{"ast_node_type":"variable","tokens":[{"end":37,"kind":"keyword","start":0,"text":"let"}]}
        let expr = match &expr.kind {
        // currently have to be wrapped in curly brackets, so it's necessary to special-case.
            hir::ExprKind::Block(block, _) if block.stmts.is_empty() && block.expr.is_some() => {