            }
            Node::Class(_, ref name, ref super_, ref body) => {
                self.strip_node(name);
                self.strip_node(super_);
                self.strip_node(body);
            }
            Node::CSend(_, ref recv, _, ref args) |
            Node::Send(_, ref recv, _, ref args) => {
                self.strip_node(recv);
                self.strip_nodes(args);
            }
            Node::Def(_, _, ref args, ref body) => {
                self.strip_node(args);