>std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span> 
<span class="keyword">class</span> <a class="link" href="severity_channel_logger_mt.html" title="Class template severity_channel_logger_mt">severity_channel_logger_mt</a> <span class="special">:</span> <span class="keyword">public</span> basic_composite_logger&lt; char, severity_channel_logger_mt&lt; LevelT, ChannelT &gt;, multi_thread_model&lt; implementation_defined &gt;, features&lt; severit