return &Builder{builder: b}
}

func (b *Builder) BuildTCP() []*listener.Filter {
	if b == nil || b.builder == nil {
		return nil
	}
	if b.tcpBuilt {
		return b.tcpFilters
	}
	b.tcpBuilt = true
	b.tcpFilters = b.builder.BuildTCP()

	return b.tcpFilters
}

func (b *Builder) BuildHTTP(class networking.ListenerClass) []*hcm.HttpFilter {
	if b == nil || b.builder == nil {
		return nil
	}

	if res := t.telemetryFilters(proxy, class, networking.ListenerProtocolHTTP, svc); res != nil {
		return res.([]*hcm.HttpFilter)
	}
	return nil
}

// TCPFilters computes the TCPFilters for a given proxy/class
func (t *Telemetries) TCPFilters(proxy *Proxy, class networking.ListenerClass, svc *Service) []*listener.Filter {
	if res := t.telemetryFilters(proxy, class, networking.ListenerProtocolTCP, svc); res != nil {

func buildNetworkFiltersStack(p protocol.Instance, tcpFilter *listener.Filter, statPrefix string, clusterName string) []*listener.Filter {
	filterstack := make([]*listener.Filter, 0)
	switch p {
	case protocol.Mongo:
		if features.EnableMongoFilter {
			filterstack = append(filterstack, buildMongoFilter(statPrefix), tcpFilter)
		} else {
			filterstack = append(filterstack, tcpFilter)
		}
	case protocol.Redis:

		IdleTimeout:      parseDuration(lb.node.Metadata.IdleTimeout),
	}
	tcpFilter := setAccessLogAndBuildTCPFilter(lb.push, lb.node, tcpProxy, istionetworking.ListenerClassSidecarInbound, fcc.policyService)
	networkFilterstack := buildNetworkFiltersStack(fcc.port.Protocol, tcpFilter, statPrefix, fcc.clusterName)