{B : Type u₁} →
  [inst : Quiver B] →
    [inst_1 : (a b : B) → Quiver (a ⟶ b)] →
      {C : Type u₂} →
        [inst_2 : Quiver C] →
          [inst_3 : (a b : C) → Quiver (a ⟶ b)] →
            (self : CategoryTheory.PrelaxFunctorStruct B C) →
              {a b : B} → {f g : a ⟶ b} → (f ⟶ g) → (self.map f ⟶ self.map g)