thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: missing field `appendix`

[neostar]

While trying to convert my Karabiner XML file I received the following error:

thread 'main' panicked at 'called Result::unwrap() on an Err value: missing field appendix', libcore/result.rs:945:5
note: Run with RUST_BACKTRACE=1 for a backtrace.

I've attached the responsible files.

private.xml.txt
karabiner.json.txt

[Sartoric]

Got the same issue here.
It expects <appendix></appendix> parameter for each <item> node.

I guess that nested structure isn't supported (yet). Am I right ?
I mean something like

private.xml.txt

Ignore the old __KeyToKey__