public function synchronizeVariations(ProductInterface $product, ArrayCollection $variations = null)
{
$this->synchronizeVariationsProduct($product, $variations);
$this->synchronizeVariationsDeliveries($product, $variations);
$this->synchronizeVariationsCategories($product, $variations);
$this->synchronizeVariationsPackages($product, $variations);
$this->synchronizeVariationsCollections($product, $variations);
}