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