∀ {C : Type u'} [inst : CategoryTheory.Category.{v', u'} C] {J : CategoryTheory.GrothendieckTopology C}
  {R₀ : CategoryTheory.Functor Cᵒᵖ RingCat} {R : CategoryTheory.Sheaf J RingCat} (α : R₀ ⟶ R.obj)
  [inst_1 : CategoryTheory.Presheaf.IsLocallyInjective J α] [inst_2 : CategoryTheory.Presheaf.IsLocallySurjective J α]
  [inst_3 : J.WEqualsLocallyBijective AddCommGrpCat] [inst_4 : CategoryTheory.HasWeakSheafify J AddCommGrpCat]
  (M : SheafOfModules R),
  (SheafOfModules.toSheaf R).map ((PresheafOfModules.sheafificationAdjunction α).counit.app M) =
    (CategoryTheory.sheafificationAdjunction J AddCommGrpCat).counit.app ((SheafOfModules.toSheaf R).obj M)