code: func (c *Cluster) AddBGPPeer(peer *seesaw.Host) error {
  	key := peer.Hostname
  	if _, ok := c.BGPPeers[key]; ok {
  		return fmt.Errorf("Cluster %q already contains peer %q", c.Site, key)
  	}
  	c.BGPPeers[key] = peer
  	return nil
  }
docs: // AddBGPPeer adds a BGP peer to a Seesaw Cluster.