∀ {J : Type u_2} [inst : CategoryTheory.Category.{u_4, u_2} J] {C : Type u_3}
  [inst_1 : CategoryTheory.Category.{u_1, u_3} C] (F : CategoryTheory.Functor J C)
  {X Y Z : CategoryTheory.StructuredArrow F (CategoryTheory.Functor.const J)} (f : X ⟶ Y) (g : Y ⟶ Z),
  { hom := (CategoryTheory.CategoryStruct.comp f g).right, w := ⋯ } =
    CategoryTheory.CategoryStruct.comp { hom := f.right, w := ⋯ } { hom := g.right, w := ⋯ }