&reachable_node_names, &variable_node_names);
  std::unordered_map<string, Tensor> variable_to_value_map;
  TF_RETURN_IF_ERROR(GetVariableNameToTensorMap(
      saved_model_bundle.session.get(), name_to_node_map, variable_node_names,
      &variable_to_value_map));
  // We copy the nodes in the same order they were in the original graph_def.
  for (const NodeDef& node : graph_def.node()) {