* equal to the element that preceded it, according to this ordering. Note that this is always
   * true when the iterable has fewer than two elements.
   *
   * <p><b>Java 8+ users:</b> Use the equivalent {@link Comparators#isInOrder(Iterable, Comparator)}
   * instead, since the rest of {@code Ordering} is mostly obsolete (as explained in the class
   * documentation).
   */
  public boolean isOrdered(Iterable<? extends T> iterable) {