public Parser multiplyStatement() {
        if (multiplyStatementParser == null) {
           FutureParser future = scoped("multiplyStatement");
           multiplyStatementParser = future;
           future.setParser(
               sequence(
                   token("MULTIPLY"),
                   choice(
                       multiplication_format1(),
                       multiplication_format2()
                   ),
                   optional(
                       sequence(
                           optional(
                               token("ON")
                           ),
                           token("SIZE"),
                           token("ERROR"),
                           nestedStatements()
                       )
                   ),
                   optional(
                       sequence(
                           token("NOT"),
                           optional(
                               token("ON")
                           ),
                           token("SIZE"),
                           token("ERROR"),
                           nestedStatements()
                       )
                   ),
                   optional(
                       token("END-MULTIPLY")
                   )
               )
           );
        }

        return multiplyStatementParser;
    }