∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {J : Type w} [inst_1 : LinearOrder J] {j : J}
  (F : CategoryTheory.Functor (↑(Set.Iic j)) C) (i : J) (hi : i ≤ j),
  CategoryTheory.SmallObject.SuccStruct.arrowMap F i i ⋯ hi =
    CategoryTheory.Arrow.mk (CategoryTheory.CategoryStruct.id (F.obj ⟨i, hi⟩))