∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {W W' : CategoryTheory.MorphismProperty C},
  (∀ {X Y Z : C} (f : X ⟶ Y) (g : Y ⟶ Z), W' g → W (CategoryTheory.CategoryStruct.comp f g) → W f) →
    W.HasOfPostcompProperty W'