bool NodeNameInValues(const std::map<TensorId, TensorId>& input_map,
                      const StringPiece& node_name) {
  for (auto iter = input_map.begin(); iter != input_map.end(); ++iter) {
    if (iter->second.first == node_name) return true;
  }
  return false;
}
bool NodeNameInValues(const std::map<TensorId, TensorId>& input_map,
                      const StringPiece& node_name) {
  for (auto iter = input_map.begin(); iter != input_map.end(); ++iter) {
    if (iter->second.first == node_name) return true;
  }
  return false;
}