std::vector<::testing::Matcher<const Node*>> control_deps_vector;
  absl::c_copy(control_deps, std::back_inserter(control_deps_vector));

  impl::NodeMatcherProperties props;
  props.set_control_deps(std::move(control_deps_vector));
  return props;
}

std::pair<string, AttrValue> impl::AttrLiteralHelper(
    const std::pair<string, bool>& bool_attr) {
  AttrValue attr_value;