void showItem (int index) { ExpandItem item = items [index];
void showItem (ExpandItem item) {
void showItem (int index) {	ExpandItem item = items [index];	Control control = item.control;	if (control != null && !control.isDisposed ()) {		control.setVisible (item.expanded);	}	item.redraw ();	layoutItems (index + 1, true);}