∀ {C : Type uC} [inst : CategoryTheory.Category.{uC', uC} C] [inst_1 : CategoryTheory.Limits.HasZeroMorphisms C]
  [inst_2 : CategoryTheory.Limits.HasBinaryBiproducts C] {W X Y Z : C} (f : W ⟶ Y) (g : X ⟶ Z),
  CategoryTheory.CategoryStruct.comp (CategoryTheory.Limits.biprod.braiding X W).hom
      (CategoryTheory.CategoryStruct.comp (CategoryTheory.Limits.biprod.map f g)
        (CategoryTheory.Limits.biprod.braiding Y Z).hom) =
    CategoryTheory.Limits.biprod.map g f