"special">&amp;</span> node<span class="special">)</span><span class="special">;</span></pre>
<p><span class="bold"><strong>Requires</strong></span>: 'node' is a node from the tree except the leftmost node.</p>
<p><span class="bold"><strong>Effects</strong></span>: Returns the previous node of the tree.</p>
<p><span class="bold"><strong>Complexity</strong></span>: Average constant time.</p>
<p><span class="bold"><strong>Throws</strong></span>: Nothing. </p>
</li>
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<pre class="literallay