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datatype t = datatype Basis.option
val monad : monad t
val eq : a ::: Type -> eq a -> eq (t a)
val ord : a ::: Type -> ord a -> ord (t a)
val isNone : a ::: Type -> t a -> bool
val isSome : a ::: Type -> t a -> bool
val mp : a ::: Type -> b ::: Type -> (a -> b) -> t a -> t b
val app : m ::: (Type -> Type) -> a ::: Type -> monad m -> (a -> m {}) -> t a -> m {}
val bind : a ::: Type -> b ::: Type -> (a -> option b) -> t a -> t b
val get : a ::: Type -> a -> option a -> a
val unsafeGet : a ::: Type -> option a -> a
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