public function get_overall_feedback_attachments() {

        if ($this->workshop->overallfeedbackmode == 0) {
            return false;
        }

        if ($this->workshop->overallfeedbackfiles == 0) {
            return false;
        }

        if (empty($this->feedbackauthorattachment)) {
            return array();
        }

        $attachments = array();
        $fs = get_file_storage();
        $files = $fs->get_area_files($this->workshop->context->id, 'mod_workshop', 'overallfeedback_attachment', $this->id);
        foreach ($files as $file) {
            if ($file->is_directory()) {
                continue;
            }
            $filepath = $file->get_filepath();
            $filename = $file->get_filename();
            $fileurl = moodle_url::make_pluginfile_url($this->workshop->context->id, 'mod_workshop',
                'overallfeedback_attachment', $this->id, $filepath, $filename, true);
            $previewurl = new moodle_url(moodle_url::make_pluginfile_url($this->workshop->context->id, 'mod_workshop',
                'overallfeedback_attachment', $this->id, $filepath, $filename, false), array('preview' => 'bigthumb'));
            $attachments[] = (object)array(
                'filepath' => $filepath,
                'filename' => $filename,
                'fileurl' => $fileurl,
                'previewurl' => $previewurl,
                'mimetype' => $file->get_mimetype(),

            );
        }

        return $attachments;
    }