// GraphDefs, return the Graph generated in LoadSavedModel().
  TF_ImportGraphDefOptions* import_opts = TF_NewImportGraphDefOptions();
  TF_ImportGraphDefResults results;
  GraphImportGraphDefLocked(graph, bundle.meta_graph_def.graph_def(),
                            import_opts, &results, status);
  TF_DeleteImportGraphDefOptions(import_opts);
  if (!status->status.ok()) return nullptr;

  if (meta_graph_def != nullptr) {