{- $setup

>>> :m
>>> import Streamly.Data.Unfold (Unfold)
>>> import qualified Streamly.Data.Fold as Fold
>>> import qualified Streamly.Data.Stream as Stream
>>> import qualified Streamly.Data.Unfold as Unfold

For APIs that have not been released yet.

>>> import qualified Streamly.Internal.Data.Unfold as Unfold
-}