protected function backup_detail_select($label, $name, $options, $selected = '', $nothing = false, array $attributes = array(), $description = null) {
        if (!empty ($description)) {
            $description = html_writer::tag('span', $description, array('class' => 'description'));
        } else {
            $description = '';
        }
        return $this->backup_detail_pair($label, html_writer::select($options, $name, $selected, false, $attributes).$description);
    }