map -package:containers -package:insert-ordered-containers -package:dense-linear-algebra -package:invertible -package:bytestring -package:monoidal-containers -package:filepath -package:ghc -package:foldl -package:psqueues -package:case-insensitive -package:conduit package:charset

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