Get Nodes from Stairs

[Dayiz]

Dear Community,

I'm currently writing an AddOn which checks for tilted elements (eg. anything that isn't 0°, 90°, 180° etc) and I need to expand the functionality to stairs. 

But I don't find any useful information in the StairType (https://archicadapi.Graphisoft.com/documentation/api_stairtype) thats relates to start and end point of the stairs or something like an angle in the Project. Same goes for the other 3 stair types.

So i was wondering: Walls and Beams have begCoord and endCoord, Column has axisRotationAngle, but i can't find any useful information for stairs. Am I just blind?

And if not, is there a way to access the points (red circles in the picture) from the highlighted line?

Thanks for any help.

Kind Regards

Dayiz