∀ {J : Type u_4} {C : Type u_2} [inst : CategoryTheory.Category.{u_3, u_4} J]
  [inst_1 : CategoryTheory.Category.{u_1, u_2} C] {F : CategoryTheory.Functor J C} {i₀ : J}
  (h : F.IsEventuallyConstantFrom i₀) [inst_2 : CategoryTheory.IsFiltered J] (c : CategoryTheory.Limits.Cocone F)
  [inst_3 : CategoryTheory.IsIso (c.ι.app i₀)] (j : J),
  CategoryTheory.CategoryStruct.comp (h.cocone.ι.app j) (CategoryTheory.asIso (c.ι.app i₀)).hom = c.ι.app j