class GrabberComparator implements Comparator<T> {

  public GrabberComparator(GrabberIF<T, G> grabber, Comparator<G> comparator) {
    this.grabber1 = grabber;
    this.comparator = comparator;
  }

  public  GrabberComparator(GrabberIF<T, G> grabber, Comparator<G> comparator);
  public  GrabberComparator(GrabberIF<T, G> grabber1, GrabberIF<T, G> grabber2, Comparator<G> comparator);

}