private function getProductSorterLoadUrl(Category $category)
    {
        $url = null;

        $storeId = $this->getStoreId($category);

        if ($storeId) {
            $urlParams = ['ajax' => true, 'store' => $storeId];
            $url = $this->urlBuilder->getUrl('virtualcategory/category_virtual/preview', $urlParams);
        }

        return $url;
    }