Hi Marc, I am rather confused by what you are after. A writer is a writer, all you need to know is whether it worked and if it didn't what the error was - which is what WriteResult is all about. To add extra ability to return a pointer to a node is crazy, what are end users supposed to do when they implement their own writer implementations? If seems likely your answer will be something like "it means I can do something the code was never intended to do" and my answer would be "and that would be a feature that no one ever in the history of the OSG has requested apart from now."
It really sounds like you are trying to do something in a awkward way. If you want to ended and decode streams that you can use a custom like the zip, curl and archive plugins do. Robert.
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