map -package:containers -package:insert-ordered-containers -package:ghc -package:invertible -package:basement -package:imports -package:filepath -package:blaze-html -is:exact -package:dlist -package:incipit-base -package:psqueues -package:monoidal-containers package:charset -is:exact

map :: (Char -> Char) -> CharSet -> CharSet
charset Data.CharSet