public Builder mergeStartLocation(org.bwapi.proxy.messages.BasicTypes.TilePosition value) {
        if (startLocationBuilder_ == null) {
          if (((bitField0_ & 0x00000040) == 0x00000040) &&
              startLocation_ != org.bwapi.proxy.messages.BasicTypes.TilePosition.getDefaultInstance()) {
            startLocation_ =
              org.bwapi.proxy.messages.BasicTypes.TilePosition.newBuilder(startLocation_).mergeFrom(value).buildPartial();
          } else {
            startLocation_ = value;
          }
          onChanged();
        } else {
          startLocationBuilder_.mergeFrom(value);
        }
        bitField0_ |= 0x00000040;
        return this;
      }