gtk:tree-view-column-sort-column-id (object)

object -- a gtk:tree-view-column object
id -- an integer for the sort column ID of the model to sort on

The accessor for the sort-column-id slot of the gtk:tree-view-column class gets or sets the logical sort column ID that the model sorts on when this tree view column is selected for sorting. Doing so makes the tree view column header clickable. The gtk:tree-view-column implementation is deprecated since 4.10. Please do not use it in newly written code.