public Parser linesAtBottom() {
        if (linesAtBottomParser == null) {
           FutureParser future = scoped("linesAtBottom");
           linesAtBottomParser = future;
           future.setParser(
               sequence(
                   optional(
                       token("LINES")
                   ),
                   optional(
                       token("AT")
                   ),
                   token("BOTTOM"),
                   choice(
                       dataName(),
                       integer()
                   )
               )
           );
        }

        return linesAtBottomParser;
    }