vChewing-macOS/Installer/CocoaDialog.app/Contents/Resources/MainMenu.nib/classes.nib

{
    IBClasses = (
        {CLASS = AppController; LANGUAGE = ObjC; SUPERCLASS = NSObject; }, 
        {CLASS = FirstResponder; LANGUAGE = ObjC; SUPERCLASS = NSObject; }
    ); 
    IBVersion = 1; 
}