{"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"}"}]}
    } else if let Some(label) = ast::Label::cast(node.clone()) {
        (format!("mod {}", module.name()?), module.name().map(name))
        // in this case, `ast::Label` could be seen as a part of `ast::BlockExpr`