∀ {J : Type w} {C : Type u} [inst : CategoryTheory.Category.{v, u} C]
  [inst_1 : CategoryTheory.Limits.HasZeroMorphisms C] (f : J → C) [inst_2 : CategoryTheory.Limits.HasBiproduct f]
  {b : CategoryTheory.Limits.Bicone f} (hb : b.IsBilimit),
  (hb.isLimit.conePointUniqueUpToIso (CategoryTheory.Limits.biproduct.isLimit f)).inv =
    CategoryTheory.Limits.biproduct.desc b.ι