Emits the #GtkTreeModel::row-has-child-toggled signal on tree_model. This should be called by models after the child state of a node changes.
a #GtkTreePath-struct pointing to the changed row
a valid #GtkTreeIter-struct pointing to the changed row
Emits the #GtkTreeModel::row-has-child-toggled signal on tree_model. This should be called by models after the child state of a node changes.