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

accid	NIMQChatRemoveMemberRoleParam
cb	NIMQChatRemoveMemberRoleParam
channel_id	NIMQChatRemoveMemberRoleParam
server_id	NIMQChatRemoveMemberRoleParam
user_data	NIMQChatRemoveMemberRoleParam