{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"hir::CoroutineDesugaring::Async"}]}
                    hir::CoroutineDesugaring::Async | hir::CoroutineDesugaring::Gen,
                Some(hir::CoroutineKind::Desugared(
                    hir::CoroutineSource::Closure