+struct range_set *pspp_sheet_selection_get_range_set (PsppSheetSelection *selection);
+
+
+GList * pspp_sheet_selection_get_selected_columns (PsppSheetSelection *selection);
+gint pspp_sheet_selection_count_selected_columns (PsppSheetSelection *selection);
+void pspp_sheet_selection_select_all_columns (PsppSheetSelection *selection);
+void pspp_sheet_selection_unselect_all_columns (PsppSheetSelection *selection);
+void pspp_sheet_selection_select_column (PsppSheetSelection *selection,
+ PsppSheetViewColumn *column);
+void pspp_sheet_selection_select_column_range (PsppSheetSelection *selection,
+ PsppSheetViewColumn *first,
+ PsppSheetViewColumn *last);