public void closeButton_actionPerformed(ActionEvent e) {
   if (!checkValidFrom() || !checkValidUntil()) {
     return;
   }
   this.validFromResult =
       (validFrom.isSet() && validFrom.isValidInput() ? validFrom.getTimeStamp() : 0);
   this.invalidFromResult =
       (validUntil.isSet() && validUntil.isValidInput()
           ? validUntil.getTimeStamp() + 1000
           : Long.MAX_VALUE);
   super.closeButton_actionPerformed(e);
 }