public Parser serviceStatement() {
        if (serviceStatementParser == null) {
           FutureParser future = scoped("serviceStatement");
           serviceStatementParser = future;
           future.setParser(
               sequence(
                   token("SERVICE"),
                   choice(
                       token("LABEL"),
                       sequence(
                           token("RELOAD"),
                           identifier()
                       )
                   )
               )
           );
        }

        return serviceStatementParser;
    }