="identifier">_get_data_available</span><span class="special">()).</span><span class="identifier">then</span><span class="special">([</span><span class="identifier">impl</span><span class="special">,</span> <span class="identifier">ignore_content_type</span><span class="special">](</span><span class="identifier">utility</span><span class="special">::</span><span class="identifier">size64_t</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="id