@Override
    public void printStackTrace(PrintWriter pw) {
        super.printStackTrace(pw);
        if (nestedThrowable != null) {
            nestedThrowable.printStackTrace(pw);
        }
    }
Text to include in a message that will be sent to the sender of the packet that got
rejected. If no text is specified then no message will be sent to the user.
xmppserver/src/main/java/org/jivesoftware/openfire/filetransfer/FileTransferRejectedException.java