fetchLanguageChains example

if (empty($templates)) {
            return;
        }

        $route = $this->seoUrlRouteRegistry->findByRouteName($routeName);
        if ($route === null) {
            throw new \RuntimeException(sprintf('Route by name %s not found', $routeName));
        }

        $context = Context::createDefaultContext();

        $languageChains = $this->fetchLanguageChains($context);

        $criteria = new Criteria();

        if (Feature::isActive('v6.6.0.0')) {
            $criteria->addFilter(new NandFilter([new EqualsFilter('typeId', Defaults::SALES_CHANNEL_TYPE_API)]));
        }

        $salesChannels = $this->salesChannelRepository->search($criteria, $context)->getEntities();

        foreach ($templates as $config) {
            $template = $config['template'];