Method _getPack

lib/cache/PackFileCacheStrategy.js:1216–1221

* Returns pack. * @returns {Promise<Pack>} pack

()

	 * @returns {Promise<Pack>} pack
	 */
	_getPack() {
		if (this.packPromise === undefined) {
			this.packPromise = this.storePromise.then(() => this._openPack());
		}
		return this.packPromise;
	}

	/**
	 * Returns the pack.