syntax_data: {"ast_node_type":"other","tokens":[{"end":11,"kind":"keyword","start":0,"text":")"}]}
source_snippet:         ) {
context_before:             CoroutineKind::Desugared(CoroutineDesugaring::Async | CoroutineDesugaring::AsyncGen, _)
context_after:             let context_mut_ref = transform_async_context(tcx, body);