
<li class="listitem">
            The container may only be default-constructed.
          </li>
<li class="listitem">
            No support for allocators, stateful or otherwise.
          </li>
<li class="listitem">
            There are no customization points at all.
          </li>
</ul></div>
<p>
        Now we analyze the structure of the larger message container. The library
        uses a handle/body idiom. There are two public message container interfaces,
        one for requests (<code class="