code: function TweenGroup(paused, timeScale) {
  		this._tweens = [];
  		this.paused = paused;
  		this.timeScale = timeScale;
  		this.__onComplete = this._onComplete.bind(this);
  	}
docs: TweenGroup allows you to pause and time scale a collection of tweens or timelines. For example, this could be
  used to stop all tweens associated with a view when leaving that view.
  
  myView.tweens = new createjs.TweenGroup();
  myView.tweens.get(spinner, {loop: -1}).to({rotation:360}, 500);
  myView.tweens.get(image).to({alpha: 1}, 5000);
  // ... make all tweens in this view run in slow motion:
  myView.tweens.timeScale = 0.1;
  // ... pause all this view's active tweens:
  myView.tweens.paused = true; // stop all tweens.
  
  You can add a group to another group to nest it.
  
  viewTweenGroup.add(buttonTweenGroup);
  
  Tweens are automatically removed from the group when they complete (ie. when the `complete` event fires).
  
  @class TweenGroup
  @param {Boolean} [paused] The initial paused property value for this group.
  @param {Number} [timeScale] The intiial timeScale property value for this group.
  @constructor