'宣言
Public MustInherit Class _SankeyPlotDefinition Inherits GrapeCity.DataVisualization.Chart._BasePlotDefinition(Of ISankeyEncodingsDefinition) Implements IPlotDefinition, IQueryInterface, ISankeyPlotDefinition
public abstract class _SankeyPlotDefinition : GrapeCity.DataVisualization.Chart._BasePlotDefinition<ISankeyEncodingsDefinition>, IPlotDefinition, IQueryInterface, ISankeyPlotDefinition