Method clear

lib/util/LazySet.js:157–163

* Removes all items and clears every deferred merge queue.

()

	 * Removes all items and clears every deferred merge queue.
	 */
	clear() {
		this._set.clear();
		this._toMerge.clear();
		this._toDeepMerge.length = 0;
		this._needMerge = false;
		this._deopt = false;
	}

	/**
	 * Deletes an item after first materializing any deferred additions that may