="code" href="namespaceoperations__research.html#a272bcc4d6ee0e87a7fc430a5cb13c582">NodeIndex</a> node2) {</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    <span class="comment">// It&#39;s faster (~10%) to swap the two values and have a single piece of</span></div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;    <span class="comment">// code for merging the classes.</span></div>
<div class="line"><a name="l00141"></a><span class="line