public function update_file_count($grade) {
        global $DB;

        $filefeedback = $this->get_file_feedback($grade->id);
        if ($filefeedback) {
            $filefeedback->numfiles = $this->count_files($grade->id, ASSIGNFEEDBACK_FILE_FILEAREA);
            return $DB->update_record('assignfeedback_file', $filefeedback);
        } else {
            $filefeedback = new stdClass();
            $filefeedback->numfiles = $this->count_files($grade->id, ASSIGNFEEDBACK_FILE_FILEAREA);
            $filefeedback->grade = $grade->id;
            $filefeedback->assignment = $this->assignment->get_instance()->id;
            return $DB->insert_record('assignfeedback_file', $filefeedback) > 0;
        }
    }