map is:exact -package:text -package:Cabal-syntax -package:basement -package:base-prelude -package:charset -package:base-compat -package:imports -package:base-compat-batteries -package:case-insensitive -package:hedgehog -package:foldl -package:incipit-base package:monoidal-containers
O(n) Transform this map by applying a function to every value.