{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"AggregateKind::Coroutine(_,"}]}
                AggregateKind::Coroutine(_, _) => None,
                AggregateKind::Closure(_, _) => None,
                AggregateKind::CoroutineClosure(_, _) => None,