}
  protected void processThumbnailUpdate(BufferedImage image, int minX, int minY,					int width, int height, int periodX,					int periodY, int[] bands)  {    Iterator it = updateListeners.iterator();    while (it.hasNext())      {	IIOReadUpdateListener listener = (IIOReadUpdateListener) it.next();	listener.thumbnailUpdate(this, image, minX, minY, width, height,				 periodX, periodY, bands);      }  }