Returns delivery mode of the subscription that used to trigger digest
This is stored separately from actual subscriptionID because subscription
may change, but DigestDeliveryEvent should keep track of delivery mode
of the original subscription
Returns subscription thingID for this events digest
Returns:
getDeliveryMode
intgetDeliveryMode()
Returns delivery mode of the subscription that used to trigger digest
This is stored separately from actual subscriptionID because subscription
may change, but DigestDeliveryEvent should keep track of delivery mode
of the original subscription