ImportOneCPackage::onBeforeShipmentCollectionModify

protected function onBeforeShipmentCollectionModify(ExchangeEntityOrderImport $orderImport, $items)
    {
        $result = new Result();

        $shipmentItems = array();

        /** @var Order $order */
        $order = $orderImport->getEntity();
        if(empty($order))
            throw new ArgumentNullException('Order');

        foreach($items as $item)
        {
            switch($item->getOwnerTypeId())
            {
                case static::getShipmentEntityTypeId():
                    $params = $item->getFieldValues();
                    $fields = $params['TRAITS'];

                    if(!empty($fields['ID']))
                        $shipmentItems[] = $fields['ID'];
                    break;
            }
        }

        /** @var BitrixSaleShipment $shipment */
        $shipmentList = array();
        $shipmentCollection = $order->getShipmentCollection();
        foreach($shipmentCollection as $shipment)
        {
            if($shipment->isSystem())
                continue;

            if(!in_array($shipment->getId(), $shipmentItems))
                $shipmentList[$shipment->getId()] = $shipment;
        }

        if(!empty($shipmentList))
        {
            foreach($shipmentList as $id=>$shipment)
            {
                $typeId = $this->resolveEntityTypeId($shipment);

                /** @var ExchangeEntityShipmentImport $item */

			$item = $this->entityFactoryCreate($typeId);
                ManagerImport::configure($item);
                static::load($item, array('ID'=>$id), $order);
			$collision = $item->getLoadedCollision();

			$collision->resolve($item);
                if(!$item->hasCollisionErrors())
                {
                    $result = $item->delete();
                }
                else
                {
				$item->setCollisions(EntityCollisionType::BeforeUpdateShipmentDeletedError, $item->getParentEntity());
                }

                $collisions = $item->getCollisions();
                $item->markedEntityCollisions($collisions);
            }
        }

        return $result;
    }