{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"CoroutineKind::Gen"}]}
            CoroutineKind::Gen { .. } => (sym::Item, hir::LangItem::Iterator),
            CoroutineKind::Async { .. } => (sym::Output, hir::LangItem::Future),
            CoroutineKind::AsyncGen { .. } => (sym::Item, hir::LangItem::AsyncIterator),