fallback := NewDestinationIP()
				fallback.Map["1.2.3.4"] = ToChain("chain")

				root := NewDestinationPort()
				root.OnNoMatch = ToMatcher(fallback.Matcher)
				return root
			},
			want: func() *matcher.Matcher {
				// root (dest ip):
				//   1.2.3.4: chain

				// fallback becomes root
				want := NewDestinationIP()
				want.Map["1.2.3.4"] = ToChain("chain")
				return want.Matcher
			},
		},
		{

	m.Map["'h2c'"] = pm.HTTP
	m.Map["'http/1.1'"] = pm.HTTP
	if features.HTTP10 {
		m.Map["'http/1.0'"] = pm.HTTP
	}
	m.OnNoMatch = pm.TCP
	return m.Matcher
}

func ToChain(name string) *matcher.Matcher_OnMatch {
	return &matcher.Matcher_OnMatch{
		OnMatch: &matcher.Matcher_OnMatch_Action{
			Action: &xds.TypedExtensionConfig{
				Name:        name,