private JPopupMenu getPopupMenu(ClassNameNode node) {
if (node.getChildAt(0) instanceof UnknownStructureNode) {
return null;
}
KongaPopupMenu pm = new KongaPopupMenu();
pm.addActions(new SelectRequiredAction(node),
tree.getCheckAllAction(node),
tree.getUncheckAllAction(node),
setAuxClassesAction,
setExtendedAttributesAction);
return pm;