{C : Type u} →
  [inst : CategoryTheory.Category.{v, u} C] →
    (J : CategoryTheory.GrothendieckTopology C) →
      (F : CategoryTheory.Functor Cᵒᵖ (Type (max u v))) →
        J.sheafify F ≅
          (CategoryTheory.Subfunctor.sheafify J (CategoryTheory.Subfunctor.range (J.toSheafify F))).toFunctor