{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"ty::Closure(def_id,"}]}
            ty::Closure(def_id, _) | ty::Coroutine(def_id, _) | ty::CoroutineClosure(def_id, _) => {
            // coroutines, closures, and coroutine-closures all have upvars that may be named.
                let mut name = None;