   Request the executor to invoke the given function object.
                </p>
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                <p>
                  <a class="link" href="executor/target.html" title="executor::target"><span class="bold"><strong>target</strong></span></a>
                </p>
              </td>
<td>
                <p>
                  Obtain a pointer to the target executor object.
                </p>
              </td>
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<td>
                <p>
                  <a cla