{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"|"}]}
            | CoroutineKind::Gen { return_impl_trait_id, span, .. }
            CoroutineKind::Async { return_impl_trait_id, span, .. }
            | CoroutineKind::AsyncGen { return_impl_trait_id, span, .. } => {