ReadSavedModelDebugInfoIfPresent(export_dir, &bundle->debug_info));
  TF_RETURN_IF_ERROR(LoadMetagraphIntoSession(
      session_options, bundle->meta_graph_def, &bundle->session));
  TF_RETURN_IF_ERROR(RestoreSession(run_options, bundle->meta_graph_def,
                                    export_dir, &bundle->session));
  return absl::OkStatus();
}

namespace {

// indicated metagraph.
// The recommended way to load a saved model is to call LoadSavedModel,
// which provides an already initialized Metagraph, Session, and DebugInfo.
Status RestoreSession(const RunOptions& run_options,
                      const MetaGraphDef& meta_graph, const string& export_dir,
                      std::unique_ptr<Session>* session);

// Initialize a session which wraps this metagraph.