public Parser whenOther() {
        if (whenOtherParser == null) {
           FutureParser future = scoped("whenOther");
           whenOtherParser = future;
           future.setParser(
               sequence(
                   token("WHEN"),
                   token("OTHER"),
                   nestedStatements()
               )
           );
        }

        return whenOtherParser;
    }