-void pspp_sheet_view_expand_all (PsppSheetView *tree_view);
-void pspp_sheet_view_collapse_all (PsppSheetView *tree_view);
-void pspp_sheet_view_expand_to_path (PsppSheetView *tree_view,
- GtkTreePath *path);
-gboolean pspp_sheet_view_expand_row (PsppSheetView *tree_view,
- GtkTreePath *path,
- gboolean open_all);
-gboolean pspp_sheet_view_collapse_row (PsppSheetView *tree_view,
- GtkTreePath *path);
-void pspp_sheet_view_map_expanded_rows (PsppSheetView *tree_view,
- PsppSheetViewMappingFunc func,
- gpointer data);
-gboolean pspp_sheet_view_row_expanded (PsppSheetView *tree_view,
- GtkTreePath *path);