public function down(): void 	{ 		Schema::table('orders', static function (Blueprint $table): void { 			$table->dropColumn('checkout_url'); 			$table->dropColumn('billable_address'); 			$table->dropColumn('billable_zip_code'); 			$table->dropColumn('billable_city'); 			$table->dropColumn('billable_country'); 		});  		Schema::table('order_items', static function (Blueprint $table): void { 			$table->dropForeign('order_items_item_id_foreign'); 			$table->foreign('item_id')->references('id')->on('product_variants')->onDelete('cascade'); 		}); 	}