// Try to calculate a checksum that allows to modify Chrome's bookmarks
sS generateChromeBookmarksChecksum(S json) {
  Map bookmarks = jsonDecodeMap(json);
  MessageDigest md5 = md5encoder();
  
  embedded void checksum_node(O node) {
    if (node cast Map) {
      md5_updateUtf8(md5, (S) node.get("id"));
      md5.update(toUTF16LE((S) node.get("name")));
      if (eq(node.get("type"), "url")) {
        md5_updateUtf8(md5, "url");
        md5_updateUtf8(md5, (S) node.get("url"));
      } else {
        md5_updateUtf8(md5, "folder");
        fOr (O c : (L) node.get("children"))
          checksum_node(c);
      }
    }
  }

  for (S root : splitAtSpace("bookmark_bar other synced"))
    checksum_node(mapGetMapGet(bookmarks, "roots", root));
    
  ret md5_finish(md5);
}