/**
  * @param Product $product
  */
 private function saveRelated($product)
 {
     if ($product->isRelatedModified()) {
         foreach ($product->getRelated() as $related) {
             $this->getDb()->query("\n                    DELETE FROM product_related\n                    WHERE\n                        (product_id = :productId AND related_id = :relatedId)\n                        OR (related_id = :productId AND product_id = :relatedId)\n                    ", [':productId' => $product->getId(), ':relatedId' => $related->getId()]);
             $this->getDb()->query("INSERT INTO product_related VALUES (:productId, :relatedId), (:relatedId, :productId)", [':productId' => $product->getId(), ':relatedId' => $related]);
         }
     }
 }