*         .transformAsync((closer, transaction) -> transaction.queryClosingFuture("..."), executor)
 *         .transform((closer, result) -> result.get("userName"), directExecutor())
 *         .catching(DBException.class, e -> "no user", directExecutor())
 *         .finishToFuture();
 * }</pre>
 *
 * In this example, when the {@code userName} {@link Future} is done, the transaction and the query

            String service = null;

            if (request != null) {
                switch( request.command ) {
                    case ServerMessageBlock.SMB_COM_TRANSACTION:
                    case ServerMessageBlock.SMB_COM_TRANSACTION2:
                        switch( ((SmbComTransaction)request).subCommand & 0xFF ) {
                            case SmbComTransaction.TRANS2_GET_DFS_REFERRAL:

		copySourceRange   string // data for "X-Amz-Copy-Source-Range" header, contains the byte range offsets of data to be copied.
		uploadID          string // uploadID of the transaction.
		invalidPartNumber bool   // Sets an invalid multipart.
		maximumPartNumber bool   // Sets a maximum parts.
		accessKey         string
		secretKey         string
		// expected output.