map is:exact -package:text -package:dense-linear-algebra -package:base-prelude -package:case-insensitive -package:bytestring -package:containers -package:base-compat -package:aeson -package:insert-ordered-containers -package:Cabal-syntax -package:invertible -package:conduit package:charset

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