GtkFontChooser: properties "level", "font-features" and "language" has wrong version
Its says "Since: 3.22.30" while added only in "3.24.1" https://gitlab.gnome.org/GNOME/gtk/blob/3.22.30/gtk/gtkfontchooser.c#L102 https://gitlab.gnome.org/GNOME/gtk/blob/3.24.1/gtk/gtkfontchooser.c#L113
That cause problem in using rust binging on 3.22.30 https://github.com/gtk-rs/gtk/issues/794#issuecomment-483460392
PS. Maybe enum GtkFontChooserLevel also need version description