∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {A F G : CategoryTheory.Functor Cᵒᵖ (Type v)} {η : F ⟶ A}
  {μ : G ⟶ A} {ε : F ⟶ G},
  CategoryTheory.CategoryStruct.comp ε μ = η →
    ∀ {X : C} {s : CategoryTheory.yoneda.obj X ⟶ A} {u : F.obj (Opposite.op X)},
      CategoryTheory.OverPresheafAux.MakesOverArrow η s u →
        CategoryTheory.OverPresheafAux.MakesOverArrow μ s (ε.app (Opposite.op X) u)