byte[] buf = this.txn_buf;
        this.txn_buf = null;
        return buf;
    }


    /**
     * @return the subCommand
     */
    public final byte getSubCommand () {
        return this.subCommand;
    }


    /**
     * @param subCommand
     *            the subCommand to set
     */
    public final void setSubCommand ( byte subCommand ) {