a name="l00157"></a><span class="lineno">  157</span>&#160; </div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;  <span class="comment">// The equivalence class representative for each node.</span></div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;  std::vector&lt;NodeIndex&gt; class_;</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160; </div>
<div class="line"><a name="l00161"></a><span class="lineno">  161<