code: public Rowtime watermarksPeriodicBounded(long delay) {
  		internalProperties.putString(ROWTIME_WATERMARKS_TYPE, ROWTIME_WATERMARKS_TYPE_VALUE_PERIODIC_BOUNDED);
  		internalProperties.putLong(ROWTIME_WATERMARKS_DELAY, delay);
  		return this;
  	}
docs: Sets a built-in watermark strategy for rowtime attributes which are out-of-order by a bounded
  time interval.
  
  <p>Emits watermarks which are the maximum observed timestamp minus the specified delay.
  
  @param delay delay in milliseconds