∀ {C : Type u_1} [inst : CategoryTheory.Category.{u_3, u_1} C] (F : CategoryTheory.Functor C (Type u_2))
  (A : CategoryTheory.Subfunctor F),
  (fun X => CategoryTheory.Subfunctor.range X.arrow) ((fun A => CategoryTheory.Subobject.mk A.ι) A) = A