code: @NotNull
      @SuppressWarnings("unchecked")
      public static <T extends Comparable<? super T>> ComparatorCompat<T> naturalOrder() {
          return (ComparatorCompat<T>) NATURAL_ORDER;
      }
docs: Returns a comparator with natural order.
  
  @param <T> the type of the objects compared by the comparator
  @return a comparator