{C : Type u} →
  [inst : CategoryTheory.Category.{v, u} C] →
    {X Y : C} →
      {f g : X ⟶ Y} →
        {s : CategoryTheory.Limits.Fork f g} →
          CategoryTheory.Limits.IsLimit s →
            {W : C} →
              (k : W ⟶ X) →
                CategoryTheory.CategoryStruct.comp k f = CategoryTheory.CategoryStruct.comp k g →
                  { l // CategoryTheory.CategoryStruct.comp l s.ι = k }