map -package:containers -package:Cabal-syntax -package:dlist -package:bytestring -package:dense-linear-algebra -package:incipit-base -package:monoidal-containers -package:os-string -package:basement -package:text is:exact package:unordered-containers

Transform this map by applying a function to every value.
Transform this set by applying a function to every value. The resulting set may be smaller than the source.
>>> HashSet.map show (HashSet.fromList [1,2,3])
HashSet.fromList ["1","2","3"]