for (const auto& fn_name : fn_names) {
    TF_RETURN_IF_ERROR(importer.ConvertLibFunction(fn_name));
  }
  TF_RETURN_IF_ERROR(importer.ConvertDeferredFunctions());

  if (!saved_model->meta_graph_def().has_object_graph_def()) {
    return errors::InvalidArgument(
        "SavedModel does not have an object graph. Please use TF2.");
  }
  auto& object_graph = saved_model->meta_graph_def().object_graph_def();