func (router *Router) OnGossipUnicast(sender PeerName, msg []byte) error {
	return fmt.Errorf("unexpected topology gossip unicast: %v", msg)
}
func (router *Router) OnGossipUnicast(sender PeerName, msg []byte) error {
	return fmt.Errorf("unexpected topology gossip unicast: %v", msg)
}
func ( router * Router ) OnGossipUnicast ( sender PeerName , msg [ ] byte ) error { return fmt . Errorf ( " " , msg ) }
// OnGossipUnicast implements Gossiper, but always returns an error, as a
// router should only receive gossip broadcasts of TopologyGossipData.
OnGossipUnicast implements Gossiper but always returns an error as a router should only receive gossip broadcasts of TopologyGossipData .