map -package:containers -package:bytestring -package:foldl -package:invertible -package:insert-ordered-containers -package:blaze-html -package:base-compat-batteries -is:exact -package:os-string -package:ghc -is:exact -package:basement -package:case-insensitive -package:conduit -package:monoidal-containers -package:vector package:charset

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