func addPeer(ch *tchannel.Channel, hostPort string) {
	peers := ch.GetSubChannel(hyperbahnServiceName).Peers()
	peers.Add(hostPort)
}
func addPeer(ch *tchannel.Channel, hostPort string) {
	peers := ch.GetSubChannel(hyperbahnServiceName).Peers()
	peers.Add(hostPort)
}
// addPeer adds a peer to the Hyperbahn subchannel.
// TODO(prashant): Start connections to the peers in the background.