map -package:containers -package:bytestring -package:case-insensitive -package:incipit-base -package:conduit -package:basement -package:psqueues -package:regex-tdfa -package:invertible -package:text -is:exact -package:foldl -package:integration -package:hedgehog -package:unordered-containers package:charset

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