public static function cm_updated(\core\event\course_module_updated $event) {
        if ($event->other['modulename'] !== 'glossary') {
            return;
        }
        // We do not know what changed exactly, so let's reset everything that might be affected.
        concept_cache::reset_course_muc($event->courseid);
        concept_cache::reset_global_muc();
    }