private static void addMetric(Set<Metric> metrics, String metricName, Iterable<String> aggregateSuffices) {
        for (String suffix : aggregateSuffices) {
            metrics.add(new Metric(metricName + "." + suffix));
        }
    }
Encapsulates vespa service metrics.

@author gjoranv
@author yngve
metrics/src/main/java/ai/vespa/metrics/set/Vespa9VespaMetricSet.java