map -package:containers -package:base-compat-batteries -package:foldl -package:base -package:imports -package:basement -package:invertible -package:case-insensitive -package:Cabal-syntax -package:os-string -package:conduit -package:regex-tdfa -package:ghc -is:exact package:charset

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