syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"hygiene_data.local_expn_data.push(Some(data));"}]}
source_snippet:         hygiene_data.local_expn_data.push(Some(data));
context_before:         let expn_id = hygiene_data.local_expn_data.next_index();
context_after:         let _eid = hygiene_data.local_expn_hashes.push(hash);