public Builder mergeTilePosition(org.bwapi.proxy.messages.BasicTypes.TilePosition value) {
        if (tilePositionBuilder_ == null) {
          if (((bitField0_ & 0x08000000) == 0x08000000) &&
              tilePosition_ != org.bwapi.proxy.messages.BasicTypes.TilePosition.getDefaultInstance()) {
            tilePosition_ =
              org.bwapi.proxy.messages.BasicTypes.TilePosition.newBuilder(tilePosition_).mergeFrom(value).buildPartial();
          } else {
            tilePosition_ = value;
          }
          onChanged();
        } else {
          tilePositionBuilder_.mergeFrom(value);
        }
        bitField0_ |= 0x08000000;
        return this;
      }