protected function getSubPart(
        /*# string */ $name,
        /*# string */ $placeholder,
        $data
    )/*# : string */ {
        list(, $second) = explode('.', $name, 2);

        $arr = (array) $data;
        if (isset($arr[$second])) {
            return $arr[$second];
        }

        return $placeholder;
    }