void pspp_sheet_view_column_set_expand (PsppSheetViewColumn *tree_column,
gboolean expand);
gboolean pspp_sheet_view_column_get_expand (PsppSheetViewColumn *tree_column);
void pspp_sheet_view_column_set_expand (PsppSheetViewColumn *tree_column,
gboolean expand);
gboolean pspp_sheet_view_column_get_expand (PsppSheetViewColumn *tree_column);