public MetricName metricName(String name, String group) {
        return metricName(name, group, "", new HashMap<>());
    }
Create a MetricName with the given name, group and default tags specified in the metric configuration.

@param name        The name of the metric
@param group       logical group name of the metrics to which this metric belongs
clients/src/main/java/org/apache/kafka/common/metrics/Metrics.java