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Listener methods

This is the collection of listener methods within the Metrics interface. There are only three listener methods, addMetricIdsListener, addMetricListener, and delListener.

addMetricIdsListener

The addMetricIdsListener method registers a listener function with the Metrics object that will be called whenever a Metric definition is added or removed.

addMetricListener

The addMetricListener method registers a listener function with the Metrics object that will be called whenever the value of a specified Metric changes.

delListener

The delListener method removes a listener that was previously added to the Metrics object.