docs: static long comparable(DateValue dv) {
          long comp = (((((long) dv.year()) << 4) + dv.month()) << 5) + dv.day();
          if (dv instanceof TimeValue) {
              TimeValue tv = (TimeValue) dv;
              // We add 1 to comparable for timed values to make sure that timed
              // events are distinct from all-day events, in keeping with
              // DateValue.compareTo.
  
              // It would be odd if an all day exclusion matched a midnight event on
              // the same day, but not one at another time of day.
              return (((((comp << 5) + tv.hour()) << 6) + tv.minute()) << 6)
                      + tv.second() + 1;
          } else {
              return comp << 17;
          }
      }