{"ast_node_type":"variable","tokens":[{"end":85,"kind":"keyword","start":0,"text":"if"}]}
                    if let LifetimeRef::Named(name) = &ec.store.lifetimes[lifetime] {
                    let lifetime = ec.lower_lifetime_ref_opt(lifetime_param.lifetime());
                        let param = LifetimeParamData { name: name.clone() };