code: func (db *BytesConnectionRedis) NewWatcher(prefix string) keyval.BytesWatcher {
  	return db.NewBrokerWatcher(prefix)
  }
docs: // NewWatcher creates a new KeyValProtoWatcher proxy instance to redis using BytesConnectionRedis.
  // The given prefix will be prepended to key argument in all calls.
  // Specify empty string ("") if not wanting to use prefix.