get_sort_column_id

Description:

public abstract bool get_sort_column_id (out int sort_column_id, out SortType order)

Fills in sort_column_id and order with the current sort column and the order.

It returns true unless the sort_column_id is gtk_tree_sortable_default_sort_column_id or gtk_tree_sortable_unsorted_sort_column_id.

this	A `GtkTreeSortable`
sort_column_id	The sort column id to be filled in
order	The `GtkSortType` to be filled in

true if the sort column is not one of the special sort column ids.