{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"group.stream.map(|it|"}]}
            group.stream.map(|it| it.token_trees).unwrap_or_else(|| Vec::with_capacity(1));
        let mut tts =
        tts.insert(0, tt::TokenTree::Subtree(tt::Subtree { delimiter, len: tts.len() as u32 }));