map -package:containers -package:base -package:insert-ordered-containers -package:incipit-base -package:dlist -package:basement -package:filepath -package:hedgehog -package:psqueues -package:regex-tdfa -package:invertible -package:case-insensitive -package:base-compat -package:base-compat-batteries -package:ghc is:exact package:charset

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