public Parser transformStatement() {
        if (transformStatementParser == null) {
           FutureParser future = scoped("transformStatement");
           transformStatementParser = future;
           future.setParser(
               sequence(
                   token("TRANSFORM"),
                   identifier(),
                   optional(
                       token("CHARACTERS")
                   ),
                   token("FROM"),
                   choice(
                       figurativeConstant(),
                       alphanumericLiteral(),
                       identifier()
                   ),
                   token("TO"),
                   choice(
                       figurativeConstant(),
                       alphanumericLiteral(),
                       identifier()
                   )
               )
           );
        }

        return transformStatementParser;
    }