code: public Double getMean() {
  		return processFunction(new AbstractSplitFunction<Double>(0.0D) {
  			@Override
  			public void evaluate(long runningFor) {
  				result += (double) runningFor;
  			}
  
  			@Override
  			public Double result() {
  				return result / (double) splits.size();
  			}
  
  		});
  	}
docs: Compute mean duration of splits in the buffer
  
  @return Mean or average