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