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nim_core
nim_core
QChatMessage
callbackExtension property
callbackExtension
brightness_4
brightness_5
callbackExtension
property
String
?
callbackExtension
getter/setter pair
第三方回调回来的自定义扩展字段
Implementation
String? callbackExtension;
nim_core
nim_core
QChatMessage
callbackExtension property
QChatMessage class