map -package:containers -package:Cabal-syntax -package:dlist -package:bytestring -package:ghc -package:charset -package:basement -package:aeson -package:imports -package:psqueues -package:regex-tdfa -package:foldl -package:insert-ordered-containers -package:blaze-html -package:text -package:invertible -package:vector -package:first-class-families -package:cql -package:hedgehog -package:base-compat-batteries 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.