I'm auditing these:
* XML DBus interfaces for accessibility in at-spi2-core.
* The copy in registryd.
* The copy in atk-adaptor.
* The copies in toolkits (GTK4, Qt5+)
* The respective implementations.
They all have differences and don't match! The root cause is that nothing was ever properly autogenerated from the base XML, because there was no infrastructure for it, and later no one to work on doing that.