{"ast_node_type":"variable","tokens":[{"end":75,"kind":"keyword","start":0,"text":"let"}]}
        let root = $crate::SyntaxNode::new_root(root.into_node().unwrap());
        let root = root.into_iter().next().unwrap();
        <$crate::ast::$root as $crate::ast::AstNode>::cast(root).unwrap()