TF_Buffer* output_version_def,
                                            TF_Status* status);

// TF_ImportGraphDefOptions holds options that can be passed to
// TF_GraphImportGraphDef.
typedef struct TF_ImportGraphDefOptions TF_ImportGraphDefOptions;

TF_CAPI_EXPORT extern TF_ImportGraphDefOptions* TF_NewImportGraphDefOptions(
    void);

  TF_DeleteGraph(graph);
  graph = TF_NewGraph();
  TF_ImportGraphDefOptions* opts = TF_NewImportGraphDefOptions();
  TF_ImportGraphDefOptionsSetPrefix(opts, "imported");
  TF_GraphImportGraphDef(graph, graph_def, opts, s);
  ASSERT_EQ(TF_OK, TF_GetCode(s)) << TF_Message(s);

  TF_Operation* scalar = TF_GraphOperationByName(graph, "imported/scalar");