docs: public RunList<R> newBuilds() {
          GregorianCalendar cal = new GregorianCalendar();
          cal.add(Calendar.DAY_OF_YEAR, -7);
          final long t = cal.getTimeInMillis();
  
          // can't publish on-going builds
          return filter(new Predicate<R>() {
              public boolean apply(R r) {
                  return !r.isBuilding();
              }
          })
          // put at least 10 builds, but otherwise ignore old builds
          .limit(new CountingPredicate<R>() {
              public boolean apply(int index, R r) {
                  return index < 10 || r.getTimeInMillis() >= t;
              }
          });
      }