{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"GenBlockKind::Async"}]}
                        GenBlockKind::Async => hir::CoroutineDesugaring::Async,
                    let desugaring_kind = match genblock_kind {
                        GenBlockKind::Gen => hir::CoroutineDesugaring::Gen,