@Override
  public LookupEx getActiveLookup() {
    if (myActiveLookup != null && myActiveLookup.isLookupDisposed()) {
      LookupImpl lookup = myActiveLookup;
      myActiveLookup = null;
      lookup.checkValid();
    }

    return myActiveLookup;
  }
@Override
  public LookupEx getActiveLookup()