ShipmentImport::update

public function update(array $params)
    {
    	$result = new SaleResult();

	if(!$this->isLoadedParentEntity())
	{
		$result->addError(new Error(GetMessage('SALE_EXCHANGE_ENTITY_SHIPMENT_ORDER_IS_NOT_LOADED_ERROR'),'ORDER_IS_NOT_LOADED_ERROR'));
		return $result;
	}

	/** @var Shipment $shipment */
        $shipment = $this->getEntity();

        $parentEntity = $this->getParentEntity();

        $criterion = $this->getCurrentCriterion($this->getEntity());

        $fields = $params['TRAITS'];
        if($criterion->equals($fields))
        {
            $basket = $parentEntity->getBasket();
            $result = $this->fillShipmentItems($shipment, $basket, $params);
            if(!$result->isSuccess())
            {
                return $result;
            }
        }

        $result = $shipment->setFields($fields);

        return $result;
    }