{"ast_node_type":"variable","tokens":[{"end":45,"kind":"keyword","start":0,"text":"let"}]}
        let mut hasher = StableHasher::new();
    fn to_stable_hash_key(&self, hcx: &StableHashingContext<'a>) -> Fingerprint {
        let mut hcx: StableHashingContext<'a> = hcx.clone();