{C : Type u₁} →
  [inst : CategoryTheory.Category.{v₁, u₁} C] →
    {D : Type u₂} →
      [inst_1 : CategoryTheory.Category.{v₂, u₂} D] →
        {E : Type u₃} →
          [inst_2 : CategoryTheory.Category.{v₃, u₃} E] →
            (F : CategoryTheory.Functor C (CategoryTheory.Functor D E)) →
              {x₁ x₂ : CategoryTheory.ThinSkeleton C} →
                (x₁ ⟶ x₂) →
                  (CategoryTheory.ThinSkeleton.map₂Functor F x₁ ⟶ CategoryTheory.ThinSkeleton.map₂Functor F x₂)