map -package:containers -package:insert-ordered-containers -package:basement -is:exact -package:bytestring -package:case-insensitive -is:exact -package:os-string -package:foldl -package:base-compat-batteries -package:regex-tdfa -package:base-compat -package:ghc -is:exact package:charset

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