private static Children createFolderChildren(Folder folder) {
for (FolderElement elem : folder.getElements()) {
if (elem instanceof Folder) {
return new FolderChildren(folder);
}
}
return Children.LEAF;
}
@Override
public void addNotify() {
List<Folder> result = new ArrayList<>();
for (FolderElement o : folder.getElements()) {
if (o instanceof Folder) {
result.add((Folder) o);
}
}
this.setKeys(result);
}