∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {D : Type w} [inst_1 : CategoryTheory.Category.{w', w} D]
  [inst_2 : CategoryTheory.Abelian D] {J : CategoryTheory.GrothendieckTopology C}
  [inst_3 : CategoryTheory.HasSheafify J D], (CategoryTheory.presheafToSheaf J D).Additive