syntax_data: {"ast_node_type":"other","tokens":[{"end":13,"kind":"keyword","start":0,"text":"}"}]}
source_snippet:             }
context_before:                 Ty::new_adt(tcx, option_adt_ref, option_args)
context_after:             CoroutineKind::Desugared(CoroutineDesugaring::AsyncGen, _) => {