public function download() {
        $filename = 'logs_' . userdate(time(), get_string('backupnameformat', 'langconfig'), 99, false);
        if ($this->course->id !== SITEID) {
            $courseshortname = format_string($this->course->shortname, true,
                    array('context' => context_course::instance($this->course->id)));
            $filename = clean_filename('logs_' . $courseshortname . '_' . userdate(time(),
                    get_string('backupnameformat', 'langconfig'), 99, false));
        }
        $this->tablelog->is_downloading($this->logformat, $filename);
        $this->tablelog->out($this->perpage, false);
    }