public JSystemPiqi.system_error buildPartial() {
        JSystemPiqi.system_error result = new JSystemPiqi.system_error(this);
        int from_bitField0_ = bitField0_;
        int to_bitField0_ = 0;
        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
          to_bitField0_ |= 0x00000001;
        }
        result.code_ = code_;
        if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
          to_bitField0_ |= 0x00000002;
        }
        result.description_ = description_;
        result.bitField0_ = to_bitField0_;
        onBuilt();
        return result;
      }