helper 目录参考

文件
	nim_qchat_attachment_cpp_def.h
	nim_qchat_channel_cpp_def.h
	nim_qchat_client_cpp_def.h
	nim_qchat_helper.h
	圈组CPP wrapper helpers
	nim_qchat_member_cpp_def.h
	nim_qchat_message_cpp_def.h
	nim_qchat_message_cpp_helper.cpp
	nim_qchat_public_cpp_def.h
	nim_qchat_role_cpp_def.h
	nim_qchat_server_cpp_def.h
	nim_qchat_system_notification_cpp_def.h