map -package:vector -package:basement -package:conduit -package:case-insensitive -package:base-compat -package:foldl -package:bytestring -package:base-compat-batteries -package:monoidal-containers -package:filepath -package:ghc -package:invertible -package:insert-ordered-containers -package:regex-tdfa -package:containers package:charset

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