GtkWidget *sort = get_widget_assert (sfd->xml, "split-radiobutton3");
GtkWidget *layered = get_widget_assert (sfd->xml, "split-radiobutton1");
gint n_vars = append_variable_names (varlist,
GtkWidget *sort = get_widget_assert (sfd->xml, "split-radiobutton3");
GtkWidget *layered = get_widget_assert (sfd->xml, "split-radiobutton1");
gint n_vars = append_variable_names (varlist,