public SizeCounter(String name, boolean start, boolean mergephases) { units = new EventCounter(name, start, mergephases); volume = new EventCounter(name+"Volume", start, mergephases);
public SizeCounter(String name) { this(name, true, false);
  public SizeCounter(String name, boolean start, boolean mergephases) {    units = new EventCounter(name, start, mergephases);    volume = new EventCounter(name+"Volume", start, mergephases);  }