It is your issue. What about doing it by yourself?
I do not have an example. I need to write one too. YOU have the DATA and can do it better. Additionally you are using b4a longer than me. I surely expect you know the language after 6 years.
My requirement is to get final node object in treeview. Also create back to the same structure.
I would like to share my idea with you.
I want to record a voice, voice file seems to big size as well as readable to all.
Save and transport by text , in destination convert to original format.