Documentation - deprecated items

For running projects I am using 2019R1.1
Since it’s the first time I need the Serial - control, I checked the documentation about it and find that for example the DataAvailable event has been deprecated and replaced by SerialConnection.DataReceived since 2019r2. Understood, but I am just not using 2019r2 yet, eh… which is still in beta as far as I am concerned.
Q: Where can I find the documentation of the Serial control as is in 2019r1.1 ?

Aha … I have to switch to the IDE-build-in language reference.

I’ve fixed this so you can get to the correct page in the online docs.