fact: Definition lowerCoyoneda `{Functor f} {a : Type} (c : Coyoneda f a) : f a := match c with COYO _ g h => fmap g h end.
imports: Hask.Prelude Hask.Ltac Hask.Data.Functor.Identity Hask.Data.Functor.Kan Hask.Control.Monad FunctionalExtensionality