∀ {A : Type u_1} [inst : CategoryTheory.Category.{v_1, u_1} A] {B : Type u_2}
  [inst_1 : CategoryTheory.Category.{v_2, u_2} B] {T : Type u_3} [inst_2 : CategoryTheory.Category.{v_3, u_3} T]
  (L : CategoryTheory.Functor A T) (R : CategoryTheory.Functor B T) {W : CategoryTheory.MorphismProperty T}
  [W.RespectsIso], (CategoryTheory.MorphismProperty.commaObj L R W).IsClosedUnderIsomorphisms