public Parser dataAddressIdentifier() {
        if (dataAddressIdentifierParser == null) {
           FutureParser future = scoped("dataAddressIdentifier");
           dataAddressIdentifierParser = future;
           future.setParser(
               sequence(
                   token("ADDRESS"),
                   optional(
                       token("OF")
                   ),
                   identifier()
               )
           );
        }

        return dataAddressIdentifierParser;
    }