public Builder mergeSystem(JSystemPiqi.system_response value) {
        if (systemBuilder_ == null) {
          if (((bitField0_ & 0x00000040) == 0x00000040) &&
              system_ != JSystemPiqi.system_response.getDefaultInstance()) {
            system_ =
              JSystemPiqi.system_response.newBuilder(system_).mergeFrom(value).buildPartial();
          } else {
            system_ = value;
          }
          onChanged();
        } else {
          systemBuilder_.mergeFrom(value);
        }
        bitField0_ |= 0x00000040;
        return this;
      }