syntax_data: {"ast_node_type":"function","tokens":[{"end":56,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn from_hash(hash: ExpnHash) -> Option<ExpnId> {
context_before:     #[inline]
context_after:         HygieneData::with(|data| data.expn_hash_to_expn_id.get(&hash).copied())