const ng::level::TYPE current_type = create_engine_.current_level_type();
    std::vector<bool> filtered = std::transform(
        create_engine_.get_levels_by_type_unfiltered(current_type).begin(),
        create_engine_.get_levels_by_type(current_type).end(), create_engine_.get_levels_by_type(current_type).begin(),
        std::back_inserter(filtered), std::equal<std::shared_ptr<ng::level>>());

    tlistbox& list = find_widget<tlistbox>(&window, "games_list", false).set_row_shown(filtered);