docs: public ResponseWrapper addChatRoomMember(long roomId, Members members)
              throws APIConnectionException, APIRequestException {
          Preconditions.checkArgument(roomId > 0, "room id is invalid");
          Preconditions.checkArgument(members != null, "members should not be empty");
          return _httpClient.sendPut(_baseUrl + mChatRoomPath + "/" + roomId + "/members", members.toString());
      }