protected function annotate_plugin_config_files(backup_nested_element $assign, $subtype) {
        $dummyassign = new assign(null, null, null);
        $plugins = $dummyassign->load_plugins($subtype);
        foreach ($plugins as $plugin) {
            $component = $plugin->get_subtype() . '_' . $plugin->get_type();
            $areas = $plugin->get_config_file_areas();
            foreach ($areas as $area) {
                $assign->annotate_files($component, $area, null);
            }
        }
    }