{"ast_node_type":"variable","tokens":[{"end":97,"kind":"keyword","start":0,"text":"let"}]}
        let items = items_in_def_order.into_iter().map(|item| (item.opt_name(), item)).collect();
    pub fn new(items_in_def_order: impl IntoIterator<Item = ty::AssocItem>) -> Self {
        AssocItems { items }