map is:exact -package:Cabal-syntax -package:basement -package:containers -package:monoidal-containers -package:filepath -package:dlist -package:foldl -package:invertible -package:charset -package:aeson -package:psqueues -package:os-string -package:base-compat -package:vector -package:unordered-containers package:vector-stream

Map a function over a Stream