EXPECT_EQ(0, TF_OperationNumControlInputs(scalar));
  EXPECT_EQ(0, TF_OperationGetControlInputs(scalar, control_ops, 100));
  EXPECT_EQ(0, TF_OperationNumControlOutputs(scalar));
  EXPECT_EQ(0, TF_OperationGetControlOutputs(scalar, control_ops, 100));

  EXPECT_EQ(0, TF_OperationNumControlInputs(feed));
  EXPECT_EQ(0, TF_OperationGetControlInputs(feed, control_ops, 100));
  EXPECT_EQ(0, TF_OperationNumControlOutputs(feed));

// TF_OperationNumControlInputs(oper)).  Returns the number of control
// inputs (should match TF_OperationNumControlInputs(oper)).
TF_CAPI_EXPORT extern int TF_OperationGetControlInputs(
    TF_Operation* oper, TF_Operation** control_inputs, int max_control_inputs);

// Get the number of operations that have `*oper` as a control input.

  int count = 0;
  for (const auto* edge : oper->node.in_edges()) {
    if (edge->IsControlEdge() && !edge->src()->IsSource()) {
      ++count;
    }
  }
  return count;
}

int TF_OperationGetControlInputs(TF_Operation* oper,
                                 TF_Operation** control_inputs,
                                 int max_control_inputs) {
  int count = 0;
  for (const auto* edge : oper->node.in_edges()) {