{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"AggregateKind::CoroutineClosure(def,"}]}
                AggregateKind::CoroutineClosure(def, ref args) => {
                AggregateKind::Coroutine(def, ref args) => Ok(Ty::new_coroutine(def, args.clone())),
                    Ok(Ty::new_coroutine_closure(def, args.clone()))