presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/RaptorConnector.java/RaptorConnector/commit
class RaptorConnector:    @Override
    public void commit(ConnectorTransactionHandle transaction)
    {
        checkArgument(transactions.remove(transaction) != null, "no such transaction: %s", transaction);
        finishDelete(((RaptorTransactionHandle) transaction).getUuid());
    }