decrement(name, labels, value = 1, timestamp) {
		if (!this.opts.enabled) return null;

		const item = this.getMetric(name);
		if (!isFunction(item.decrement))
			throw new Error("Invalid metric type. Decrementing works only with gauge metric type.");

		return item.decrement(labels, value, timestamp);
	}
Decrement a metric value.

@param {String} name
@param {Object?} labels
@param {number} [value=1]
@param {Number?} timestamp
@returns
@memberof MetricRegistry