private Set<Object> addPaths(Collection elements) {
Set<Object> target = new HashSet<Object>();
if (elements != null) {
for (Object each : elements) {
final Object node = ((TreePath) each).getLastPathComponent();
if (node instanceof DefaultMutableTreeNode) {
final Object descriptor = ((DefaultMutableTreeNode) node).getUserObject();
if (descriptor instanceof NodeDescriptor) {
final Object element = myUi.getElementFromDescriptor((NodeDescriptor) descriptor);
if (element != null) {
target.add(element);
}
}
}
}
}
return target;
}
