成员的完整列表，这些成员属于 NIMQChatRTCChannelOnlineMember,包括所有继承而来的类成员

	accid	NIMQChatRTCChannelOnlineMember
	appId	NIMQChatRTCChannelOnlineMember
	avatar	NIMQChatRTCChannelOnlineMember
	createTime	NIMQChatRTCChannelOnlineMember
	custom	NIMQChatRTCChannelOnlineMember
	inviter	NIMQChatRTCChannelOnlineMember
	joinTime	NIMQChatRTCChannelOnlineMember
	nick	NIMQChatRTCChannelOnlineMember
	serverId	NIMQChatRTCChannelOnlineMember
	type	NIMQChatRTCChannelOnlineMember
	updateTime	NIMQChatRTCChannelOnlineMember
	validFlag	NIMQChatRTCChannelOnlineMember