All CLA requirements met.

👋 looks good overall - thinking offhand, did you consider using this instead of the exact variable type?

👋

did you consider using this instead of the exact variable type?

I didn't, I guess I copied the style of the existing String#valueOf declaration.
Definitely willing to tweak as desired.

Nah, I think this is reasonable (I doubt someone will be making subclasses where this is useful etc)

Thanks @wemeetagain