code></span></p></td>
<td><p>The iterator that denotes the beginning of the sequence of request objects.</p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">last</code></span></p></td>
<td><p>The iterator that denotes the end of the sequence of request objects. This may not be equal to <code class="computeroutput">first</code>.</p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">out</code></span></p></td>
<td><p>If provided, the <code class="computeroutput">stat