docs: private boolean isDdlDatas(List<EventData> eventDatas) {
          boolean result = false;
          for (EventData eventData : eventDatas) {
              result |= eventData.getEventType().isDdl();
              if (result && !eventData.getEventType().isDdl()) {
                  throw new LoadException("ddl/dml can't be in one batch, it's may be a bug , pls submit issues.",
                      DbLoadDumper.dumpEventDatas(eventDatas));
              }
          }
  
          return result;
      }