∀ {α β : Type u_2} {α' β' : Type u_3} (F : Type u_2 → Type u_3 → Type u_1) [inst : Bifunctor F] [LawfulBifunctor F]
  (h : α ≃ β) (h' : α' ≃ β') (x : F β β'), bimap (⇑h) (⇑h') (bimap (⇑h.symm) (⇑h'.symm) x) = x