syntax_data: {"ast_node_type":"variable","tokens":[{"end":49,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let mut hasher = StableHasher::new();
context_before:         self.with_stable_hashing_context(|mut hcx| {
context_after:             hcx.while_hashing_spans(false, |hcx| ty.hash_stable(hcx, &mut hasher));