+NSString* const NSWindowWillExitFullScreenNotification =
+ @"NSWindowWillExitFullScreenNotification";
+
+NSString* const NSWindowDidEnterFullScreenNotification =
+ @"NSWindowDidEnterFullScreenNotification";
+
+NSString* const NSWindowDidExitFullScreenNotification =
+ @"NSWindowDidExitFullScreenNotification";
+
+NSString* const NSWindowDidChangeBackingPropertiesNotification =
+ @"NSWindowDidChangeBackingPropertiesNotification";
+