is 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">status</code> objects corresponding to completed requests will be emitted through this output iterator.</p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>If the <code class="computeroutput">out</code> parameter was provided, a p