'宣言
Public Class _SankeyGrouping Inherits _DataModel Implements IDataModel, GrapeCity.DataVisualization.Chart.IGrouping(Of ISankeyGroupingKey), ISankeyGrouping
public class _SankeyGrouping : _DataModel, IDataModel, GrapeCity.DataVisualization.Chart.IGrouping<ISankeyGroupingKey>, ISankeyGrouping