∀ {C₁ : Type u₁} {C₂ : Type u₂} [inst : CategoryTheory.Category.{v₁, u₁} C₁]
  [inst_1 : CategoryTheory.Category.{v₂, u₂} C₂] {W₁ : CategoryTheory.MorphismProperty C₁}
  {W₂ : CategoryTheory.MorphismProperty C₂} (Φ : CategoryTheory.LocalizerMorphism W₁ W₂) {D₁ : Type u_1} {D₂ : Type u_2}
  [inst_2 : CategoryTheory.Category.{v_1, u_1} D₁] [inst_3 : CategoryTheory.Category.{v_2, u_2} D₂]
  (L₁ : CategoryTheory.Functor C₁ D₁) (L₂ : CategoryTheory.Functor C₂ D₂) [inst_4 : L₁.IsLocalization W₁]
  [inst_5 : L₂.IsLocalization W₂] [Φ.IsLeftDerivabilityStructure],
  CategoryTheory.TwoSquare.GuitartExact (CategoryTheory.CatCommSq.iso Φ.functor L₁ L₂ (Φ.localizedFunctor L₁ L₂)).inv