public <T> void onChanged(SetChangeListener.Change<? super T> change) {
if (change.wasAdded()) {
out.printf("Added: %s", change.getElementAdded());
} else if (change.wasRemoved()) {
out.printf("Removed: %s", change.getElementRemoved());
}
out.printf(", Set after the change: %s\n", change.getSet());
}
@Override
public void onChanged(final SetChangeListener.Change<? extends File> c) {
assertFxApplicationThread();
if (c.getElementRemoved() != null)
unselectTreeItemForUnselectedFile(c.getElementRemoved());
if (c.getElementAdded() != null) selectFileTreeItemForSelectedFile(c.getElementAdded());
updateDisable();
}