a <a href="#Constant_expressions">constant expression</a>,
a <a href="#Conversions">conversion</a> with a result that is a constant, or
the result value of some built-in functions such as
<code>unsafe.Sizeof</code> applied to any value,
<code>cap</code> or <code>len</code> applied to
<a href="#Length_and_capacity">some expressions</a>,
<code>real</code> and <code>imag</code> applied to a complex constant

  GraphImportGraphDefLocked(graph, def, options, &results, status);
  DCHECK_EQ(results.return_tensors.size(), num_return_outputs);
  memcpy(return_outputs, results.return_tensors.data(),
         num_return_outputs * sizeof(TF_Output));
}

void TF_GraphImportGraphDef(TF_Graph* graph, const TF_Buffer* graph_def,
                            const TF_ImportGraphDefOptions* options,
                            TF_Status* status) {