docs: public final void parse(final SelectStatement selectStatement) {
          if (!lexerEngine.skipIfEqual(DefaultKeyword.ORDER)) {
              return;
          }
          List<OrderItem> result = new LinkedList<>();
          lexerEngine.skipIfEqual(OracleKeyword.SIBLINGS);
          lexerEngine.accept(DefaultKeyword.BY);
          do {
              Optional<OrderItem> orderItem = parseSelectOrderByItem(selectStatement);
              if (orderItem.isPresent()) {
                  result.add(orderItem.get());
              }
          } while (lexerEngine.skipIfEqual(Symbol.COMMA));
          selectStatement.getOrderByItems().addAll(result);
      }