clean(match = "**") {
		this.metrics.increment(METRIC.MOLECULER_CACHER_CLEAN_TOTAL);
		const timeEnd = this.metrics.timer(METRIC.MOLECULER_CACHER_CLEAN_TIME);

		const matches = Array.isArray(match) ? match : [match];
		this.logger.debug(`CLEAN ${matches.join(", ")}`);

		this.cache.keys().forEach(key => {
			if (matches.some(match => utils.match(key, match))) {
				this.logger.debug(`REMOVE ${key}`);
				this.cache.del(key);
			}
		});
		timeEnd();

		return this.broker.Promise.resolve();
	}
Clean cache. Remove every key by match
@param {string|Array<string>} match string. Default is "**"
@returns {Promise}

@memberof MemoryLRUCacher