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

failed_count	NIMQChatAddMembersToServerRoleResp
failed_list	NIMQChatAddMembersToServerRoleResp
res_code	NIMQChatAddMembersToServerRoleResp
succeed_count	NIMQChatAddMembersToServerRoleResp
succeed_list	NIMQChatAddMembersToServerRoleResp
user_data	NIMQChatAddMembersToServerRoleResp