namespace tensorflow {
namespace saved_model {

std::string GetWriteVersion(const SavedModel& saved_model) {
  if (saved_model.meta_graphs_size() == 1 &&
      saved_model.meta_graphs()[0].has_object_graph_def()) {
    return "2";
  }
  return "1";
}

std::set<std::string> GetMapKeys(
    const ::google::protobuf::Map<std::string, ::tensorflow::TensorProto>& map) {
  std::set<std::string> keys;