private com.google.protobuf.SingleFieldBuilder<
          org.bwapi.proxy.messages.BasicTypes.TilePosition, org.bwapi.proxy.messages.BasicTypes.TilePosition.Builder, org.bwapi.proxy.messages.BasicTypes.TilePositionOrBuilder> 
          getTilePositionFieldBuilder() {
        if (tilePositionBuilder_ == null) {
          tilePositionBuilder_ = new com.google.protobuf.SingleFieldBuilder<
              org.bwapi.proxy.messages.BasicTypes.TilePosition, org.bwapi.proxy.messages.BasicTypes.TilePosition.Builder, org.bwapi.proxy.messages.BasicTypes.TilePositionOrBuilder>(
                  tilePosition_,
                  getParentForChildren(),
                  isClean());
          tilePosition_ = null;
        }
        return tilePositionBuilder_;
      }