{C : Type u₁} →
  [inst : CategoryTheory.Category.{v₁, u₁} C] →
    [inst_1 : CategoryTheory.MonoidalCategory C] →
      {X Y : CategoryTheory.Center C} →
        {motive : X.Hom Y → Sort u} →
          ((f : X.fst ⟶ Y.fst) →
              (comm :
                  ∀ (U : C),
                    CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategoryStruct.whiskerRight f U)
                        (Y.snd.β U).hom =
                      CategoryTheory.CategoryStruct.comp (X.snd.β U).hom
                        (CategoryTheory.MonoidalCategoryStruct.whiskerLeft U f)) →
                motive { f := f, comm := comm }) →
            (t : X.Hom Y) → motive t