n access to <code>employee::name</code>. A similar
functionality is provided for interoperability with reference wrappers from
<a href="../../../../doc/html/ref.html">Boost.Ref</a>:
</p>

<blockquote><pre>
<span class=keyword>typedef</span> <span class=identifier>multi_index_container</span><span class=special>&lt;</span>
  <span class=identifier>boost</span><span class=special>::</span><span class=identifier>reference_wrapper</span><span class=special>&lt;</span><span class=keyword>const</span> <span class