{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
                            let span = self.tcx.hir_span(body_id.hir_id);
                        if hir::is_range_literal(expr) {
                            if let Ok(snip) = self.tcx.sess.source_map().span_to_snippet(span) {