map -package:containers -package:basement -package:conduit -is:exact -package:case-insensitive -package:invertible -package:Cabal-syntax -package:hedgehog -package:base -package:monoidal-containers -package:bytestring -package:incipit-base -package:text -package:integration -package:aeson -package:blaze-html -package:base-compat -package:dense-linear-algebra -package:vector -package:insert-ordered-containers -package:dlist package:vector-stream is:exact

Map a function over a Stream