If the row is expanded, gets the model holding the children of self.
This model is the model created by the gtk.types.TreeListModelCreateModelFunc
and contains the original items, no matter what value gtk.tree_list_model.TreeListModel.gboolean is set to.
The model containing the children
If the row is expanded, gets the model holding the children of self.
This model is the model created by the gtk.types.TreeListModelCreateModelFunc
and contains the original items, no matter what value gtk.tree_list_model.TreeListModel.gboolean is set to.