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Set Universe Polymorphism.
Module Type T.
Axiom foo@{u v|u < v} : Type@{v}.
End T.
Module M : T with Definition foo@{u v} := Type@{u} : Type@{v}.
Definition foo@{u v} := Type@{u} : Type@{v}.
End M.
Fail Module M' : T with Definition foo := Type.
(* Without the binder expression we have to do trickery to get the
universes in the right order. *)
Module M' : T with Definition foo := let t := Type in t.
Definition foo := let t := Type in t.
End M'.
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