public function remove_success(moodle_url $url) {
        $html = $this->output->notification(get_string('communityremoved', 'hub'),
                    'notifysuccess');
        $continuebutton = new single_button($url,
                        get_string('continue', 'block_community'));
        $html .= html_writer::tag('div', $this->output->render($continuebutton),
                array('class' => 'continuebutton'));
        return $html;
    }