{C : Type u_1} →
  {D : Type u_2} →
    [inst : CategoryTheory.Category.{v_1, u_1} C] →
      [inst_1 : CategoryTheory.Category.{v_2, u_2} D] →
        {F F' : CategoryTheory.Functor C D} → {G : CategoryTheory.Functor D C} → (F ⊣ G) → (F' ⊣ G) → (F ≅ F')