syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"HygieneData::with(|data|"}]}
source_snippet:         HygieneData::with(|data| {
context_before:     ) -> Option<Option<ExpnId>> {
context_after:             if data.adjust(self, expn_id).is_some() {