How to use the @egjs/axes.DIRECTION_DOWN function in @egjs/axes

tutils.simulator($el, { deltaX: -50, deltaY: 100 }, () => {
				// Is down during touch hold?
				expect(check(directionHold[id], Axes.DIRECTION_DOWN)).to.be.ok;

				// Is down during touch unhold?
				expect(check(directionUnhold[id], Axes.DIRECTION_DOWN)).to.be.ok;

				done();
			});
		});

tutils.simulator($el, { deltaX: -50, deltaY: 100 }, () => {
				// Is down during touch hold?
				expect(check(directionHold[id], Axes.DIRECTION_DOWN)).to.be.ok;

				// Is down during touch unhold?
				expect(check(directionUnhold[id], Axes.DIRECTION_DOWN)).to.be.ok;

				done();
			});
		});

* @type {Number}
	 * @default 8
	 */
	static DIRECTION_UP = Axes.DIRECTION_UP;

	/**
	 * Constant value for down direction.
	 * @ko down 방향에 대한 상수 값.
	 * @name DIRECTION_DOWN
	 * @memberof eg.Flicking
	 * @static
	 * @constant
	 * @type {Number}
	 * @default 16
	 */
	static DIRECTION_DOWN = Axes.DIRECTION_DOWN;

	/**
	 * Constant value for horizontal direction.
	 * @ko horizontal 방향에 대한 상수 값.
	 * @name DIRECTION_HORIZONTAL
	 * @memberof eg.Flicking
	 * @static
	 * @constant
	 * @type {Number}
	 * @default 6
	 */
	static DIRECTION_HORIZONTAL = Axes.DIRECTION_HORIZONTAL;

	/**
	 * Constant value for vertical direction.
	 * @ko vertical 방향에 대한 상수 값.

return Flicking;
  }(Mixin(Component)["with"](eventHandler));

  Flicking.utils = utils;
  Flicking.VERSION = "2.5.1";
  Flicking.consts = {
    EVENTS: EVENTS,
    TRANSFORM: TRANSFORM,
    SUPPORT_WILLCHANGE: SUPPORT_WILLCHANGE,
    IS_ANDROID2: IS_ANDROID2
  };
  Flicking.DIRECTION_NONE = Axes.DIRECTION_NONE;
  Flicking.DIRECTION_LEFT = Axes.DIRECTION_LEFT;
  Flicking.DIRECTION_RIGHT = Axes.DIRECTION_RIGHT;
  Flicking.DIRECTION_UP = Axes.DIRECTION_UP;
  Flicking.DIRECTION_DOWN = Axes.DIRECTION_DOWN;
  Flicking.DIRECTION_HORIZONTAL = Axes.DIRECTION_HORIZONTAL;
  Flicking.DIRECTION_VERTICAL = Axes.DIRECTION_VERTICAL;
  Flicking.DIRECTION_ALL = Axes.DIRECTION_ALL;
  return Flicking;
}();