptions.brightness).get();
                  }
                  return attr;
              },
  
  
              /**
               * Extending ColumnSeries drawPoints
               */
              drawPoints: function() {
                  var series = this,
                      points = grep(series.points, function(n) {
                          return n.node.visible;
                      });
  
                  each(points, function(point) {
                      var groupKey = 'levelGroup-' + point.node.levelDynamic;
                      if (!series[groupKey]) {
                          series[groupKey] = series.chart.renderer.g(groupKey)
                              .attr({
                                  zIndex: 1000 - point.node.levelDynamic // @todo Set the zIndex based upon the number of levels, instead of using 1000
                              })
                              .add(series.group);
                      }
                      point.group = series[groupKey];
  
                  });
                  // Call standard drawPoints
                  seriesTypes.column.prototype.drawPoints.call(this);
  
                  // If drillToNode is allowed, set a point cursor on clickables & add drillId to point 
                  if (series.options.allowDrillToNode) {
                      each(points, function(point) {
                          if (point.graphic) {
                              point.drillId = series.options.interactByLeaf ? series.drillToByLeaf(point) : series.drillToByGroup(point);
                          }
                      });
                  }
              },
              /**
               * Add drilling on the suitable points
               */
              drillTo: function() {
                  var series = this;
                  H.addEvent(series, 'click', function(event) {
                      var point = event.point,
                          drillId = point.drillId,
                          drillName;
                      // If a drill id is returned, add click event and cursor. 
                      if (drillId) {
                          drillName = series.nodeMap[series.rootNode].name || series.rootNode;
                          point.setState(''); // Remove hover
                          series.drillToNode(drillId);
                          series.showDrillUpButton(drillName);
                      }
                  });
              },
              /**
               * Finds the drill id for a parent node.
               * Returns false if point should not have a click event
               * @param {Object} point
               * @return {string || boolean} Drill to id or false when point should not have a click event
               */
              drillToByGroup: function(point) {
                  var series = this,
                      drillId = false;
                  if ((point.node.level - series.nodeMap[series.rootNode].level) === 1 && !point.node.isLeaf) {
                      drillId = point.id;
                  }
                  return drillId;
              },
              /**
               * Finds the drill id for a leaf node.
               * Returns false if point should not have a click event
               * @param {Object} point
               * @return {string || boolean} Drill to id or false when point should not have a click event
               */
              drillToByLeaf: function(point) {
                  var series = this,
                      drillId = false,
                      nodeParent;
                  if ((point.node.parent !== series.rootNode) && (point.node.isLeaf)) {
                      nodeParent = point.node;
                      while (!drillId) {
                          nodeParent = series.nodeMap[nodeParent.parent];
                          if (nodeParent.parent === series.rootNode) {
                              drillId = nodeParent.id;
                          }
                      }
                  }
                  return drillId;
              },
              drillUp: function() {
                  var drillPoint = null,
                      node,
                      parent;
                  if (this.rootNode) {
                      node = this.nodeMap[this.rootNode];
                      if (node.parent !== null) {
                          drillPoint = this.nodeMap[node.parent];
                      } else {
                          drillPoint = this.nodeMap[''];
                      }
                  }
  
                  if (drillPoint !== null) {
                      this.drillToNode(drillPoint.id);
                      if (drillPoint.id === '') {
                          this.drillUpButton = this.drillUpButton.destroy();
                      } else {
                          parent = this.nodeMap[drillPoint.parent];
                          this.showDrillUpButton((parent.name || parent.id));
                      }
                  }
              },
              drillToNode: function(id) {
                  this.options.rootId = id;
                  this.isDirty = true; // Force redraw
                  this.chart.redraw();
              },
              showDrillUpButton: function(name) {
                  var series = this,
                      backText = (name || '< Back'),
                      buttonOptions = series.options.drillUpButton,
                      attr,
                      states;
  
                  if (buttonOptions.text) {
                      backText = buttonOptions.text;
                  }
                  if (!this.drillUpButton) {
                      attr = buttonOptions.theme;
                      states = attr && attr.states;
  
                      this.drillUpButton = this.chart.renderer.button(
                              backText,
                              null,
                              null,
                              function() {
                                  series.drillUp();
                              },
                              attr,
                              states && states.hover,
                              states && states.select
                          )
                          .attr({
                              align: buttonOptions.position.align,
                              zIndex: 7
                          })
                          .add()
                          .align(buttonOptions.position, false, buttonOptions.relativeTo || 'plotBox');
                  } else {
                      this.drillUpButton.attr({
                              text: backText
                          })
                          .align();
                  }
              },
              buildKDTree: noop,
              drawLegendSymbol: H.LegendSymbolMixin.drawRectangle,
              getExtremes: function() {
                  // Get the extremes from the value data
                  Series.prototype.getExtremes.call(this, this.colorValueData);
                  this.valueMin = this.dataMin;
                  this.valueMax = this.dataMax;
  
                  // Get the extremes from the y data
                  Series.prototype.getExtremes.call(this);
              },
              getExtremesFromAll: true,
              bindAxes: function() {
                  var treeAxis = {
                      endOnTick: false,
                      gridLineWidth: 0,
                      lineWidth: 0,
                      min: 0,
                      dataMin: 0,
                      minPadding: 0,
                      max: 100,
                      dataMax: 100,
                      maxPadding: 0,
                      startOnTick: false,
                      title: null,
                      tickPositions: []
                  };
                  Series.prototype.bindAxes.call(this);
                  H.extend(this.yAxis.options, treeAxis);
                  H.extend(this.xAxis.options, treeAxis);
              }
  
              // Point class
          }, {
              getClassName: function() {
                  var className = H.Point.prototype.getClassName.call(this),
                      series = this.series,
                      options = series.options;
  
                  // Above the current level
                  if (this.node.level <= series.nodeMap[series.rootNode].level) {
                      className += ' highcharts-above-level';
  
                  } else if (!this.node.isLeaf && !pick(options.interactByLeaf, !options.allowDrillToNode)) {
                      className += ' highcharts-internal-node-interactive';
  
                  } else if (!this.node.isLeaf) {
                      className += ' highcharts-internal-node';
                  }
                  return className;
              },
              isValid: function() {
                  return isNumber(this.value);
              },
              setState: function(state) {
                  H.Point.prototype.setState.call(this, state);
                  this.graphic.attr({
                      zIndex: state === 'hover' ? 1 : 0
                  });
              },
              setVisible: seriesTypes.pie.prototype.pointClass.prototype.setVisible
          });
  
      }(Highcharts));
  }));
  