syntax_data: {"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let mut multispan = MultiSpan::from_span(pat_span);
context_before:             let mut iter = covering_pats.iter();
context_after:             for p in iter.by_ref().take(CAP_COVERED_BY_MANY) {