docs: function isBookmarkInFolder(uri, folderId)
  {
    var ids = bookmarksService.getBookmarkIdsForURI(uri, {});
    for (let i = 0; i < ids.length; i++) {
      if (bookmarksService.getFolderIdForItem(ids[i]) == folderId)
        return true;
    }
  
    return false;
  }