public function precheck_notices($results) {
        $output = html_writer::start_tag('div', array('class' => 'restore-precheck-notices'));
        if (array_key_exists('errors', $results)) {
            foreach ($results['errors'] as $error) {
                $output .= $this->output->notification($error);
            }
        }
        if (array_key_exists('warnings', $results)) {
            foreach ($results['warnings'] as $warning) {
                $output .= $this->output->notification($warning, 'notifyproblem');
            }
        }
        return $output.html_writer::end_tag('div');
    }