How to convert a function to a lens getter?

Question

Probably related to What in lens should I use to build a read-only getter by index?

I'm looking for a variant of the lens function that allows me to build a Getter s a from an s -> a. Does something like this exist?

Answer 1

You are looking for to, which "build[s] an (index-preserving) Getter from an arbitrary Haskell function".