Status Encapsulator::Subgraph::MakeSequencingNode(const string& subgraph_name,
                                                  Graph* graph_out) {
  if (sequencer_ == nullptr) {
    NodeDef seq_def;
    // TODO(shikharagarwal): What source node should we use for errors?
    NodeDefBuilder builder(absl::StrCat(subgraph_name, "_sequencer"), "NoOp");
    builder.Attr(kXlaHostTransferSequencerAttr, subgraph_name);
    builder.Device(device_);

// have them, so we generate a name for subgraphs that are missing one here.
// Note: in TFLite, the first subgraph is the entry point, and in MLIR that
// represents TFLite, this entry point must be called "main"
std::string SubgraphName(bool set_implicit_main_func, unsigned index,
                         const tflite::SubGraphT& subgraph) {
  if (index == 0 && set_implicit_main_func) {
    return "main";
  }
  if (subgraph.name.empty()) {