setSortColumnId
Sets the current sort column to be @sort_column_id. The @sortable will resort itself to reflect this change, after emitting a GtkTreeSortable::sort-column-changed signal. @sort_column_id may either be a regular column id, or one of the following special values:
%GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID: the default sort function will be used, if it is set
%GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID: no sorting will occur
Parameters
sortColumnId
the sort column id to set
order
The sort order of the column