code: public PythonWindowedStream time_window(Time size, Time slide) {
  		return new PythonWindowedStream<TimeWindow>(this.stream.timeWindow(size, slide));
  	}
docs: A thin wrapper layer over {@link KeyedStream#timeWindow(Time, Time)}.
  
  @param size The size of the window.
  @return The python wrapper {@link PythonWindowedStream}