public Parser programSpecifier() {
        if (programSpecifierParser == null) {
           FutureParser future = scoped("programSpecifier");
           programSpecifierParser = future;
           future.setParser(
               sequence(
                   token("PROGRAM"),
                   programName(),
                   optional(
                       sequence(
                           token("AS"),
                           literal()
                       )
                   )
               )
           );
        }

        return programSpecifierParser;
    }