### Question:
CommonMetricsFilter implements MeterFilter { protected String filter(String metricName) { return metricName.replace('_', '.'); } CommonMetricsFilter(K8sMetricsProperties k8sMetricsProperties, MetricsProperties properties); MeterFilterReply accept(Meter.Id id); void enableMetric(String metricName); void disableMetric(String metricName); String[] getPrefixes(); void setPrefixes(String[] prefixes); boolean isActionEnabled();  }### Answer:
@Test public void filter() { }