∀ {I : Type u_1} {J : Type u_2} {C : Type u_4} [inst : CategoryTheory.Category.{v_1, u_4} C]
  {X : CategoryTheory.GradedObject I C} {p : I → J} {j : J} [inst_1 : X.HasMap p] {c : X.CofanMapObjFun p j}
  (hc : CategoryTheory.Limits.IsColimit c) (i : I) (hi : p i = j),
  CategoryTheory.CategoryStruct.comp (CategoryTheory.Limits.Cofan.inj c ⟨i, hi⟩)
      (CategoryTheory.GradedObject.CofanMapObjFun.iso hc).hom =
    X.ιMapObj p i j hi