The gio.settings.Settings key must be of the same type as the
propertySpaceDrawer:matrix property, that is, "au".
The gio.settings.Settings.bind function cannot be used, because the default GIO
mapping functions don't support glib.variant.VariantG properties (maybe it will be
supported by a future GIO version, in which case this function can be
deprecated).
Binds the propertySpaceDrawer:matrix property to a gio.settings.Settings key.
The gio.settings.Settings key must be of the same type as the propertySpaceDrawer:matrix property, that is, "au".
The gio.settings.Settings.bind function cannot be used, because the default GIO mapping functions don't support glib.variant.VariantG properties (maybe it will be supported by a future GIO version, in which case this function can be deprecated).