lass="identifier">FactoryT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">value</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> 
  <span class="identifier">register_sink_factory</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">const</span> <span class="special">&amp;</span> sink_name<span