om the
 <code>Set</code>, either directly or indirectly through an <code>Iterator</code> returned by the
 <code>Set</code>.</li>
 <li>Updates to the <code>value</code> of an entry in this <code>set</code> must write through to the corresponding
 column value in the underlying <code>ResultSet</code>.</li>
 </ul>
 </li>
 <li>The <code>keySet()</code> method must return a <code>Set</code> that throws
 <code>UnsupportedOperationException</code> on any attempt to add or remove keys, either directly or through an