(C : Type u) →
  {A : Type u_1} →
    [inst : CategoryTheory.Category.{v, u} C] →
      [inst_1 : AddCommMonoid A] →
        [inst_2 : CategoryTheory.HasShift C A] →
          (i j : A) →
            (CategoryTheory.shiftFunctor C i).comp (CategoryTheory.shiftFunctor C j) ≅
              (CategoryTheory.shiftFunctor C j).comp (CategoryTheory.shiftFunctor C i)