Method addFallback

lib/LazyBarrel.js:113–118

* Registers a star re-export request key. * @param {string} requestKey request key

(requestKey)

	 * @param {string} requestKey request key
	 */
	addFallback(requestKey) {
		if (this._fallbackRequests === undefined) {
			this._fallbackRequests = new Set();
		}
		this._fallbackRequests.add(requestKey);
	}

	/**
	 * Returns whether nothing is deferred.