map is:exact -package:text -package:base-compat-batteries -package:basement -package:dlist -package:monoidal-containers -package:base-prelude -package:insert-ordered-containers -package:bytestring -package:incipit-base -package:psqueues -package:os-string package:charset

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