{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"//"}]}
        // in this case, `ast::Label` could be seen as a part of `ast::BlockExpr`
    } else if let Some(label) = ast::Label::cast(node.clone()) {
        // the actual number of lines in this case should be the line count of the parent BlockExpr,