private function addExtraCostsToShipping(OrderExtraCostsInterface $orderExtraCosts, int $delivery, ?string $shipping_provider): void 	{ 		if ($shipping_provider && ($delivery == OrderModel::DELIVERY_SHIPPING)) { 			$amount = $orderExtraCosts->getAmount($this->order); 			$this->order->addAdditionalCostsToShippingPrice($amount); 		} 	}