Method enqueue

lib/util/Queue.js:39–41

* Enqueues an item, moving nothing if that value is already present. * @param {T} item The element to add. * @returns {void}

(item)

	 * @returns {void}
	 */
	enqueue(item) {
		this._set.add(item);
	}

	/**
	 * Removes and returns the oldest enqueued item.