How to use the measured-core.SettableGauge function in measured-core

getOrCreateSettableGauge(name, dimensions, publishingIntervalInSeconds) {
    validateSettableGaugeOptions(name, dimensions, publishingIntervalInSeconds);

    let settableGauge;
    if (this._registry.hasMetric(name, dimensions)) {
      settableGauge = this._registry.getMetric(name, dimensions);
    } else {
      settableGauge = new SettableGauge();
      const key = this._registry.putMetric(name, settableGauge, dimensions);
      this._reporters.forEach(reporter => reporter.reportMetricOnInterval(key, publishingIntervalInSeconds));
    }

    return settableGauge;
  }