docs: public static Date getTime(Datebox datebox, Timebox timebox) {
          if (timebox.getValue() == null || datebox.getValue() == null) {
              return DateUtil.stripTime(datebox.getValue());
          }
  
          Calendar date = Calendar.getInstance();
          Calendar time = Calendar.getInstance();
          date.setTime(datebox.getValue());
          time.setTime(timebox.getValue());
          time.set(date.get(Calendar.YEAR), date.get(Calendar.MONTH), date.get(Calendar.DAY_OF_MONTH));
          return time.getTime();
      }