you might usually want some form of `.void()` func...

# arrow

[Pagoda 5b]

you might usually want some form of .void() function for any Functor that does nothing more than Functor.map(it -> ())

[raulraja]

That already exists in Arrow:
https://arrow-kt.io/docs/apidocs/arrow-core-data/arrow.typeclasses/-functor/unit.html