This is not a perfect answer, but it does work.....
Let's say you are using the Pagination example, and want to
get a PDF version of it.
You can use a printerdriver to print to pdf from the client.
Then to print your TextFlow, you can add your content to
pages (which are Sprites) as in the Pagination example.
Create a PrintJob object, start the printjob, and choose your
PDF printer driver, and in your code, add each page into the
printjob.
Once all are added, send the printjob and you will have a pdf
file of your TextFlow.
Your code would look something like this...