∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] (J : CategoryTheory.GrothendieckTopology C) {D : Type u_1}
  [inst_1 : CategoryTheory.Category.{v_1, u_1} D] [inst_2 : CategoryTheory.HasWeakSheafify J D]
  {P : CategoryTheory.Functor Cᵒᵖ D} (hP : CategoryTheory.Presheaf.IsSheaf J P),
  (CategoryTheory.isoSheafify J hP).hom = CategoryTheory.toSheafify J P