map -package:containers -package:charset -package:conduit -package:aeson -is:exact -package:monoidal-containers -package:base-compat-batteries -package:os-string -package:dlist -package:psqueues -package:invertible -package:hedgehog -package:amazonka-core -package:blaze-html -package:basement -package:bytestring -package:unordered-containers -package:dense-linear-algebra -package:Cabal-syntax -is:exact is:module package:optics-core

This module defines mapping, which turns an Optic' k NoIx s a into an Optic' (MappedOptic k) NoIx (f s) (f a), in other words optic operating on values in a Functor.