/** * @param $city * @param $postalCode * @param null $memo * @param null $abbreviation * @return ZonePlan */ public static function registerZonePlan($city, $postalCode, $memo = null, $abbreviation = null) { $zonePlan = new ZonePlan(); $zonePlan->setCity($city); $zonePlan->setPostalCode($postalCode); $zonePlan->setMemo($memo); $zonePlan->setAbbreviation($abbreviation); return $zonePlan; }