{C : Type u} →
  [inst : CategoryTheory.Category.{v, u} C] →
    {D : Type u_1} →
      [inst_1 : CategoryTheory.Category.{v_1, u_1} D] →
        CategoryTheory.Functor (CategoryTheory.WithInitial C) D ≌
          CategoryTheory.Comma (CategoryTheory.Functor.const C) (CategoryTheory.Functor.id (CategoryTheory.Functor C D))