{"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"self.nodes[idx.0].push(LinkNode::Node(Rc::new(BindingKind::Optional(var.clone()))));"}]}
        self.nodes[idx.0].push(LinkNode::Node(Rc::new(BindingKind::Optional(var.clone()))));
    fn push_optional(&mut self, idx: &mut BindingsIdx, var: &Symbol) {
    }