∀ {C : Type uC} {inst : CategoryTheory.Category.{uC', uC} C} {inst_1 : CategoryTheory.Limits.HasZeroMorphisms C}
  {P Q : C} [self : CategoryTheory.Limits.HasBinaryBiproduct P Q],
  Nonempty (CategoryTheory.Limits.BinaryBiproductData P Q)