{C : Type u} →
  [inst : CategoryTheory.Category.{v, u} C] →
    {W : CategoryTheory.MorphismProperty C} →
      {motive : W.IsStableUnderFiniteCoproducts → Sort u_1} →
        (t : W.IsStableUnderFiniteCoproducts) →
          ((isStableUnderCoproductsOfShape : ∀ (J : Type) [Finite J], W.IsStableUnderCoproductsOfShape J) → motive ⋯) →
            motive t