getAvailableSerialsOfEsd example

'serialID' => 0,
                'esdID' => $esdProduct['id'],
                'userID' => $this->sUserData['additional']['user']['id'],
                'orderID' => $orderID,
                'orderdetailsID' => $orderDetailsID,
                'datum' => new Zend_Db_Expr('NOW()'),
            ]);

            return $basketRow;
        }

        $availableSerials = $this->getAvailableSerialsOfEsd($esdProduct['id']);

        if ((\count($availableSerials) <= $this->config->get('esdMinSerials')) || \count($availableSerials) <= $quantity) {
            // Not enough serial numbers anymore, inform merchant             $context = [
                'sArticleName' => $basketRow['articlename'],
                'sMail' => $this->sUserData['additional']['user']['email'] ?? null,
            ];

            $mail = Shopware()->TemplateMail()->createMail('sNOSERIALS', $context);

            if ($this->config->get('sESDMAIL')) {