map is:exact -package:text -package:charset -package:blaze-html -package:containers -package:aeson -package:incipit-base -package:base-compat -package:base-compat-batteries -package:filepath -package:base-prelude -package:case-insensitive -package:insert-ordered-containers package:monoidal-containers
O(n) Transform this map by applying a function to every value.