 a Future
 representing that task.  Upon completion, this task may be
 taken or polled.</p></div>
  <div class="jd-tagdata">
      <h5 class="jd-tagtitle">Parameters</h5>
      <table class="jd-tagtable">
        <tr>
          <th>task</td>
          <td>the task to submit</td>
        </tr>
        <tr>
          <th>result</td>
          <td>the result to return upon successful completion</td>
        </tr>
      </table>
  </div>
  <div class="jd-tagdata">
      <h5 class="jd-tagtitle">Returns</h5>
    