xfce_titled_dialog_set_subtitle cannot be called on a generic GtkDialog.
xfce_titled_dialog_set_subtitle cannot be called on a generic GtkDialog.

xfce-mirror/xfce4-genmon-plugin,dnschneid/xfce4-genmon-plugin,tonypaulic/xfce4-genmon-plugin,dnschneid/xfce4-genmon-plugin,tonypaulic/xfce4-genmon-plugin,xfce-mirror/xfce4-genmon-plugin,dnschneid/xfce4-genmon-plugin,xfce-mirror/xfce4-genmon-plugin,tonypaulic/xfce4-genmon-plugin