+@end // interface wxNSApplicationDelegate : NSObject
+WX_DECLARE_GET_OBJC_CLASS(wxNSApplicationDelegate,NSObject)
+
+// ========================================================================
+// wxNSApplicationObserver
+// ========================================================================
+/*!
+ @class wxNSApplicationObserver
+ @discussion Observes most notifications sent by the NSApplication singleton.
+
+ wxCocoa will create a singleton instance of this class upon startup and register it with the default notification center to
+ listen for several events sent by the NSApplication singleton.
+
+ Because there can be any number of notification observers, this method allows wxCocoa to function properly even when it is
+ running as a plugin of some other (most likely not wxWidgets) application.
+*/
+@interface wxNSApplicationObserver : NSObject
+{
+}
+
+// Methods defined as (but not used here) as NSApplication delegate methods.