template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">config</span><span class="special">&gt;</span>
<span class="keyword">class</span> <span class="identifier">connection</span>
<span class="special">:</span> <span class="keyword">public</span> <span class="identifier">config</span><span class="special">::</span><span class="identifier">transport_type</span><span class="special">::</span><span class="identifier">transport_con_type</span>
<span class