public Builder mergeUsers(JOutPiqi.userid_list value) {
        if (usersBuilder_ == null) {
          if (((bitField0_ & 0x00000002) == 0x00000002) &&
              users_ != JOutPiqi.userid_list.getDefaultInstance()) {
            users_ =
              JOutPiqi.userid_list.newBuilder(users_).mergeFrom(value).buildPartial();
          } else {
            users_ = value;
          }
          onChanged();
        } else {
          usersBuilder_.mergeFrom(value);
        }
        bitField0_ |= 0x00000002;
        return this;
      }