syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"HygieneData::with(|data|"}]}
source_snippet:         HygieneData::with(|data| data.expn_hash_to_expn_id.get(&hash).copied())
context_before:     pub fn from_hash(hash: ExpnHash) -> Option<ExpnId> {
context_after:     }