return ShardKey{Cluster: instance.Cluster(), Provider: instance.Provider()}
}

// ShardKey is the key for EndpointShards made of a key with the format "provider/cluster"
type ShardKey struct {
	Cluster  cluster.ID
	Provider provider.ID
}

func (sk ShardKey) String() string {
	return string(sk.Provider) + "/" + string(sk.Cluster) // format: %s/%s
}

// MarshalText implements the TextMarshaler interface (for json key usage)

		expected: []message{
			{msg.VirtualServiceUnreachableRule, "VirtualService duplicate-match"},
			{msg.VirtualServiceUnreachableRule, "VirtualService foo/sample-foo-cluster01"},
			{msg.VirtualServiceIneffectiveMatch, "VirtualService almost-duplicate-match"},
			{msg.VirtualServiceIneffectiveMatch, "VirtualService duplicate-match"},