public Builder mergeWhatBuildsType(org.bwapi.proxy.messages.GameMessages.UnitType value) {
        if (whatBuildsTypeBuilder_ == null) {
          if (((bitField0_ & 0x00000010) == 0x00000010) &&
              whatBuildsType_ != org.bwapi.proxy.messages.GameMessages.UnitType.getDefaultInstance()) {
            whatBuildsType_ =
              org.bwapi.proxy.messages.GameMessages.UnitType.newBuilder(whatBuildsType_).mergeFrom(value).buildPartial();
          } else {
            whatBuildsType_ = value;
          }
          onChanged();
        } else {
          whatBuildsTypeBuilder_.mergeFrom(value);
        }
        bitField0_ |= 0x00000010;
        return this;
      }