code: public AllWindowedStream<T, GlobalWindow> countWindowAll(long size, long slide) {
  		return windowAll(GlobalWindows.create())
  				.evictor(CountEvictor.of(size))
  				.trigger(CountTrigger.of(slide));
  	}
docs: Windows this {@code DataStream} into sliding count windows.
  
  <p>Note: This operation is inherently non-parallel since all elements have to pass through
  the same operator instance.
  
  @param size The size of the windows in number of elements.
  @param slide The slide interval in number of elements.