subscribeBalancedEvent(event, group) {
		const topic = `${this.prefix}.${PACKET_EVENT}B.${group}.${event}`;

		const opts = this.client
			.subscriptionOptions()
			.setDeliverAllAvailable()
			.setDurableName(PACKET_EVENT + "B");
		const subscription = this.client.subscribe(topic, group, opts);

		subscription.on("message", msg => this.receive(PACKET_EVENT, msg.getRawData()));
		this.subscriptions.push(subscription);
	}
Subscribe to balanced event command

@param {String} event
@param {String} group
@memberof StanTransporter