}
	}
	return nil
}

func (j *join[T]) List() []T {
	res := []T{}
	found := sets.New[Key[T]]()
	for _, c := range j.collections {
		for _, i := range c.List() {
			key := GetKey(i)
			if !found.InsertContains(key) {
				// Only keep it if it is the first time we saw it, as our merging mechanism is to keep the first one
				res = append(res, i)
			}
		}
	}
	return res
}

// debugging
func (c *suiteContext) allocateContextID(prefix string) string {
	c.contextMu.Lock()
	defer c.contextMu.Unlock()

	candidate := prefix
	discriminator := 0
	for {
		if !c.contextNames.InsertContains(candidate) {
			return candidate
		}

		candidate = fmt.Sprintf("%s-%d", prefix, discriminator)
		discriminator++
	}
}

	certMap := sets.New[string]()

	tb.mutex.Lock()
	defer tb.mutex.Unlock()

	for _, configSource := range tb.sourceConfig {
		for _, cert := range configSource.Certs {
			if !certMap.InsertContains(cert) {
				mergeCerts = append(mergeCerts, cert)
			}
		}
	}
	tb.mergedCerts = mergeCerts
	sort.Strings(tb.mergedCerts)
}

	if len(suites) == 0 {
		return nil
	}
	ret := make([]string, 0, len(suites))
	validCiphers := sets.New[string]()
	for _, s := range suites {
		if IsValidCipherSuite(s) {
			if !validCiphers.InsertContains(s) {
				ret = append(ret, s)
			} else if log.DebugEnabled() {
				log.Debugf("ignoring duplicated cipherSuite: %q", s)
			}
		} else if log.DebugEnabled() {

		log.Debugf("MergeGateways: merging gateway %q :\n%v", gatewayName, gatewayCfg)
		snames := sets.String{}
		for _, s := range gatewayCfg.Servers {
			if len(s.Name) > 0 {
				if snames.InsertContains(s.Name) {
					log.Warnf("Server name %s is not unique in gateway %s and may create possible issues like stat prefix collision ",
						s.Name, gatewayName)
				}
			}
			if s.Port == nil {

	got := sets.New[string]()
	for wname := range addresses {
		wl := a.Lookup(wname)
		if len(wl) == 0 {
			removed = append(removed, wname)
		} else {
			for _, addr := range wl {
				if !got.InsertContains(addr.ResourceName()) {
					res = append(res, addr)
				}
			}
		}
	}
	return res, sets.New(removed...)
}

func (a *index) ServicesForWaypoint(key model.WaypointKey) []model.ServiceInfo {

	found := sets.New[endpointKey]()
	for _, eps := range e.endpointsByServiceAndSlice[hostname] {
		for _, ep := range eps {
			key := endpointKey{ep.Address, ep.ServicePortName}
			if found.InsertContains(key) {
				// This a duplicate. Update() already handles conflict resolution, so we don't
				// need to pick the "right" one here.
				continue
			}
			endpoints = append(endpoints, ep)
		}
	}

				errs = AppendValidation(errs, fmt.Errorf("service entry port may not be null"))
				continue
			}
			if servicePorts.InsertContains(port.Name) {
				errs = AppendValidation(errs, fmt.Errorf("service entry port name %q already defined", port.Name))
			}
			if servicePortNumbers.InsertContains(port.Number) {
				errs = AppendValidation(errs, fmt.Errorf("service entry port %d already defined", port.Number))
			}

	register func(f erasedEventHandler),
) {
	i.d = append(i.d, d)

	// For any new collections we depend on, start watching them if its the first time we have watched them.
	if !i.collectionDependencies.InsertContains(d.id) {
		i.log.WithLabels("collection", d.collectionName).Debugf("register new dependency")
		syncer.WaitUntilSynced(i.stop)
		register(func(o []Event[any], initialSync bool) {
			i.onSecondaryDependencyEvent(d.id, o)

	}
	return res, nil
}

func removeDuplicates(values []string) []string {
	set := sets.New[string]()
	newValues := make([]string, 0, len(values))
	for _, v := range values {
		if !set.InsertContains(v) {
			newValues = append(newValues, v)
		}
	}
	return newValues