public static MetricsConsumer consumer(String id, MetricSet ... metricSets) {
        return new MetricsConsumer(id, new MetricSet(id + "-consumer-metrics", List.of(), List.of(metricSets)));
    }
@return map of metric with metric name as key
config-model/src/main/java/com/yahoo/vespa/model/admin/monitoring/MetricsConsumer.java