/span>&#160;  <span class="comment">// The size of each equivalence class of each node. Used to compress the paths</span></div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;  <span class="comment">// and therefore achieve better time complexity.</span></div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;  std::vector&lt;NodeIndex&gt; class_size_;</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160; </div>
<div c