code: protected void onStopwatchSplit(Stopwatch stopwatch, Split split) {
  		Buckets buckets = getOrCreateBuckets(stopwatch);
  		if (buckets != null) {
  			buckets.addValue(split.runningFor());
  			buckets.log(split);
  		}
  	}
docs: Called when there is a new split on a Stopwatch, either
  {@link #onStopwatchStop} or {@link #onStopwatchAdd}.
  If buckets have been initialized, the value is added to appropriate bucket.