return addr.Address
	}
	if pipe := host.Address.GetPipe(); pipe != nil {
		return "unix://" + pipe.Path
	}
	if internal := host.Address.GetEnvoyInternalAddress(); internal != nil {
		switch an := internal.GetAddressNameSpecifier().(type) {
		case *core.EnvoyInternalAddress_ServerListenerName:
			return fmt.Sprintf("envoy://%s/%s", an.ServerListenerName, internal.EndpointId)
		}
	}
	return "unknown"
}

	}
	if addr := addr.GetPipe(); addr != nil {
		return addr.GetPath()
	}
	if internal := addr.GetEnvoyInternalAddress(); internal != nil {
		switch an := internal.GetAddressNameSpecifier().(type) {
		case *core.EnvoyInternalAddress_ServerListenerName:
			return fmt.Sprintf("envoy://%s/%s", an.ServerListenerName, internal.EndpointId)
		}
	}
	return "unknown"
}