pan class="identifier">fd_</span><span class="special">;</span>
  <span class="identifier">Handler</span> <span class="identifier">handler_</span><span class="special">;</span>
  <span class="identifier">off_t</span> <span class="identifier">offset_</span><span class="special">;</span>
  <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">total_bytes_transferred_</span><span class="special">;</span>

  <span class="comment">// Fun