code: public static void sortDescending(double[] array, int fromIndex, int toIndex) {
      checkNotNull(array);
      checkPositionIndexes(fromIndex, toIndex, array.length);
      Arrays.sort(array, fromIndex, toIndex);
      reverse(array, fromIndex, toIndex);
    }
docs: Sorts the elements of {@code array} between {@code fromIndex} inclusive and {@code toIndex}
  exclusive in descending order.
  
  <p>Note that this method uses the total order imposed by {@link Double#compare}, which treats
  all NaN values as equal and 0.0 as greater than -0.0.
  
  @since 23.1