code: func (cbb *BytesBrokerWrapper) ListValues(key string) (keyval.BytesKeyValIterator, error) {
  	kv, err := cbb.BytesBroker.ListValues(key)
  	if err != nil {
  		return kv, err
  	}
  	return &BytesKeyValIteratorWrapper{
  		BytesKeyValIterator: kv,
  		decryptData:         cbb.decryptData,
  	}, nil
  }
docs: // ListValues returns an iterator that enables to traverse all items stored
  // under the provided <key>.