syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"#[cfg(feature"}]}
source_snippet:         #[cfg(feature = "nightly")]
context_before:     fn hash<H: Hasher>(&self, s: &mut H) {
context_after:         if self.stable_hash != Fingerprint::ZERO {