code: func (g *memberSet) NodeMeta(limit int) []byte {
  	buf, err := g.papi.Serializer.Marshal(g.papi.Node())
  	if err != nil {
  		g.Logger.Printf("marshal message error: %s", err)
  		return []byte{}
  	}
  	return buf
  }
docs: // NodeMeta implementation of the memberlist.Delegate interface.