{"ast_node_type":"variable","tokens":[{"end":58,"kind":"keyword","start":0,"text":"let"}]}
        let rules = self.lower_block_check_mode(&b.rules);
        let (stmts, expr) = self.lower_stmts(&b.stmts);
        hir::Block { hir_id, stmts, expr, rules, span: self.lower_span(b.span), targeted_by_break }