Not being snarky, but I suggest starting by reading at least a little about traits? None of your questions are really about this library - it's just FromStr and an orphan rule.
To make it clear, I didn't want to be the snark either. Just wondered about the usual things like "locally detectable semantics" and so on. I still think `Library.method( argument )` wins over `argument.method()` for the simple reason that the former has `Library` explicitly mentioned. Also, `door.open()`, really? I think `strongman.open( door )` is just that much clearer, flexible and explicit.