Petrovich::middlename

public function middlename($middlename, $case = Petrovich::CASE_NOMENATIVE) {
//		if(empty($middlename))
//			throw new Exception('Middlename cannot be empty.');

	if ($case === Petrovich::CASE_NOMENATIVE) {
		return $middlename;
	}

	return $this->inflect($middlename,$case,__FUNCTION__);
}