∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.MonoidalCategory C]
  [inst_2 : CategoryTheory.BraidedCategory C] (M : CategoryTheory.Bimon C),
  CategoryTheory.CategoryStruct.comp
      (CategoryTheory.MonoidalCategoryStruct.whiskerRight (CategoryTheory.Comon.Hom.mk' CategoryTheory.MonObj.one ⋯ ⋯)
        ((CategoryTheory.Bimon.toComon C).obj M))
      { hom := CategoryTheory.MonObj.mul, isComonHom_hom := ⋯ } =
    (CategoryTheory.MonoidalCategoryStruct.leftUnitor ((CategoryTheory.Bimon.toComon C).obj M)).hom