an><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">&gt;(</span><span class="identifier">size</span><span class="special">));</span>
        <span class="identifier">chunk</span><span class="special">.</span><span class="identifier">clear</span><span class="special">();</span>
    <span class="special">};</span>

    <span class="comment">// Set the callback. The function requires a non-const refere