docs: public void removeBookmarkedURL(String bookmarkURL) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
          retrieveBookmarks();
          Iterator<BookmarkedURL> it = bookmarks.getBookmarkedURLS().iterator();
          while (it.hasNext()) {
              BookmarkedURL bookmark = it.next();
              if (bookmark.getURL().equalsIgnoreCase(bookmarkURL)) {
                  if (bookmark.isShared()) {
                      throw new IllegalArgumentException("Cannot delete a shared bookmark.");
                  }
                  it.remove();
                  privateDataManager.setPrivateData(bookmarks);
                  return;
              }
          }
      }