host_func_attrs["_device_ordinal"] = device_ordinal_temp_value;
  TF_CHECK_OK(FunctionDefToBodyHelper(
      *fld.Find("host_graph"), AttrSlice(&host_func_attrs), &fld, &host_fbody));
  Graph *host_graph = host_fbody->graph;
  Node *key_placeholder = nullptr, *sequencer = nullptr;
  for (Node *n : host_graph->nodes()) {
    if (n->type_string() == "Placeholder" &&
        absl::EndsWith(n->name(), "_key_placeholder")) {