∀ {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)),
  { app := fun X_1 => { hom := (CategoryTheory.CategoryStruct.id X).hom.app X_1, isComonHom_hom := ⋯ },
      naturality := ⋯ } =
    CategoryTheory.CategoryStruct.id (CategoryTheory.Monoidal.ComonFunctorCategoryEquivalence.functorObj X.X)