code: public WindowedStream<T, KEY, GlobalWindow> countWindow(long size, long slide) {
  		return window(GlobalWindows.create())
  				.evictor(CountEvictor.of(size))
  				.trigger(CountTrigger.of(slide));
  	}
docs: Windows this {@code KeyedStream} into sliding count windows.
  
  @param size The size of the windows in number of elements.
  @param slide The slide interval in number of elements.