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          <td class="memname">bool reached </td>
          <td>(</td>
          <td class="paramtype">Node&#160;</td>
          <td class="paramname"><em>v</em></td><td>)</td>
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<p>Returns <code>true</code> if <code>v</code> is reachable from the root. </p>
<dl class="section warning"><dt>Warning</dt><dd