@Override
 public synchronized void addUnique(int index, Object object) {
   super.addUnique(index, object);
 }
 @Override
 protected synchronized void ensureSafety() {
   super.ensureSafety();
 }
 @Override
 public synchronized void move(int newPosition, Object object) {
   super.move(newPosition, object);
 }
 @Override
 public synchronized void clear() {
   super.clear();
 }
 @Override
 public synchronized void setData(int size, Object[] data) {
   super.setData(size, data);
 }