public Builder clearInitialTilePosition() {
        if (initialTilePositionBuilder_ == null) {
          initialTilePosition_ = org.bwapi.proxy.messages.BasicTypes.TilePosition.getDefaultInstance();
          onChanged();
        } else {
          initialTilePositionBuilder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x10000000);
        return this;
      }