docs: function getOwnerAndGroup(file) {
    const data = fs.lstatSync(file);
    const groupname = getGroupname(data.gid, {throwIfNotFound: false}) || null;
    const username = getUsername(data.uid, {throwIfNotFound: false}) || null;
    return {uid: data.uid, gid: data.gid, username: username, groupname: groupname};
  }