get_n_sort_columns
Description:
Returns the number of columns by which the sorter sorts.
If the sorter of the primary sort column does not determine a total order, then the secondary sorters are consulted to break the ties.
Use the [signal@Gtk.Sorter:GtkColumnViewSorter:changed] signal to get notified when the number of sort columns changes.
Parameters:
| this |
a `GtkColumnViewSorter` |
Returns:
|
the number of sort columns |