∀ {C : Type u_1} {D : Type u_2} [inst : CategoryTheory.Category.{v_1, u_1} C]
  [inst_1 : CategoryTheory.Category.{v_2, u_2} D] (F : CategoryTheory.Functor C D) (A : Type u_4) [inst_2 : AddMonoid A]
  [inst_3 : CategoryTheory.HasShift C A] [inst_4 : CategoryTheory.HasShift D A],
  CategoryTheory.Functor.CommShift.isoZero' F A 0 ⋯ = CategoryTheory.Functor.CommShift.isoZero F A