{J : CategoryTheory.Limits.MulticospanShape} →
  {C : Type u} →
    [inst : CategoryTheory.Category.{v, u} C] →
      (left : J.L → C) →
        (right : J.R → C) →
          ((b : J.R) → left (J.fst b) ⟶ right b) →
            ((b : J.R) → left (J.snd b) ⟶ right b) → CategoryTheory.Limits.MulticospanIndex J C