code: func (pdb *BytesBrokerWatcherRedis) ListKeys(match string) (keyval.BytesKeyIterator, error) {
  	if pdb.delegate.closed {
  		return nil, fmt.Errorf("ListKeys(%s) called on a closed connection", match)
  	}
  	return listKeys(pdb.delegate, match, pdb.addPrefix, pdb.trimPrefix)
  }
docs: // ListKeys calls ListKeys function of BytesConnectionRedis.
  // Prefix will be prepended to key argument when searching.
  // The returned keys, however, will have the prefix trimmed.
  // When done traversing, you must close the iterator by calling its Close() method.