n class="special">()</span>
<span class="special">{</span>
    <span class="identifier">logging</span><span class="special">::</span><span class="identifier">register_filter_factory</span><span class="special">(</span><span class="string">"Coordinates"</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">make_shared</span><span class="special">&lt;</span> <span class="identifier">point_filter_factory</span> <span class="special">&g