So nullness markers may come to Java via project Valhalla after all? https://mail.openjdk.org/pipermail/valhalla-spec-experts/2023-February/002223.html
Nullness markers to enable flattening

@sdeleuze Indeed it's much more useful than .val/.ref even outside value object.
One of the best features of kotlin.
@sdeleuze
Whoa, this would be huge