∀ {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] {A : Type u_5} [inst_2 : AddMonoid A]
  [inst_3 : CategoryTheory.HasShift D A] {F G : CategoryTheory.SingleFunctors C D A} (e : F ≅ G) (n : A)
  {Z : CategoryTheory.Functor C D} (h : G.functor n ⟶ Z),
  CategoryTheory.CategoryStruct.comp (e.inv.hom n) (CategoryTheory.CategoryStruct.comp (e.hom.hom n) h) = h