for _, x := range xl {
		if y.subsetOf(x) {
			return true
		}
	}
	return false
}

// subsetOf reports whether xl ⊆ yl.
func (xl termlist) subsetOf(yl termlist) bool {
	if yl.isEmpty() {
		return xl.isEmpty()
	}

	// each term x of xl must be a subset of yl
	for _, x := range xl {
		if !yl.supersetOf(x) {
			return false // x is not a subset yl
		}
	}
	return true

{{- $subsets := .Subsets }}
{{- $cluster := .Cluster }}
{{- range $i, $subset := $subsets }}
apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ $.Service }}-{{ $subset.Version }}
spec:
  replicas: 1
  selector:
    matchLabels:
      istio.io/test-vm: {{ $.Service }}
      istio.io/test-vm-version: {{ $subset.Version }}
  template:
    metadata:
      annotations:

        host: "multiversion"
        subset: "vistio"
  - name: "legacy-by-default"
    route:
    - destination:
        host: "multiversion"
        subset: "vlegacy"
---
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: "multiversion"
  annotations:
    test-suite: "automtls-partial-sidecar-dr-no-tls"
spec:
  host: "multiversion"
  subsets:
  - name: "vistio"
    labels:

        host: "multiversion"
        subset: "vistio"
  - name: "legacy-by-default"
    route:
    - destination:
        host: "multiversion"
        subset: "vlegacy"
---
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: "multiversion"
  annotations:
    test-suite: "automtls-partial-dr-disable"
spec:
  host: "multiversion"
  subsets:
  - name: "vistio"
    labels:

            regex: "b.*"
        sourceLabels:
          version: v1
      route:
      - destination:
          host: regex.extsvc.com
          subset: v2
        weight: 100
    - route:
      - destination:
          host: regex.extsvc.com
          subset: v1

spec:
  hosts:
    - c-weighted.extsvc.com
  http:
    - route:
      - destination:
          host: c-weighted.extsvc.com
          subset: v1
        weight: 75
      - destination:
          host: c-weighted.extsvc.com
          subset: v2

  namespace: default
spec:
  hosts:
  - ratings
  http:
  - route:
    - destination:
        host: ratings
        subset: v1
---
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: ratings
  namespace: default
spec:
  host: ratings
  subsets:
  - name: v1
    labels:

      labels:
        version: v1

---
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: websocket
  namespace: testns
spec:
  host: websocket.test.istio.io
  subsets:
    - name: v1
      labels:
        version: v1


---

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: websocket-route
  namespace: testns
spec:
  hosts:

	if len(endpoints.Subsets) > 0 {
		subset := endpoints.Subsets[0]
		for i := range subset.Ports {
			endpointSlice.Ports = append(endpointSlice.Ports, discovery.EndpointPort{
				Port:     &subset.Ports[i].Port,
				Name:     &subset.Ports[i].Name,
				Protocol: &subset.Ports[i].Protocol,
			})
		}

		if allAddressesIPv6(append(subset.Addresses, subset.NotReadyAddresses...)) {

		return nil, err
	}
	if len(eps.Subsets) == 0 {
		return nil, errors.NewServiceUnavailable(fmt.Sprintf("no endpoints available for service %q", svc.Name))
	}

	// Pick a random Subset to start searching from.
	ssSeed := rand.Intn(len(eps.Subsets))

	// Find a Subset that has the port.
	for ssi := 0; ssi < len(eps.Subsets); ssi++ {
		ss := &eps.Subsets[(ssSeed+ssi)%len(eps.Subsets)]
		if len(ss.Addresses) == 0 {
			continue