f := &hcm.HttpFilter{
					Name:       xds.StatsFilterName,
					ConfigType: &hcm.HttpFilter_TypedConfig{TypedConfig: waypointStatsConfig},
				}
				res = append(res, f)
			} else {
				if statsCfg := generateStatsConfig(class, cfg); statsCfg != nil {
					f := &hcm.HttpFilter{
						Name:       xds.StatsFilterName,
						ConfigType: &hcm.HttpFilter_TypedConfig{TypedConfig: statsCfg},
					}
					res = append(res, f)
				}