map -package:containers -package:Cabal-syntax -package:insert-ordered-containers -package:monoidal-containers -package:dense-linear-algebra -package:foldl -package:case-insensitive -package:base-prelude -package:integration -package:bytestring -package:basement -package:os-string -package:base package:charset

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