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(record Maybe/Just value)
(record Maybe/Nothing)
(let Maybe/just Maybe/Just/create)
(let Maybe/nothing Maybe/Nothing/create)
(let Maybe/map (\[f m]
(match (kind m)
:Maybe/Just (Maybe/just (f (Maybe/Just/get-value m)))
:Maybe/Nothing (Maybe/nothing))))
(let Maybe/and-then (\[f m]
(match (kind m)
:Maybe/Just (f (Maybe/Just/get-value m))
:Maybe/Nothing (Maybe/nothing))))
(let Maybe/default (\[default m]
(match (kind m)
:Maybe/Just (Maybe/Just/get-value m)
:Result/Ex default)))
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