}

  /**
   * Fails compilation if the signature of min and max is changed to take {@code Comparator<T>}
   * instead of {@code Comparator<? super T>}.
   */
  public void testMinMaxWithSupertypeComparator() {
    Comparator<Number> numberComparator = comparing(Number::intValue);
    Integer comparand1 = 1;
    Integer comparand2 = 2;

    Integer min = min(comparand1, comparand2, numberComparator);