function_library->ReachableDefinitions(graph_def).ListFunctionNames()) {
    const FunctionDef* func_def = function_library->Find(func_name);
    std::unique_ptr<FunctionBody> func_body;
    absl::Status status = FunctionDefToBodyHelper(
        *func_def, AttrSlice(&func_def->attr()), function_library, &func_body);
    // This is not expected to happen in practice
    if (!status.ok()) {
      LOG(ERROR) << "Failed to parse " << func_name << ": "