metadata.type = TF_ATTR_FUNC;
          } else {
            status->status = InvalidArgument(
                "Attribute '", attr_name,
                "' has an empty value of an unrecognized type '", typestr, "'");
            return metadata;
          }
        }
      }
      break;

    case tensorflow::AttrValue::kPlaceholder:
      metadata.is_list = 0;