docs: public static ScheduleExpression copyBase(ScheduleExpression schedule) // d632906
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
              Tr.debug(tc, "copy copyBase: " + Util.identity(schedule));
  
          // 'schedule' could be a subclass of ScheduleExpression.
          // Use only the base class constructor.
  
          return new ScheduleExpression()
                          .start(schedule.getStart() == null ? null : new Date(schedule.getStart().getTime()))
                          .end(schedule.getEnd() == null ? null : new Date(schedule.getEnd().getTime()))
                          .timezone(schedule.getTimezone())
                          .second(schedule.getSecond())
                          .minute(schedule.getMinute())
                          .hour(schedule.getHour())
                          .dayOfMonth(schedule.getDayOfMonth())
                          .dayOfWeek(schedule.getDayOfWeek())
                          .month(schedule.getMonth())
                          .year(schedule.getYear());
  
      }