FileDescriber.Element.LAST_MODIFIED));
@Override
public void selectionChanged(SelectionChangedEvent evt) {
OrderedSelection selection = (OrderedSelection) evt.getSelection();
Object[] files = selection.toArray();
if (files.length == 0) {
onNothingSelected();
} else if (files.length == 1) {
onOneFileSelected((File) files[0]);
}