><span class="fndoclabel">Purpose</span> <br />Return the value associated with a given key.
</p>
<p><span class="fndoclabel">Setf syntax</span><table class="tighttop" width="100%">
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<nobr>(setf (llrb-tree-value</nobr>
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<td valign="baseline">&nbsp; </td>
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<var>key llrb-tree</var>
<nobr><code>&#38;optional</code> <var>default</var></nobr>) <var>value</var>) 
<nobr><span 
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