∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] {D : Type u₂} [inst_1 : CategoryTheory.Category.{v₂, u₂} D]
  {F G H : CategoryTheory.Functor D C} [inst_2 : CategoryTheory.Limits.HasPushouts C] (f : F ⟶ G) (g : F ⟶ H) (d : D),
  CategoryTheory.CategoryStruct.comp ((CategoryTheory.Limits.pushout.inr f g).app d)
      (CategoryTheory.Limits.pushoutObjIso f g d).hom =
    CategoryTheory.Limits.pushout.inr (f.app d) (g.app d)