∀ {J : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} J] {C : Type u₃} [inst_1 : CategoryTheory.Category.{v₃, u₃} C]
  (F : CategoryTheory.Functor J C),
  (CategoryTheory.Limits.Cone.equivCostructuredArrow F).functor = CategoryTheory.Limits.Cone.toCostructuredArrow F