∀ (V : Type u_2) [inst : CategoryTheory.Category.{u_1, u_2} V] (G : Type u_3) [inst_1 : Monoid G]
  [inst_2 : CategoryTheory.MonoidalCategory V] {X Y : Action V G} (f : X ⟶ Y) (X' : Action V G),
  CategoryTheory.CategoryStruct.comp
      (CategoryTheory.MonoidalCategoryStruct.whiskerRight ((Action.forget V G).map f) ((Action.forget V G).obj X'))
      (CategoryTheory.Iso.refl
          (CategoryTheory.MonoidalCategoryStruct.tensorObj ((Action.forget V G).obj Y)
            ((Action.forget V G).obj X'))).hom =
    CategoryTheory.CategoryStruct.comp
      (CategoryTheory.Iso.refl
          (CategoryTheory.MonoidalCategoryStruct.tensorObj ((Action.forget V G).obj X)
            ((Action.forget V G).obj X'))).hom
      ((Action.forget V G).map (CategoryTheory.MonoidalCategoryStruct.whiskerRight f X'))