 class="computeroutput"><a class="link" href="../boost/intrusive/avl_multiset.html" title="Class template avl_multiset">avl_multiset</a></code> and
      <code class="computeroutput"><a class="link" href="../boost/intrusive/avltree.html" title="Class template avltree">avltree</a></code>. The first two
      are similar to <code class="computeroutput"><a class="link" href="../boost/intrusive/set.html" title="Class template set">set</a></code> or <code class="computeroutput"><a class="link" href="../boost/int