public Parser freeStatement() {
        if (freeStatementParser == null) {
           FutureParser future = scoped("freeStatement");
           freeStatementParser = future;
           future.setParser(
               sequence(
                   token("FREE"),
                   plus(
                       sequence(
                           optional(
                               sequence(
                                   token("ADDRESS"),
                                   optional(
                                       token("OF")
                                   )
                               )
                           ),
                           qualifiedDataName()
                       )
                   )
               )
           );
        }

        return freeStatementParser;
    }