{C₁ : Type u₁} →
  {C₂ : Type u₂} →
    {C₃ : Type u₃} →
      {C₄ : Type u₄} →
        [inst : CategoryTheory.Category.{v₁, u₁} C₁] →
          [inst_1 : CategoryTheory.Category.{v₂, u₂} C₂] →
            [inst_2 : CategoryTheory.Category.{v₃, u₃} C₃] →
              [inst_3 : CategoryTheory.Category.{v₄, u₄} C₄] →
                (T : CategoryTheory.Functor C₁ C₂) →
                  (L : CategoryTheory.Functor C₁ C₃) →
                    (R : CategoryTheory.Functor C₂ C₄) →
                      (B : CategoryTheory.Functor C₃ C₄) → (T.comp R ⟶ L.comp B) → CategoryTheory.TwoSquare T L R B