'宣言
Public Class _TextGroupOverlayOption Inherits _TextOverlayOption Implements GrapeCity.DataVisualization.Chart.IOptionStrictMode, IAnnotationOverlayOption, IJsonOption, IOption, IOverlayOption, ITextGroupOverlayOption, ITextOverlayOption
public class _TextGroupOverlayOption : _TextOverlayOption, GrapeCity.DataVisualization.Chart.IOptionStrictMode, IAnnotationOverlayOption, IJsonOption, IOption, IOverlayOption, ITextGroupOverlayOption, ITextOverlayOption