'宣言
Public Class _SankeyRadialCoordinateSystemDefinition Inherits _PolarCoordinateSystemDefinition Implements ICoordinateSystemDefinition, IPolarCoordinateSystemDefinition, ISankeyRadialCoordinateSystemDefinition
public class _SankeyRadialCoordinateSystemDefinition : _PolarCoordinateSystemDefinition, ICoordinateSystemDefinition, IPolarCoordinateSystemDefinition, ISankeyRadialCoordinateSystemDefinition