notifyExtension property Null safety

Map<String, dynamic>? notifyExtension
@JsonKey(fromJson: castPlatformMapToDartMap), read / write

操作产生的通知事件中开发者自定义的扩展字段(可选)

Implementation

@JsonKey(fromJson: castPlatformMapToDartMap)
Map<String, dynamic>? notifyExtension;