gboolean iter_children ( GtkTreeModel* tree_model, GtkTreeIter* iter, GtkTreeIter* parent )
iter to point to the first child of
parent has no children,
FALSE is returned and
set to be invalid.
parent will remain a valid node after this
function has been called.
NULL returns the first node, equivalent to
gtk_tree_model_get_iter_first (tree_model, iter);
GtkTreeIter-struct to be set to the child.
The argument will be set by the function. The data is owned by the caller of the function.
The argument can be
The data is owned by the caller of the function.