TGMarker getError() has unexpected type in swift

[brianLeeson]

TGMarker's getError method returns a Bool depending on if the marker's usage resulted in internal errors. In swift the declaration changes to func getError() throws. I've read in a previous issue about why this is.

My question is about the expected behavior (since the documentation carried from Objc into Swift isn't accurate). Does getError throw the internal error that was generated and not throw any error if no error was generated?