absl::InlinedVector<mlir::Attribute, 8> attrs;
        for (const auto& item : value.list().func()) {
          TF_ASSIGN_OR_RETURN(auto attr, ConvertFunctionCallName(item.name()));
          if (item.attr_size() != 0)
            return errors::Unimplemented(
                "func attributes with non-zero attr.size()");
          if (attr) attrs.push_back(attr);
        }
        return builder_.getArrayAttr(

      LIST_CASE(tensor, TF_ATTR_FUNC);
#undef LIST_CASE
      // All lists empty, determine the type from the OpDef.
      if (metadata.list_size == 0) {
        for (int i = 0; i < oper->node.op_def().attr_size(); ++i) {
          const auto& a = oper->node.op_def().attr(i);
          if (a.name() != attr_name) continue;
          const string& typestr = a.type();
          if (typestr == "list(string)") {