[Docutils-users] Getting document's rawsource

[Arthur <fea...@gm...>]

I'm trying to solve next one problem:

1. Load rst source, and parse it into doctree (publish_doctree)
2. Modify tree in memory
3. Save the raw rst source of modified tree back to disk

Unfortunately, I've not found any way to get the document's rawsource.
When I try to access document.rawsource, it returns an empty string. Any other
elements rawsource property returns just text without formatting (list items
without bullet markers, etc.)
How can this be done? 
May be i'm just stupid :(