{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"hir::CoroutineDesugaring::Async,"}]}
                                hir::CoroutineDesugaring::Async,
                            hir::ClosureKind::Coroutine(hir::CoroutineKind::Desugared(
                                hir::CoroutineSource::Closure,