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