@Override
 public void clear() {
   storage.clear();
 }
 @Override
 public int size() {
   return storage.size();
 }
 @Override
 public Lock getLock() {
   return storage.getLock();
 }
 @Override
 public void unlock(E key) {
   storage.unlock(key);
 }
 @Override
 public void lock(E key) {
   storage.lock(key);
 }
 @Override
 public void save(E key, Object value) {
   storage.save(key, value);
 }
 @Override
 public Object load(E key) {
   return storage.load(key);
 }