public Builder clearHandleUserJoin() {
        if (handleUserJoinBuilder_ == null) {
          handleUserJoin_ = JInPiqi.handle_user_join.getDefaultInstance();
          onChanged();
        } else {
          handleUserJoinBuilder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000002);
        return this;
      }