func newMatcher(fc *listener.FilterChain, l *listener.Listener) []string {
	if l.FilterChainMatcher == nil {
		return []string{getMatches(fc.GetFilterChainMatch())}
	}
	switch v := l.GetFilterChainMatcher().GetOnNoMatch().GetOnMatch().(type) {
	case *matcher.Matcher_OnMatch_Action:
		if v.Action.GetName() == fc.GetName() {
			return []string{"UNMATCHED"}
		}
	case *matcher.Matcher_OnMatch_Matcher:
		ms, f := recurse(fc.GetName(), v.Matcher)