/**
                             * Provides functionality for creating a stacked spline series.
                             *
                             * @module charts
                             * @submodule series-spline-stacked
                             */
                            /**
                             * StackedSplineSeries creates spline graphs in which the different series are stacked along a value axis
                             * to indicate their contribution to a cumulative total.
                             *
                             * @class StackedSplineSeries
                             * @constructor
                             * @extends SplineSeries
                             * @uses StackingUtil
                             * @param {Object} config (optional) Configuration parameters.
                             * @submodule series-spline-stacked
                             */
                            Y.StackedSplineSeries = Y.Base.create("stackedSplineSeries", Y.SplineSeries, [Y.StackingUtil], {
                                /**
                                 * @protected
                                 *
                                 * Calculates the coordinates for the series. Overrides base implementation.
                                 *
                                 * @method setAreaData
                                 */
                                setAreaData: function()
                                {
                                    Y.StackedSplineSeries.superclass.setAreaData.apply(this);
                                    this._stackCoordinates.apply(this);
                                }
                            }, {
                                ATTRS: {
                                    /**
                                     * Read-only attribute indicating the type of series.
                                     *
                                     * @attribute type
                                     * @type String
                                     * @default stackedSpline
                                     */
                                    type: {
                                        value:"stackedSpline"
                                    }
                                }
                            });