GtkWidget *fct_selector = get_widget_assert (xml, "psppire-selector2");
GtkWidget *id_selector = get_widget_assert (xml, "psppire-selector3");
GtkWidget *fct_selector = get_widget_assert (xml, "psppire-selector2");
GtkWidget *id_selector = get_widget_assert (xml, "psppire-selector3");