How to access stage instances outside of document class?

Basically like this:

In the document class:

VideoPlayer.netStreamClientClass = TsVideoClient;

player.play();

And in the TsVideoClient.as file :

package {
    import fl.video.VideoPlayer;
    import fl.video.VideoPlayerClient;
    import flash.display.DisplayObjectContainer;
    dynamic public class TsVideoClient extends VideoPlayerClient
    {
        public function   TsVideoClient(vp:VideoPlayer)
        {
            super(vp);
        }
        public function someTsFunc(d)
        {
            timeinfo.text = d;//Access of undefined property timeinfo,which is an instance of stage,I can access it in the document class though...

        }
        override public function get ready():Boolean
        {
            return super.ready;
        }
    }
}