public static function setDutchZipcode(\MUtil_Model_ModelAbstract $model, \Zend_Translate_Adapter $translator, $fieldName = 'grs_zipcode')
    {
        $model->set($fieldName,
                'size', 7,
                'description', $translator->_('E.g.: 0000 AA'),
                'filter', new \Gems_Filter_DutchZipcode()
                );
    }