span><span class="identifier">text_ostream_backend</span> <span class="special">&gt;</span> <span class="identifier">sink_t</span><span class="special">;</span>

<span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special">&lt;</span> <span class="identifier">sink_t</span> <span class="special">&gt;</span> <span class="identifier">init_logging</span><span class="special">()</span>
<span class="special">{</span>
    <span class="identifie