code: func (pdb *BytesBrokerWatcherEtcd) ListValues(key string) (keyval.BytesKeyValIterator, error) {
  	return listValuesInternal(pdb.Logger, pdb.kv, pdb.opTimeout, key)
  }
docs: // ListValues calls 'ListValues' function of the underlying BytesConnectionEtcd.
  // KeyPrefix defined in constructor is prepended to the key argument.
  // The prefix is removed from the keys of the returned values.