map is:exact -package:text -package:conduit -package:base-prelude -package:case-insensitive -package:insert-ordered-containers -package:invertible -package:charset -package:bytestring -package:Cabal-syntax -package:containers -package:base-compat -package:dense-linear-algebra package:monoidal-containers
O(n) Transform this map by applying a function to every value.