Manager::getDeliveryRequestHandlerByRequestId

static function getDeliveryRequestHandlerByRequestId($requestId)
{
	if (intval($requestId) <= 0)
		return null;

	if (!($requestFields = RequestTable::getById($requestId)->fetch()))
		return null;

	if (intval($requestFields['DELIVERY_ID']) <= 0)
		return null;

	return self::getDeliveryRequestHandlerByDeliveryId($requestFields['DELIVERY_ID']);
}