code: func NewServer(addr string) *Server {
  	s := &Server{
  		addr:           addr,
  		conns:          cmap.New(),
  		disconnHandler: func(c *Conn) {},
  	}
  	s.running.Store(false)
  	return s
  }
docs: // NewServer creates a new Neptulon server.
  // addr should be formatted as host:port (i.e. 127.0.0.1:3000)