checkFields example

'required' => (string) $field->getRequired(),  // intended string cast to keep compatibility                 'label' => $field->getLabel(),
                'class' => $field->getClass(),
                'value' => $field->getValue(),
                'error_msg' => $field->getErrorMsg(),
            ];
        }

        $this->translateForm($form, $this->_elements);

        if ($this->Request()->isPost()) {
            $this->checkFields();
        }

        $orderNumber = $this->Request()->getParam('sOrdernumber');

        if (empty($this->Request()->Submit) || \count($this->_errors)) {
            foreach ($this->_elements as $id => $element) {
                if ($element['name'] === 'sordernumber') {
                    try {
                        $this->get(OrderNumberValidatorInterface::class)->validate($orderNumber);

                        $product = Shopware()->Modules()->Articles()->sGetArticleNameByOrderNumber($orderNumber);