const std::vector<string>& output_names,
               bool expect_failure = false) {
    ASSERT_EQ(func_, nullptr);
    const char** output_names_ptr = ToArray(output_names);
    func_ = TF_GraphToFunction(func_graph_, func_name_, false, num_opers,
                               num_opers == -1 ? nullptr : opers.data(),
                               inputs.size(), inputs.data(), outputs.size(),

    const TF_FunctionOptions* opts, const char* description, TF_Status* status);

// Similar to TF_GraphToFunction but allows specifying control outputs of the
// function.
//
//  The arguments of TF_GraphToFunction have the same meaning, but the new
//  arguments are as follows:
//
//    ncontrol_outputs: Number of control outputs of the function.