extension property Null safety
@JsonKey(fromJson: castPlatformMapToDartMap), read / write
消息自定义扩展
Implementation
@JsonKey(fromJson: castPlatformMapToDartMap)
Map<String, dynamic>? extension;
消息自定义扩展
@JsonKey(fromJson: castPlatformMapToDartMap)
Map<String, dynamic>? extension;