∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {J : CategoryTheory.Limits.MulticospanShape}
  (I : CategoryTheory.Limits.MulticospanIndex J C) [inst_1 : CategoryTheory.Limits.HasMultiequalizer I] (a : J.L),
  (CategoryTheory.Limits.Multiequalizer.multifork I).ι a = CategoryTheory.Limits.Multiequalizer.ι I a