public function onDeliveryUpdated(DeliveryUpdatedEvent $event)
    {
        $data = $event->jsonSerialize();
        $deliveryData = !empty($data['data']) ? $data['data'] : [];
        $delivery = $this->getResource($event->getDeliveryUri());
        if (isset($deliveryData[ProctorService::ACCESSIBLE_PROCTOR]) && !$deliveryData[ProctorService::ACCESSIBLE_PROCTOR]) {
            $delivery->editPropertyValues($this->getProperty(ProctorService::ACCESSIBLE_PROCTOR), ProctorService::ACCESSIBLE_PROCTOR_DISABLED);
        }
    }