GtkWidget *stats_treeview = get_widget_assert (xml, "statistics");
psppire_checkbox_treeview_populate (PSPPIRE_CHECKBOX_TREEVIEW (stats_treeview),
B_DS_DEFAULT,
N_DESCRIPTIVE_STATS, stats);
act->stats = gtk_tree_view_get_model (GTK_TREE_VIEW (stats_treeview));
GtkWidget *stats_treeview = get_widget_assert (xml, "statistics");
psppire_checkbox_treeview_populate (PSPPIRE_CHECKBOX_TREEVIEW (stats_treeview),
B_DS_DEFAULT,
N_DESCRIPTIVE_STATS, stats);
act->stats = gtk_tree_view_get_model (GTK_TREE_VIEW (stats_treeview));