{"ast_node_type":"other","tokens":[{"end":13,"kind":"keyword","start":0,"text":"}"}]}
            }
                (def_id, UpvarArgs::CoroutineClosure(args), self.closure_kind(ty).is_none())
            ty::Coroutine(def_id, args) => (def_id, UpvarArgs::Coroutine(args), false),