}

  // Returns whether or not we found a valid checkpoint when loading the
  // package.
  bool HasCheckpoint() { return has_checkpoint_; }

  // Returns the path to the variables file.
  const std::string GetVariablesFilepath() const { return variables_filepath_; }

 private:
  SavedModel saved_model_proto_;
  TrackableObjectGraph trackable_object_graph_;
  std::unique_ptr<tensorflow::BundleReader> variable_reader_;