protected function col_timecreated($row) {
        global $OUTPUT;
        $fdate = userdate($row->timecreated, '%d %b %Y, %H:%M');
        $url = new moodle_url('/admin/tool/profiling/index.php', array('runid' => $row->runid, 'listurl' => $row->url));
        return $OUTPUT->action_link($url, $fdate);
    }