een share in the room with default publisherID
  or it can also accept an <code class="property">publisherID</code> which restricts the screen share publisher that 
  can publish to this subscriber.
  
  ScreenShareSubscriber is a basic screen share subscriber component, it does the minmum needed to subscribe to the screen share. 
  Use ScreenShareSubscriberComplex to enhance the feature with zoom and annotations.
    Example:
  _ssSubscriber = new ScreenShareSubscriber(); 
  _ssSubscriber.publisherID = myS