docs: public RunList<R> byTimestamp(final long start, final long end) {
          return
          limit(new CountingPredicate<R>() {
              public boolean apply(int index, R r) {
                  return start<=r.getTimeInMillis();
              }
          }).filter(new Predicate<R>() {
          	public boolean apply(R r) {
          		return r.getTimeInMillis()<end;
                      }
          });
      }