You got me to look up 'generics'.

I like the idea, feels very pythonic ironically. And I suppose if you don't want the generic, I imagine there is probably some subclass of that which is more restrictive.

Anyway, as a developer I love when people do this. As a developer this sounds like a nightmare to maintain. My coworkers have told me to limit the numbers of 'what ifs' and just roll with it.