∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {X Y Z : C} (f : X ⟶ Y) (g : X ⟶ Z)
  [inst_1 : CategoryTheory.Limits.HasPushout f g],
  CategoryTheory.CategoryStruct.comp (CategoryTheory.Limits.pushout.inr f g)
      (CategoryTheory.Limits.pushoutSymmetry f g).hom =
    CategoryTheory.Limits.pushout.inl g f