syntax_data: {"ast_node_type":"other","tokens":[{"end":10,"kind":"keyword","start":0,"text":"};"}]}
source_snippet:         };
context_before:             ..ExpnData::default(ExpnKind::Desugaring(reason), self, edition, None, None)
context_after:         let expn_id = LocalExpnId::fresh(expn_data, ctx);