@Override
  public int compare(@NotNull Object o1, @NotNull Object o2) {
    if (ChooseByNameBase.EXTRA_ELEM.equals(o1)) return 1;
    if (ChooseByNameBase.EXTRA_ELEM.equals(o2)) return -1;
    return ((MatchedValue)o1).compareWeights((MatchedValue)o2);
  }
@Override
  public int compare(@NotNull Object o1, @NotNull Object o2)