map -package:containers -package:conduit -package:blaze-html -package:Cabal-syntax -package:base -package:monoidal-containers -package:hedgehog -package:basement -package:regex-tdfa -package:invertible -package:os-string -package:unordered-containers -package:aeson -package:case-insensitive -package:psqueues -package:text -package:dlist package:vector-stream

Map a function over a Stream
Map a monadic function over a Stream
Execute a monadic action for each element of the Stream
Apply monadic function to each element and drop all Nothings