map -package:containers -package:basement -package:psqueues -package:aeson -package:blaze-html -package:ghc -package:invertible -package:conduit -package:monoidal-containers -package:case-insensitive -package:base-compat -package:bytestring -package:unordered-containers -package:base package:charset

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