Gets whether the model is passing through original row items.
If this function returns false, the `GListModel` functions for this return custom `GtkTreeListRow` objects. You need to call [method@Gtk.TreeListRow.get_item] on these objects to get the original item.
If true, the values of the child models are passed through in their original state. You then need to call [method@Gtk.TreeListModel.get_row] to get the custom `GtkTreeListRow`s.
this |
a `GtkTreeListModel` |
true if the model is passing through original row items |