;List</span></a></li>
      <li><a href="hierarchy.html"><span>Class&#160;Hierarchy</span></a></li>
      <li><a href="functions.html"><span>Class&#160;Members</span></a></li>
    </ul>
  </div>
  <div id="nav-path" class="navpath">
    <ul>
      <li class="navelem"><a class="el" href="a00036.html">stx</a>      </li>
      <li class="navelem"><a class="el" href="a00001.html">btree</a>      </li>
      <li class="navelem"><a class="el" href="a00017.html">leaf_node</a>      </li>
    </ul>
  </div>
</div>
<d