public Parser screenControlIs() {
        if (screenControlIsParser == null) {
           FutureParser future = scoped("screenControlIs");
           screenControlIsParser = future;
           future.setParser(
               sequence(
                   token("SCREEN"),
                   token("CONTROL"),
                   optional(
                       token("IS")
                   ),
                   identifier()
               )
           );
        }

        return screenControlIsParser;
    }