∀ {C : Type u_1} {D : Type u_2} [inst : CategoryTheory.Category.{u_3, u_1} C]
  [inst_1 : CategoryTheory.Category.{u_4, u_2} D] {P : CategoryTheory.MorphismProperty D}
  {Q : CategoryTheory.MorphismProperty C} [inst_2 : Q.IsMultiplicative] {F : CategoryTheory.Functor C D} {X : D}
  {A B : P.CostructuredArrow Q F X} {f g : A ⟶ B}, f = g ↔ f.left = g.left