public Builder mergeInitialTilePosition(org.bwapi.proxy.messages.BasicTypes.TilePosition value) {
        if (initialTilePositionBuilder_ == null) {
          if (((bitField0_ & 0x10000000) == 0x10000000) &&
              initialTilePosition_ != org.bwapi.proxy.messages.BasicTypes.TilePosition.getDefaultInstance()) {
            initialTilePosition_ =
              org.bwapi.proxy.messages.BasicTypes.TilePosition.newBuilder(initialTilePosition_).mergeFrom(value).buildPartial();
          } else {
            initialTilePosition_ = value;
          }
          onChanged();
        } else {
          initialTilePositionBuilder_.mergeFrom(value);
        }
        bitField0_ |= 0x10000000;
        return this;
      }