message: Made sure the save/restore op is preserved during optimization
diff: @@ -32,6 +32,9 @@ GrapplerItem::GrapplerItem(const GrapplerItem& other, GraphDef&& graphDef) {
  fetch = other.fetch;
  init_ops = other.init_ops;
  expected_init_time = other.expected_init_time;
  + save_op = other.save_op;
  + restore_op = other.restore_op;
  + save_restore_loc_tensor = other.save_restore_loc_tensor;
  queue_runners = other.queue_runners;
  graph.Swap(&graphDef);
  }
  