成员的完整列表，这些成员属于 com.netease.nimlib.sdk.chatroom.model.ChatRoomMemberUpdate,包括所有继承而来的类成员

getAvatar()	com.netease.nimlib.sdk.chatroom.model.ChatRoomMemberUpdate
getExtension()	com.netease.nimlib.sdk.chatroom.model.ChatRoomMemberUpdate
getNick()	com.netease.nimlib.sdk.chatroom.model.ChatRoomMemberUpdate
isNeedSave()	com.netease.nimlib.sdk.chatroom.model.ChatRoomMemberUpdate
setAvatar(String avatar)	com.netease.nimlib.sdk.chatroom.model.ChatRoomMemberUpdate
setExtension(Map< String, Object > extension)	com.netease.nimlib.sdk.chatroom.model.ChatRoomMemberUpdate
setNeedSave(boolean needSave)	com.netease.nimlib.sdk.chatroom.model.ChatRoomMemberUpdate
setNick(String nick)	com.netease.nimlib.sdk.chatroom.model.ChatRoomMemberUpdate