map -package:containers -package:insert-ordered-containers -package:dense-linear-algebra -package:basement -package:base-compat-batteries -package:regex-tdfa -package:invertible -package:blaze-html -package:foldl -package:base-compat -package:filepath -package:os-string package:charset

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