{"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
        let extra_lifetimes = self.resolver.extra_lifetime_params(parent_node_id);
        // Introduce extra lifetimes if late resolution tells us to.
        params.extend(extra_lifetimes.into_iter().filter_map(|(ident, node_id, res)| {