∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {D : Type u'} [inst_1 : CategoryTheory.Category.{v', u'} D]
  {W : CategoryTheory.MorphismProperty C} {F₁ F₂ : W.FunctorsInverting D} {α β : F₁ ⟶ F₂}, α.hom.app = β.hom.app → α = β