else if (!parentNode.hasChildren ())
} else if (!parentNode.hasChildren ()) {
  public void expandNode(final Object parent, Container panel) {	if (debug)	  System.out.println ("TaskModel.expandNode - expanding node " + parent);		final Node parentNode = (Node) parent;	if (!(parentNode instanceof DBUIDNode) && !(parentNode instanceof ByCarrier))	  return;	if (parentNode instanceof ByCarrier && !parentNode.hasChildren ())	  worker = new CarrierQueryWorker (parentNode, myTree, panel);	else if (!parentNode.hasChildren ())	  worker = new UnitQueryWorker (parentNode, myTree, panel);	if (worker != null)	  worker.startWorker();  }