lt</var> if no
entry is associated with <var>key</var>
<li>True, if an entry was found; <code>nil</code> if there is no such entry
</ul>
</p>
<p><span class="fndoclabel">Description</span> <br /><code>Setf</code> may be used with <nobr><b>llrb-tree-value</b></nobr> to replace the
value associated with the given <var>key</var>, or to add a new entry. When a
<nobr><b>llrb-tree-value</b></nobr> form is used as a setf place, any
<var>default</var> which is supplied is evaluated, but its value is ignored.
</p>
<