docs: public void removeBookmarkedConference(EntityBareJid jid) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
          retrieveBookmarks();
          Iterator<BookmarkedConference> it = bookmarks.getBookmarkedConferences().iterator();
          while (it.hasNext()) {
              BookmarkedConference conference = it.next();
              if (conference.getJid().equals(jid)) {
                  if (conference.isShared()) {
                      throw new IllegalArgumentException("Conference is shared and can't be removed");
                  }
                  it.remove();
                  privateDataManager.setPrivateData(bookmarks);
                  return;
              }
          }
      }