https://www.mankier.com/1/gdbus-codegen
gdbus-codegen: D-Bus code and documentation generator | Man Page | Commands | glib2 | ManKier
gdbus-codegen is used to generate code and/or documentation for one or more D-Bus interfaces.
https://mail.gnome.org/archives/commits-list/2010-May/msg04660.html
[glib] GDBus: Use specific variant type in GetAll()
use specificglibvarianttypegetall
https://fuchsia.googlesource.com/third_party/glib/+/4e1488eebb2129c6e39162b56275d311f24216ab/gio/gdbus-2.0/codegen
gio/gdbus-2.0/codegen - third_party/glib - Git at Google
third partygiocodegen