:: Maybe a -> MaybeT m a -package:universum

Convert a Maybe computation to MaybeT.
Convert a Maybe computation to MaybeT.
Lift a Maybe to the MaybeT monad
Lift a Maybe to the MaybeT monad
Hoist from Maybe context into MaybeT.
This was added in transformers-0.6.0.0. See https://hub.darcs.net/ross/transformers/issue/49.