map -package:containers -package:basement -package:conduit -is:exact -package:incipit-base -package:insert-ordered-containers -package:filepath -package:invertible is:exact -package:base-prelude -package:os-string -package:ghc -package:regex-tdfa -package:case-insensitive -package:text package:charset

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