∀ (C : Type u_1) [inst : CategoryTheory.Category.{u_4, u_1} C] (D : Type u_3)
  [inst_1 : CategoryTheory.Category.{u_2, u_3} D] [inst_2 : CategoryTheory.MonoidalCategory D]
  (X : CategoryTheory.Comon (CategoryTheory.Functor C D)),
  CategoryTheory.CategoryStruct.comp
      (CategoryTheory.Monoidal.ComonFunctorCategoryEquivalence.functor.map
        (CategoryTheory.Monoidal.ComonFunctorCategoryEquivalence.unitIso✝.hom.app X))
      (CategoryTheory.Monoidal.ComonFunctorCategoryEquivalence.counitIso.hom.app
        (CategoryTheory.Monoidal.ComonFunctorCategoryEquivalence.functor.obj X)) =
    CategoryTheory.CategoryStruct.id (CategoryTheory.Monoidal.ComonFunctorCategoryEquivalence.functor.obj X)