### Question:
MetricsSupport implements Service { static JsonObject toJsonMeta(Registry... registries) { return toJson(MetricsSupport::toJsonMeta, registries); } private  MetricsSupport(Builder builder); static MetricsSupport create(); static MetricsSupport create(Config config); static Builder builder(); static String toPrometheusData(MetricID metricID, Metric metric, boolean withHelpType); static String toPrometheusData(String name, Metric metric, boolean withHelpType); void configureVendorMetrics(String routingName,
            Routing.Rules rules); void configureEndpoint(Routing.Rules rules); @Override void update(Routing.Rules rules);  }### Answer:
@Test void testJsonMetaAll() { JsonObject jsonObject = MetricsSupport.toJsonMeta(app); System.out.println("jsonObject = " + jsonObject); }
@Test void testJsonMetaMultiple() { JsonObject jsonObject = MetricsSupport.toJsonMeta(app, base); System.out.println("jsonObject = " + jsonObject); }