Function FindPtrOrNull

tensorflow/core/lib/gtl/map_util.h:67–75

// to a NULL value.
template <class Collection>
typename Collection::value_type::second_type FindPtrOrNull(
    const Collection& collection,
    const typename Collection::value_type::first_type& key) {
  typename Collection::const_iterator it = collection.find(key);
  if (it == collection.end()) {
    return typename Collection::value_type::second_type();
  }
  return it->second;
}

// Returns a const reference to the value associated with the given key if it
// exists, otherwise returns a const reference to the provided default value.