'宣言
Public MustInherit Class _MergedItemizedLegendInitializer (Of T As _MergedItemizedLegendDataModel(Of R), U As ILegendDefinition, R As _ItemizedPointLegendItemDataModel) Inherits _MergedLegendInitializer(Of T,U) Implements ILegendInitializer
public abstract class _MergedItemizedLegendInitializer<T,U,R> : _MergedLegendInitializer<T,U>, ILegendInitializer where T: _MergedItemizedLegendDataModel<R> where U: ILegendDefinition where R: _ItemizedPointLegendItemDataModel