LIST_CASE(b, TF_ATTR_BOOL);
      LIST_CASE(type, TF_ATTR_TYPE);
      LIST_CASE(
          shape, TF_ATTR_SHAPE, metadata.total_size = 0;
          for (int i = 0; i < attr->list().shape_size(); ++i) {
            const auto& s = attr->list().shape(i);
            metadata.total_size += s.unknown_rank() ? 0 : s.dim_size();
          });
      LIST_CASE(tensor, TF_ATTR_TENSOR);