public function setValue($photographer = '', $editor = '')
    {
        $this->photographer = $photographer;
        $this->editor = $editor;

        if ($photographer == '' && $editor != '') {
            $photographer = ' ';
        }

        if ($editor == '') {
            parent::setValue($photographer);
        } else {
            parent::setValue($photographer . chr(0x00) . $editor);
        }
    }