gplot2 plot objects.</p></td>
    </tr>
    <tr>
      <th>split_aspect</th>
      <td><p>list indicating aspect ratios of axes for a split layout.  Only applies to ggplot2 plot objects.</p></td>
    </tr>
    <tr>
      <th>has_legend</th>
      <td><p>should a legend be reported for split_layout</p></td>
    </tr>
    <tr>
      <th>pb</th>
      <td><p>optional progress bar object to pass in and use to report progress</p></td>
    </tr>
    </table>


  </div>
  <div class="col-md-3 hidden-xs hidden-sm" 