pan> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">use_std_allocator</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> 
  <span class="identifier">channel_severity_filter</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> cha