er">b</span><span class="special">:</span>
                    <span class="identifier">Unused</span> <span class="special">--&gt;</span>
                    <span class="special">(</span><span class="identifier">a</span>
                    <span class="special">&lt;&lt;</span> <span class="identifier">b</span><span class="special">):</span> <span class="identifier">A</span></code>
                  </p>
                </td>
</tr>
</tbody>
</table></div>
<p>
          which reads as:
        </p>
<div cla