{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] → CategoryTheory.Functor Cᵒᵖ D → ⦃X B : C⦄ → (X ⟶ B) → Prop