SfBAlertDelegate alert function is never called

[darchivist]

I'm using the 1.3 release of the SDK in a test Swift application. I've declared my class as a SfBAlertDelegate, and provided the requisite didReceive(_ alert: SfBAlert) function (which just debugPrints a comment). I've also set the shared application and conversation alertDelegate to self.

Perhaps this is normal. if so, what, exactly, would trigger an SfBAlert? Can I use it to detect when a new user has joined a conversation?