public Parser displayDeviceFormat() {
        if (displayDeviceFormatParser == null) {
           FutureParser future = scoped("displayDeviceFormat");
           displayDeviceFormatParser = future;
           future.setParser(
               sequence(
                   plus(
                       choice(
                           identifier(),
                           literal()
                       )
                   ),
                   optional(
                       uponClause()
                   ),
                   optional(
                       withNoAdvancing()
                   ),
                   optional(
                       onException()
                   ),
                   optional(
                       notOnException()
                   )
               )
           );
        }

        return displayDeviceFormatParser;
    }