protected function overall_feedback(workshop_assessment $assessment) {

        $content = $assessment->get_overall_feedback_content();

        if ($content === false) {
            return '';
        }

        $o = '';

        if (!is_null($content)) {
            $o .= $this->output->container($content, 'content');
        }

        $attachments = $assessment->get_overall_feedback_attachments();

        if (!empty($attachments)) {
            $o .= $this->output->container_start('attachments');
            $images = '';
            $files = '';
            foreach ($attachments as $attachment) {
                $icon = $this->output->pix_icon(file_file_icon($attachment), get_mimetype_description($attachment),
                    'moodle', array('class' => 'icon'));
                $link = html_writer::link($attachment->fileurl, $icon.' '.substr($attachment->filepath.$attachment->filename, 1));
                if (file_mimetype_in_typegroup($attachment->mimetype, 'web_image')) {
                    $preview = html_writer::empty_tag('img', array('src' => $attachment->previewurl, 'alt' => '', 'class' => 'preview'));
                    $preview = html_writer::tag('a', $preview, array('href' => $attachment->fileurl));
                    $images .= $this->output->container($preview);
                } else {
                    $files .= html_writer::tag('li', $link, array('class' => $attachment->mimetype));
                }
            }
            if ($images) {
                $images = $this->output->container($images, 'images');
            }

            if ($files) {
                $files = html_writer::tag('ul', $files, array('class' => 'files'));
            }

            $o .= $images.$files;
            $o .= $this->output->container_end();
        }

        if ($o === '') {
            return '';
        }

        $o = $this->output->box($o, 'overallfeedback');
        $o = print_collapsible_region($o, 'overall-feedback-wrapper', uniqid('workshop-overall-feedback'),
            get_string('overallfeedback', 'workshop'), '', false, true);

        return $o;
    }