in AmazonChimeSDKDemo/AmazonChimeSDKDemo/VideoModel.swift [482:489]
func updateVideoSourceSubscription() {
if videoSourcesToBeSubscribed.isEmpty && videoSourcesToBeUnsubscribed.isEmpty {
return
}
audioVideoFacade.updateVideoSourceSubscriptions(addedOrUpdated: videoSourcesToBeSubscribed, removed: Array(videoSourcesToBeUnsubscribed))
videoSourcesToBeSubscribed.removeAll()
videoSourcesToBeUnsubscribed.removeAll()
}