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It's ok to use `savedStateHandle` to get data as result from child compose to parent compose.
But the opposite? I can simple using save data into current `savedStateHandle` then recovery using previews `backstack` `savedStateHandle`.
Is that ok too?

I don't remember exactly why this was causing trouble for me but I ended up using SharedViewModel.

I implemented a QR Scanner in `Screen B` which get's invoked from `Screen A`.

On QR Scan, it should send back the result to `Screen A`.

But yeah, I'm using SharedVM.