/**
* Rollback a transaction to a named checkpoint
*
* @param checkpointName the name of the checkpoint, previously declared with {@see
* Handle#checkpoint}
*/
public Handle rollback(String checkpointName) {
final long start = System.nanoTime();
transactions.rollback(this, checkpointName);
log.logRollbackToCheckpoint((System.nanoTime() - start) / 1000000L, this, checkpointName);
return this;
}
