code: func (c *Client) GetLANCoordinate() (lib.CoordinateSet, error) {
  	lan, err := c.serf.GetCoordinate()
  	if err != nil {
  		return nil, err
  	}
  
  	cs := lib.CoordinateSet{c.config.Segment: lan}
  	return cs, nil
  }
docs: // GetLANCoordinate returns the network coordinate of the current node, as
  // maintained by Serf.