∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {F : CategoryTheory.Functor Cᵒᵖ (Type w)}
  (G : CategoryTheory.Subfunctor F) {ι : Type w'} {X : ι → Cᵒᵖ} (x : (i : ι) → F.obj (X i)),
  G.IsGeneratedBy x = (⨆ i, CategoryTheory.Subfunctor.ofSection (x i) = G)