@Override
  public int compare(PackageDependenciesNode p1, PackageDependenciesNode p2) {
    if (p1.getWeight() != p2.getWeight()) return p1.getWeight() - p2.getWeight();
    if (mySortByType) {
      if (p1 instanceof Comparable) {
        return ((Comparable)p1).compareTo(p2);
      }
    }
    final String o1 = p1.toString();
    final String o2 = p2.toString();
    if (o1 == null) return o2 == null ? 0 : -1;
    if (o2 == null) return 1;
    return o1.compareToIgnoreCase(o2);
  }
@Override
  public int compare(PackageDependenciesNode p1, PackageDependenciesNode p2)