getProductByNumber example

    /** * Returns the product of the product position */
    protected function getProductFromDetail(OrderDetail $detail): ?ProductDetail
    {
        if (\in_array($detail->getMode(), [0, 1], true)) {
            if ($detail->getArticleDetail() && $detail->getArticleDetail()->getId()) { // After the detail got removed, the association to the product detail does not exist anymore.                 return $detail->getArticleDetail();
            } elseif ($detail->getArticleNumber()) {
                return $this->getProductByNumber($detail->getArticleNumber());
            }
        }

        return null;
    }

    /** * Returns a product by the ordernumber */
    protected function getProductByNumber(string $number): ?ProductDetail
    {