I was playing with the AHQA lib and in the Activity module for it I was not allowed to the the following item; those that are commented I received a compile error. I am running 2.50.
The ones that are commented out, shown above, give me an error "not supported" when I compile the code, hence, why I commented them out. I have read your post prior to making this initial post and wonder why I get the errors, from Application Label to CanInstall... error out. What I have in the code is what you saw which is what came with the zip file.