map -package:containers -package:aeson -package:bytestring -is:exact -package:ghc -package:Cabal-syntax -package:invertible -package:basement -package:base-prelude -package:insert-ordered-containers -package:monoidal-containers -package:pipes -package:text -package:integration -package:os-string package:charset

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