private function getVatRateIdentifier(array $entry)
    {
        /**
         * @var null|Tax $taxModel
         */
        $taxModel = $this->taxRepository->findOneBy(['tax' => $entry['taxRate']]);

        if (null === $taxModel) {
            throw new InvalidArgumentException('no matching tax rate found - ' . $entry['taxRate']);
        }

        $entry['taxId'] = $taxModel->getId();

        $vatRateIdentity = $this->identityService->findOneBy([
            'adapterIdentifier' => (string) $entry['taxId'],
            'adapterName' => ShopwareAdapter::NAME,
            'objectType' => VatRate::TYPE,
        ]);

        if (null === $vatRateIdentity) {
            throw new NotFoundException('missing vat rate identity for taxId ' . $entry['taxId']);
        }

        return $vatRateIdentity->getObjectIdentifier();
    }
private function getVatRateIdentifier(array $entry)
    {
        /**
         * @var null|Tax $taxModel
         */
        $taxModel = $this->taxRepository->findOneBy(['tax' => $entry['taxRate']]);

        if (null === $taxModel) {
            throw new InvalidArgumentException('no matching tax rate found - ' . $entry['taxRate']);
        }

        $entry['taxId'] = $taxModel->getId();

        $vatRateIdentity = $this->identityService->findOneBy([
            'adapterIdentifier' => (string) $entry['taxId'],
            'adapterName' => ShopwareAdapter::NAME,
            'objectType' => VatRate::TYPE,
        ]);

        if (null === $vatRateIdentity) {
            throw new NotFoundException('missing vat rate identity for taxId ' . $entry['taxId']);
        }

        return $vatRateIdentity->getObjectIdentifier();
    }
@param array $entry

@return null|string