syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":")"}]}
source_snippet:     ) -> Option<(StableSourceFileId, usize, BytePos, usize, BytePos)>;
context_before:         span: &SpanData,
context_after:     fn hashing_controls(&self) -> HashingControls;