code: func (cbw *KvBytesPluginWrapper) NewBroker(prefix string) keyval.BytesBroker {
  	return NewBytesBrokerWrapper(cbw.KvBytesPlugin.NewBroker(prefix), cbw.decrypter, cbw.decryptFunc)
  }
docs: // NewBroker returns a BytesBroker instance with support for decrypting values that prepends given <keyPrefix> to all
  // keys in its calls.
  // To avoid using a prefix, pass keyval.Root constant as argument.