/**
* Find a product by its id or return a 404 response
*
* @param int $id the product id
*
* @throws NotFoundHttpException
*
* @return ProductInterface
*/
protected function findProductOr404($id)
{
$product = $this->productRepository->findOneById($id);
if (!$product) {
throw new NotFoundHttpException(sprintf('Product with id %s could not be found.', $id));
}
$this->productBuilder->addMissingAssociations($product);
return $product;
}