∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] [inst_1 : CategoryTheory.Limits.HasFiniteProducts C]
  [inst_2 : CategoryTheory.Limits.HasPullbacks C] {x x_1 x_2 : CategoryTheory.Dial C} (F : x.Hom x_1) (G : x_1.Hom x_2),
  (CategoryTheory.CategoryStruct.comp F G).f = CategoryTheory.CategoryStruct.comp F.f G.f