code: func (s *Server) LANSegments() map[string]*serf.Serf {
  	segments := make(map[string]*serf.Serf, len(s.segmentLAN)+1)
  	segments[""] = s.serfLAN
  	for name, segment := range s.segmentLAN {
  		segments[name] = segment
  	}
  
  	return segments
  }
docs: // LANSegments returns a map of LAN segments by name