map is:exact -package:conduit -package:containers -package:bytestring -package:dense-linear-algebra -package:psqueues -package:invertible -package:Cabal-syntax -package:basement -package:regex-tdfa -package:imports -package:incipit-base -package:dlist -package:base package:charset

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