: 1%">V</td>
                  <td>a callable type (function, lambda, etc.) that accepts a <a href="classtf_1_1Task.html" class="m-doc">tf::<wbr />Task</a> handle</td>
                </tr>
              </tbody>
              <thead>
                <tr><th colspan="2">Parameters</th></tr>
              </thead>
              <tbody>
                <tr>
                  <td>visitor</td>
                  <td>visitor to apply to each subflow task</td>
                </tr>
              </tbody>
         