filterUrl example

$hrefs = [];

        foreach ($shops as $languageShop) {
            $shop = $this->getDetachedShop($languageShop['id']);

            $config->setShop($shop);

            $href = new HrefLang();
            $href->setShopId($languageShop['id']);
            $href->setLocale($languageShop['locale']);
            $routingContext = $this->getContext($shop, $config);
            $href->setLink($this->filterUrl((string) $this->rewriteRouter->assemble($parameters, $routingContext), $parameters));

            if (!$config->get('hrefLangCountry')) {
                $href->setLocale(explode('-', $languageShop['locale'])[0]);
            }

            if ((int) $languageShop['id'] === $config->get('hrefLangDefaultShop')) {
                $href->setLocale('x-default');
            }

            if ($this->config->get('hrefLangJustSeoUrl') && !$this->isSeoUrl($parameters, $href->getLink(), $routingContext)) {
                continue;
            }