}

func (p clusterPatcher) patch(hosts []host.Name, c *cluster.Cluster) *discovery.Resource {
	cluster := p.doPatch(hosts, c)
	if cluster == nil {
		return nil
	}
	return &discovery.Resource{Name: cluster.Name, Resource: protoconv.MessageToAny(cluster)}
}

func (p clusterPatcher) doPatch(hosts []host.Name, c *cluster.Cluster) *cluster.Cluster {
	if !envoyfilter.ShouldKeepCluster(p.pctx, p.efw, c, hosts) {

		return
	}

	p.append(prog, cond, true)
}

func (p *Parser) patch() {
	for _, patch := range p.toPatch {
		targetProg := p.labels[patch.label]
		if targetProg == nil {
			p.errorf("undefined label %s", patch.label)
			return
		}
		p.branch(patch.addr, targetProg)
	}
	p.toPatch = p.toPatch[:0]
}

func (p *Parser) branch(addr *obj.Addr, target *obj.Prog) {
	*addr = obj.Addr{

				run: func(t framework.TestContext, testTopology map[string]map[string]int) {
					echotest.New(t, all).
						WithDefaultFilters(1, 1).
						FromMatch(match.And(match.NotNaked, match.NotHeadless)).
						ToMatch(match.NotHeadless).
						RunToN(3, func(ctx framework.TestContext, from echo.Instance, dsts echo.Services) {
							srcKey := from.Config().ClusterLocalFQDN()
							if testTopology[srcKey] == nil {

	// To enable this optimization, following cmark-gfm, we declare by fiat
	// that more than maxBackticks backquotes is too many.
	if n > len(b.last) || b.scanned && b.last[n-1] < i+n {
		goto NoMatch
	}

	for end := i + n; end < len(s); {
		if s[end] != '`' {
			end++
			continue
		}
		estart := end
		for end < len(s) && s[end] == '`' {
			end++
		}
		m := end - estart