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