return nil
	}
	if class == networking.ListenerClassSidecarOutbound {
		// Only applies to inbound and gateways
		return nil
	}
	if b.httpBuilt {
		return b.httpFilters
	}
	b.httpBuilt = true
	b.httpFilters = b.builder.BuildHTTP()

	return b.httpFilters

		}
		if lp.Operation == networking.EnvoyFilter_Patch_ADD {
			applied = true
			httpconn.HttpFilters = append(httpconn.HttpFilters, proto.Clone(lp.Value).(*hcm.HttpFilter))
		} else if lp.Operation == networking.EnvoyFilter_Patch_INSERT_FIRST {
			httpconn.HttpFilters = append([]*hcm.HttpFilter{proto.Clone(lp.Value).(*hcm.HttpFilter)}, httpconn.HttpFilters...)
		} else if lp.Operation == networking.EnvoyFilter_Patch_INSERT_AFTER {

	if want.TotalMatch {
		if want.NetworkFilters != nil {
			assert.Equal(t, want.NetworkFilters, haveNetwork, context("network filters should be equal"))
		}
		if want.HTTPFilters != nil {
			assert.Equal(t, want.HTTPFilters, haveHTTP, context("http should be equal"))
		}
	} else {
		if missing := sets.SortedList(sets.New(want.NetworkFilters...).Difference(sets.New(haveNetwork...))); len(missing) > 0 {

		}
	}
	h := lb.buildHTTPConnectionManager(httpOpts)

	// Last filter must be router.
	router := h.HttpFilters[len(h.HttpFilters)-1]
	h.HttpFilters = append(pre, h.HttpFilters[:len(h.HttpFilters)-1]...)
	h.HttpFilters = append(h.HttpFilters, post...)
	h.HttpFilters = append(h.HttpFilters, router)

	filters = append(filters, &listener.Filter{
		Name:       wellknown.HTTPConnectionManager,

						{
							Name: wellknown.HTTPConnectionManager,
							ConfigType: &listener.Filter_TypedConfig{
								TypedConfig: protoconv.MessageToAny(&hcm.HttpConnectionManager{
									HttpFilters: []*hcm.HttpFilter{
										{Name: "http-filter-to-be-replaced"},
										{Name: "another-http-filter"},
									},
								}),
							},
						},
					},
				},
			},
		},

				{
					Name:           "0.0.0.0_8080",
					Type:           listenertest.MTLSHTTP,
					HTTPFilters:    httpFilters,
					NetworkFilters: httpNetworkFilters,
					TotalMatch:     true,
				},
				{
					Name:           "0.0.0.0_8080",
					Type:           listenertest.PlainTCP,
					HTTPFilters:    httpFilters,
					NetworkFilters: httpNetworkFilters,
					TotalMatch:     true,
				},
				{

		}
	}

	// TypedPerFilterConfig in route needs these filters.
	filters = append(filters, xdsfilters.Fault, xdsfilters.Cors)
	if !httpOpts.isWaypoint {
		filters = append(filters, lb.push.Telemetry.HTTPFilters(lb.node, httpOpts.class, nil)...)
	}
	// Add EmptySessionFilter so that it can be overridden at route level per service.

										PathSpecifier: &route.RouteMatch_Prefix{Prefix: "/"},
									},
									Action: &route.Route_NonForwardingAction{},
								}},
							}},
						},
					},
					HttpFilters: fc,
				}),
			},
		}},
	}
	if tlsContext != nil {
		out.TransportSocket = &core.TransportSocket{
			Name:       transportSocketName,

				},
			},
			expectedListener: listenertest.ListenerTest{FilterChains: []listenertest.FilterChainTest{
				{
					NetworkFilters: []string{
						wellknown.HTTPConnectionManager,
					},
					HTTPFilters: []string{
						xdsfilters.MxFilterName,
						xdsfilters.Alpn.GetName(),
						xdsfilters.Fault.GetName(), xdsfilters.Cors.GetName(), wellknown.Router,
					},
				},
			}},
		},
		{

		serverSpec.Disabled = true
	}

	cfg := TracingConfig{
		ClientSpec: clientSpec,
		ServerSpec: serverSpec,
	}
	return &cfg
}

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