{"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"let"}]}
    let version_string = String::from_utf8(version_string_utf8);
    metadata_portion.read_exact(&mut version_string_utf8)?;
    version_string.map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))