Automatically detects all S3 classes that have a specialized notify()
method
(like notify.MyNotifier
) and prints them as a character vector of class names
(e.g., "PushbulletNotifier"
, "TelegramNotifier"
).
Note that only classes defined and loaded at the time you call this function will appear. If you just created a new notifier in another file or package, ensure it's sourced/loaded first.