}

void TF_GraphVersions(TF_Graph* graph, TF_Buffer* output_version_def,
                      TF_Status* status) {
  VersionDef versions;
  {
    mutex_lock l(graph->mu);
    versions = graph->graph.versions();
  }
  status->status = MessageToBuffer(versions, output_version_def);
}

TF_ImportGraphDefOptions* TF_NewImportGraphDefOptions() {