/**
* Cancels the transaction. Transactions can only be cancelled if it was not yet committed.
- * Invoking cancel() on failed or already canceled will have no effect, and transaction is considered cancelled.
+ * Invoking cancel() on failed or already cancelled will have no effect, and transaction is considered cancelled.
* Invoking cancel() on finished transaction (future returned by {@link #commit()} already successfully completed)
* will always fail (return false).
*