public function course_section_cm_list_item($course, &$completioninfo, cm_info $mod, $sectionreturn, $displayoptions = array()) {
        $output = '';
        if ($modulehtml = $this->course_section_cm($course, $completioninfo, $mod, $sectionreturn, $displayoptions)) {
            $modclasses = 'activity ' . $mod->modname . ' modtype_' . $mod->modname . ' ' . $mod->extraclasses;
            $output .= html_writer::tag('li', $modulehtml, array('class' => $modclasses, 'id' => 'module-' . $mod->id));
        }
        return $output;
    }