Questions about updating an addon

[mathuin]

There is an addon I miss enough to use it as a stepping stone towards learning Mono.  I got some of the errors fixed, but am not sure how to deal with these remaining errors.

All of these errors result from changes in the API:  something was somewhere and now it's not.  I have found a number of API sites, but no translation tables which make it easy to see what moved when.

Here are the actual messages:

    ProbeControlRoom.cs(189,21): error CS1061: Type `FlightEVA' does not contain a definition for `DisableInterface' and no extension method `DisableInterface' of type `FlightEVA' could be found. Are you missing an assembly reference?
    ProbeControlRoom.cs(194,32): error CS1061: Type `Vessel' does not contain a definition for `SetActiveInternalPart' and no extension method `SetActiveInternalPart' of type `Vessel' could be found. Are you missing an assembly reference?
    ProbeControlRoomUI.cs(66,21): error CS0117: `GameSettings' does not contain a definition for `UI_SIZE'

If someone has a Rosetta stone for old API calls where I can find these answers for myself, that'd be best.  Alternatively, if you guys can tell me where these three are from, I can at least move forward with learning more about KSP's mod ecosystem.  Thanks in advance!

Jack.