This interface contains the required methods (if any) from the protocol defined by NotificationCenter.NCWidgetProviding.

If you create objects that implement this interface, the implementation methods will automatically be exported to Objective-C with the matching signature from the method defined in the NotificationCenter.NCWidgetProviding protocol.

Optional methods (if any) are provided by the NotificationCenter.NCWidgetProviding_Extensions class as extension methods to the interface, allowing you to invoke any optional methods on the protocol.