func subscribeToEvents(logger lager.Logger, bbsClient bbs.Client, subscriptionChan chan<- events.EventSource) {
logger.Info("subscribing-to-events")
eventSource, err := bbsClient.SubscribeToEvents()
if err != nil {
logger.Error("failed-subscribing-to-events", err)
subscriptionChan <- nil
} else {
logger.Info("subscribed-to-events")
subscriptionChan <- eventSource
}
}
