public function postalcode($name, $value = null, $options = []) { if (isset($options['class'])) { $options['class'] .= ' postalcodeNL'; } else { $options['class'] = 'postalcodeNL'; } $options = $this->converter->convert(Helper::getFormAttribute($name)) + $options; return parent::text($name, $value, $options); }