code: private function getShippingCosts(array $entry)
      {
          $shippingCosts = $this->getShippingAmount($entry);
          $vatRateIdentifier = $this->getShippingCostsVatRateIdentifier($entry);
  
          $orderItem = new OrderItem();
          $orderItem->setType(OrderItem::TYPE_SHIPPING_COSTS);
          $orderItem->setQuantity(1.0);
          $orderItem->setName('ShippingCosts');
          $orderItem->setNumber('ShippingCosts');
          $orderItem->setPrice($shippingCosts);
          $orderItem->setVatRateIdentifier($vatRateIdentifier);
  
          return $orderItem;
      }
docs: @param array $entry
  
  @return OrderItem