protected function development_libs_directories_warning($devlibdir) {

        if ($devlibdir) {
            $moreinfo = new moodle_url('/report/security/index.php');
            $warning = get_string('devlibdirpresent', 'core_admin', ['moreinfourl' => $moreinfo->out()]);
            return $this->warning($warning, 'error');

        } else {
            return '';
        }
    }