an>
      <span class="identifier">Domain</span><span class="special">,</span>
      <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">remove_reference</span><span class="special">&lt;</span> <span class="identifier">Sequence</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
    <span class="special">&gt;</span>
<span class="special">{</span>
<span class="special">}</spa