* @return array Array of errors, each error formatted as
* array(messagekey, param1, param2, ...).
* On success, the array is empty. This array can also be passed to
* OutputPage::showPermissionsErrorPage().
*/
public function doRollback(
* @return array Array of errors, each error formatted as
* array(messagekey, param1, param2, ...).
* On success, the array is empty. This array can also be passed to
* OutputPage::showPermissionsErrorPage().
*/
public function doRollback(