ecutor1.html" title="Executor requirements">Executor
                  requirements</a>.
                </p>
              </td>
<td>
                <p>
                  Returns the associated I/O executor.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput">a.async_write_some(cb,t)</code>
                </p>
              </td>
<td>
                <p>
                  The return type is determined according to the requirements fo