@Override
        public void set(String key, Number val, Metric.Context ctx) {
            values.putIfAbsent(key, new HashMap<>());
            values.get(key).put(((Context) ctx).point, val);
        }
Stores all added or set values for each metric and context.
configserver/src/test/java/com/yahoo/vespa/config/server/ApplicationRepositoryTest.java