{"ast_node_type":"function","tokens":[{"end":90,"kind":"keyword","start":0,"text":"fn"}]}
    fn extra_lifetime_params(&mut self, id: NodeId) -> Vec<(Ident, NodeId, LifetimeRes)> {
    /// should appear at the enclosing `PolyTraitRef`.
        self.extra_lifetime_params_map.get(&id).cloned().unwrap_or_default()