void** values, size_t* lengths,
                                   int max_values, void* storage,
                                   size_t storage_size, TF_Status* status) {
  const auto* attr = GetAttrValue(oper, attr_name, status);
  if (!status->status.ok()) return;
  if (attr->value_case() != tensorflow::AttrValue::kList) {
    status->status =