public static function expandFid($compressedFid)
  {
    // replace `:` with `-`
    $fid = str_replace('-', ':', $compressedFid);
    // add 2010 from timestamp
    $fid = preg_replace_callback(
      '/:([0-9a-z]{5,6}):/',
      function ($v) {
        return ':' . base_convert($v[1], 36, 10) . ':';
      },
      $fid
    );
    // add FID: prefix
    return 'FID:' . $fid;
  }