* Check if any previously added task requires rollback.
* Rollback is necessary if just single task requires rollback.
* @return
* Check if any previously added task requires rollback.
* Rollback is necessary if just single task requires rollback.
* @return
* It does not matter if any of the tasks requires rollback.
* All previously added tasks will be rolled back and removed from this processor.
* @return
* It does not matter if any of the tasks requires rollback.
* All previously added tasks will be rolled back and removed from this processor.
* @return
* Rollback all tasks in case any task has failed.
* If rollback is necessary, all previously added tasks will be rolled back and removed from this processor.
* @return
* Rollback all tasks in case any task has failed.
* If rollback is necessary, all previously added tasks will be rolled back and removed from this processor.
* @return