return std::make_unique<RecursiveCompilabilityChecker>(op_filter_,
                                                            device_type_);
  }

  FunctionLibraryRuntime* GetFunctionLibraryRuntime() {
    OptimizerOptions opts;
    pflr_ = std::make_unique<ProcessFunctionLibraryRuntime>(
        nullptr, Env::Default(), /*config=*/nullptr, TF_GRAPH_DEF_VERSION,
        flib_def_.get(), opts);