Documentation not clear about MqttSubscription.retainHandling

[grillsoftware]

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• [ ] Bug exists Release Version 1.2.5 ( Master Branch)
• [ ] Bug exists in MQTTv3 Client on Snapshot Version 1.2.6-SNAPSHOT (Develop Branch)
• [X] Bug exists in MQTTv5 Client on Snapshot Version 1.2.6-SNAPSHOT (Develop Branch)

The javadoc of the method validateRetainHandling seems a copy of the method validateQos.

I'm trying to find what the values for MqttSubscription.retainHandling means.

My goal is not to process retained messages on subscription. Since retainHandling defaults to 0 I'm guessing 0 means to handle the retained message. What does 1 and 2 means?

[grillsoftware]

Found this enum in the MQTTnet library:

SendAtSubscribe = 0, SendAtSubscribeIfNewSubscriptionOnly = 1, DoNotSendOnSubscribe = 2

In case someone is having the same issue.