</span><span class="identifier">text_ostream_backend</span> <span class="special">&gt;</span> <span class="identifier">backend</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">sinks</span><span class="special">::</span><span class="identifier">text_ostream_backend</span> <span class="special">&gt;();</span>
    <span class="identifier">backend