* @param gaugeName The name of the gauge.
* @param delta the ammount to subtract from a gauge value.
*/
public void decGauge(String gaugeName, long delta) {
MutableGaugeLong gaugeInt = metricsRegistry.getLongGauge(gaugeName, 0l);
gaugeInt.decr(delta);
}
/**
* Increment a named counter by some value.
*