code: func (s *Server) Close() error {
  	if !s.running.Load().(bool) {
  		return nil
  	}
  	s.running.Store(false)
  	err := s.listener.Close()
  
  	// close all active connections discarding any read/writes that is going on currently
  	s.conns.Range(func(c interface{}) {
  		c.(*Conn).Close()
  	})
  
  	if err != nil {
  		return fmt.Errorf("an error occured before or while stopping the server: %v", err)
  	}
  
  	s.wg.Wait()
  	log.Printf("server: stopped %v", s.addr)
  	return nil
  }
docs: // Close closes the network listener and the active connections.