Create a special-purpose sorter that applies the sorting of @sorter to the levels of a GtkTreeListModel.
Note that this sorter relies on [property@Gtk.TreeListModel:passthrough] being %FALSE as it can only sort [class@Gtk.TreeListRow]s.
a GtkSorter, or %NULL
a new GtkTreeListRowSorter
ConstructionException GTK+ fails to create the object.
See Implementation
Create a special-purpose sorter that applies the sorting of @sorter to the levels of a GtkTreeListModel.
Note that this sorter relies on [property@Gtk.TreeListModel:passthrough] being %FALSE as it can only sort [class@Gtk.TreeListRow]s.