docs: public synchronized void unsynchronizeWith(UpdateSynchronizer oldsync) {
      if(synchronizer == null) {
        LoggingUtil.warning("Warning: was not synchronized.");
        return;
      }
      if(synchronizer != oldsync) {
        LoggingUtil.warning("Warning: was synchronized differently!");
        return;
      }
      // LoggingUtil.warning("Unsynchronizing: " + sync + " " + oldsync);
      synchronizer = null;
      runQueue();
    }