/**
 * Stores Google Analytics tracking script instances
 */
const advancedAdsGAInstances = {
	instances: [],

	/**
	 * Return instance for given blog id, creates and stores instance if it doesn't exists.
	 *
	 * @param {number} bId
	 * @return {AdvAdsGATracker}
	 */
	getInstance: function (bId) {
		if (typeof this.instances[bId] === 'undefined') {
			this.instances[bId] = new AdvAdsGATracker(
				bId,
				advads_gatracking_uids[bId]
			);
		}

		return this.instances[bId];
	},
};