public function deleting(Product $product): void 	{ 		foreach ($product->productFilters as $product_filter) { 			$product_filter->delete(); 		}  		foreach ($product->variants as $variant) { 			$variant->delete(); 		}  		foreach ($product->prices as $price) { 			$price->delete(); 		}  		if ($product->discountOrderItem()->exists()) { 			$product->discountOrderItem->delete(); 		} 	}