text: c3_chart_fn.data = function (targetIds) {
      var targets = this.internal.data.targets;
      return typeof targetIds === 'undefined' ? targets : targets.filter(function (t) {
          return [].concat(targetIds).indexOf(t.id) >= 0;
      });
  };
  c3_chart_fn.data.shown = function (targetIds) {
      return this.internal.filterTargetsToShow(this.data(targetIds));
  };
  c3_chart_fn.data.values = function (targetId) {
      var targets, values = null;
      if (targetId) {
          targets = this.data(targetId);
          values = targets[0] ? targets[0].values.map(function (d) { return d.value; }) : null;
      }
      return values;
  };
  c3_chart_fn.data.names = function (names) {
      this.internal.clearLegendItemTextBoxCache();
      return this.internal.updateDataAttributes('names', names);
  };
  c3_chart_fn.data.colors = function (colors) {
      return this.internal.updateDataAttributes('colors', colors);
  };
  c3_chart_fn.data.axes = function (axes) {
      return this.internal.updateDataAttributes('axes', axes);
  };
  