fonttools/robofab/Data/GlyphViewer.app/Contents/Resources/MainMenu.nib/classes.nib

{
    IBClasses = (
        {
            ACTIONS = {copyFLString = id; saveGlyphsAsTiffFiles = id; }; 
            CLASS = FirstResponder; 
            LANGUAGE = ObjC; 
            SUPERCLASS = NSObject; 
        }
    ); 
    IBVersion = 1; 
}