type XDSUpdater interface {
	// EDSUpdate is called when the list of endpoints or labels in a Service is changed.
	// For each cluster and hostname, the full list of active endpoints (including empty list)
	// must be sent. The shard name is used as a key - current implementation is using the
	// registry name.
	EDSUpdate(shard ShardKey, hostname string, namespace string, entry []*IstioEndpoint)