syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"full_mangling_name().hash_stable(&mut"}]}
source_snippet:         full_mangling_name().hash_stable(&mut hcx, &mut hasher);
context_before:         let mut hasher = StableHasher::new();
context_after:         hasher.finish::<Hash64>().as_u64()