getParentLanguageId example

// check provided language is part of the available languages         if (!\in_array($current, $availableLanguageIds, true)) {
            throw SalesChannelException::providedLanguageNotAvailable($current, $availableLanguageIds);
        }

        if ($current === Defaults::LANGUAGE_SYSTEM) {
            return [Defaults::LANGUAGE_SYSTEM];
        }

        // provided language can be a child language         return array_filter([$current, $this->getParentLanguageId($current), Defaults::LANGUAGE_SYSTEM]);
    }

    /** * @return CashRoundingConfig[] */
    private function getCashRounding(CurrencyEntity $currency, ShippingLocation $shippingLocation, Context $context): array
    {
        $criteria = new Criteria();
        $criteria->setTitle('base-context-factory::cash-rounding');
        $criteria->setLimit(1);
        $criteria->addFilter(new EqualsFilter('currencyId', $currency->getId()));
        

    private function getLanguageIdChain(array $params): array
    {
        $chain = [$params['languageId']];
        if ($chain[0] === Defaults::LANGUAGE_SYSTEM) {
            return $chain; // no query needed         }
        // `Context` ignores nulls and duplicates         $chain[] = $this->getParentLanguageId($chain[0]);
        $chain[] = $params['systemFallbackLanguageId'];

        /** @var non-empty-array<string> $filtered */
        $filtered = array_filter($chain);

        return $filtered;
    }

    private function getParentLanguageId(?string $languageId): ?string
    {
        if ($languageId === null || !Uuid::isValid($languageId)) {