private static Consumer.Metric.Dimension.Builder toMetricDimensionBuilder(String name, String value) {
        return new Consumer.Metric.Dimension.Builder()
                .key(name)
                .value(value);
    }
@param userConsumers the consumers set up by the user in services.xml
@return a list of consumer builders (a mapping from consumer to its metrics)
config-model/src/main/java/com/yahoo/vespa/model/admin/metricsproxy/ConsumersConfigGenerator.java