{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"assert!(lock_file_name.ends_with(LOCK_FILE_EXT));"}]}
            assert!(lock_file_name.ends_with(LOCK_FILE_EXT));
        .map(|lock_file_name| {
            let dir_prefix_end = lock_file_name.len() - LOCK_FILE_EXT.len();