assert e.getSource() == repository;
boolean isValid = repository.isValid();
dialogDescriptor.setValid(isValid);
set.setEnabled(isValid);
if (isValid) {
notificationLineSupport.clearMessages();
} else {
String errMsg = repository.getMessage();
if ((errMsg != null) && (errMsg.length() != 0)) {
notificationLineSupport.setErrorMessage(errMsg);
} else {