private com.google.protobuf.SingleFieldBuilder<
          org.bwapi.proxy.messages.GameMessages.UnitId, org.bwapi.proxy.messages.GameMessages.UnitId.Builder, org.bwapi.proxy.messages.GameMessages.UnitIdOrBuilder> 
          getHatcheryFieldBuilder() {
        if (hatcheryBuilder_ == null) {
          hatcheryBuilder_ = new com.google.protobuf.SingleFieldBuilder<
              org.bwapi.proxy.messages.GameMessages.UnitId, org.bwapi.proxy.messages.GameMessages.UnitId.Builder, org.bwapi.proxy.messages.GameMessages.UnitIdOrBuilder>(
                  hatchery_,
                  getParentForChildren(),
                  isClean());
          hatchery_ = null;
        }
        return hatcheryBuilder_;
      }