syntax_data: {"ast_node_type":"variable","tokens":[{"end":52,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let (a, b) = (a_orig.data(), b_orig.data());
context_before:     ) -> Result<(SpanData, SpanData, Option<LocalDefId>), Span> {
context_after:         if a.ctxt == b.ctxt {