syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"HygieneData::with(|data|"}]}
source_snippet:         HygieneData::with(|data| data.outer_mark(self))
context_before:     fn outer_mark(self) -> (ExpnId, Transparency) {
context_after:     }