public function get_grade_publishing_url() {
        $url = $this->get_export_url();
        $output =  html_writer::start_div();
        $output .= html_writer::tag('p', get_string('gradepublishinglink', 'grades', html_writer::link($url, $url)));
        $output .=  html_writer::end_div();
        return $output;
    }