map is:exact -package:text -package:bytestring -package:basement -package:ghc -package:case-insensitive -package:dense-linear-algebra -package:foldl -package:hedgehog -package:base-compat-batteries -package:invertible -package:insert-ordered-containers -package:dlist package:monoidal-containers
O(n) Transform this map by applying a function to every value.