∀ {C : Type u_1} {D : Type u_2} [inst : CategoryTheory.Category.{v_1, u_1} C]
  [inst_1 : CategoryTheory.Category.{v_2, u_2} D] [inst_2 : CategoryTheory.MonoidalCategory C]
  [inst_3 : CategoryTheory.MonoidalCategory.MonoidalRightAction C D] {d d' : D} (f : d ⟶ d') (c : C),
  CategoryTheory.MonoidalCategory.MonoidalRightActionStruct.actionHomLeft f c =
    CategoryTheory.MonoidalCategory.MonoidalRightActionStruct.actionHom f (CategoryTheory.CategoryStruct.id c)