+ public LocalThreePhaseCommitCohort onTransactionReady(@Nonnull DOMStoreWriteTransaction tx,
+ @Nullable Exception operationError) {
+ Preconditions.checkArgument(tx instanceof SnapshotBackedWriteTransaction);
+ if (operationError != null) {
+ return new LocalChainThreePhaseCommitCohort((SnapshotBackedWriteTransaction<TransactionIdentifier>)tx,
+ operationError);
+ }
+