public Builder setBuildUnit(
          org.bwapi.proxy.messages.GameMessages.UnitId.Builder builderForValue) {
        if (buildUnitBuilder_ == null) {
          buildUnit_ = builderForValue.build();
          onChanged();
        } else {
          buildUnitBuilder_.setMessage(builderForValue.build());
        }
        bitField1_ |= 0x00000040;
        return this;
      }