*   <li>Next, if only one {@code Bar} is null, that null value is treated as <i>lesser</i>
 *   <li>Finally, natural ordering is used (i.e. the result of {@code Bar.compareTo(Bar)} is
 *       returned)
 * </ol>
 *
 * <p>Alas, {@link #reverse} is a little different. As you read backwards through a chain and
 * encounter a call to {@code reverse}, continue working backwards until a result is determined, and
 * then reverse that result.
 *

  Suddenly she came upon a little three-legged table, all made of
solid glass; there was nothing on it except a tiny golden key,
and Alice's first thought was that it might belong to one of the
doors of the hall; but, alas! either the locks were too large, or
the key was too small, but at any rate it would not open any of
them.  However, on the second time round, she came upon a low
curtain she had not noticed before, and behind it was a little

  Suddenly she came upon a little three-legged table, all made of
solid glass; there was nothing on it except a tiny golden key,
and Alice's first thought was that it might belong to one of the
doors of the hall; but, alas! either the locks were too large, or
the key was too small, but at any rate it would not open any of
them.  However, on the second time round, she came upon a low
curtain she had not noticed before, and behind it was a little