ByUserGroup::getOrder

static function getOrder(SaleInternalsEntity $entity)
{
	if ($entity instanceof SaleShipment)
	{
		/** @var BitrixSaleShipmentCollection $collection */
		$collection = $entity->getCollection();

		/** @var BitrixSaleOrder $order */
		return $collection->getOrder();
	}
	elseif ($entity instanceof SaleOrder)
	{
		/** @var BitrixSaleOrder $order */
		return $entity;
	}

	return null;
}