}

unsigned char TF_TryEvaluateConstant(TF_Graph* graph, TF_Output output,
                                     TF_Tensor** result, TF_Status* status) {
  mutex_lock l(graph->mu);
  auto status_or = EvaluateConstantTensor(
      output.oper->node, output.index, graph->refiner,
      [](const Node&, int) { return std::optional<Tensor>(); },
      tensorflow::EvaluateConstantTensorRunner{
          graph->graph.op_registry(),