public function getGuestAccessDeliveries()
    {
        $class = new core_kernel_classes_Class(DeliveryAssemblyService::CLASS_URI);

        return $class->searchInstances(
            array(
                DeliveryContainerService::PROPERTY_ACCESS_SETTINGS => DeliveryAssemblyService::PROPERTY_DELIVERY_GUEST_ACCESS
            ),
            array('recursive' => true)
        );
    }