GraphImportGraphDefLocked(graph, *graph_def_ptr, options, results, status);
  if (!status->status.ok()) {
    delete results;
    return nullptr;
  }
  return results;
}

void TF_GraphImportGraphDefWithReturnOutputs(
    TF_Graph* graph, const TF_Buffer* graph_def,
    const TF_ImportGraphDefOptions* options, TF_Output* return_outputs,
    int num_return_outputs, TF_Status* status) {

*   Speed up matrix * vector multiplication and matrix * matrix with unknown
    shapes.
*   C API: Graph imports now support input remapping, control dependencies, and
    returning imported nodes (see `TF_GraphImportGraphDefWithReturnOutputs()`)
*   Multiple C++ API updates.
*   Multiple TensorBoard updates including:
    *   Users can now view image summaries at various sampled steps (instead of
        just the last step).