on</code> is ignored. Default 1.</p></td>
    </tr>
    <tr>
      <th>stroke_opacity</th>
      <td><p>Either a string specifying the column of <code>data</code>
containing the opacity of each shape, or a single value in [0,255], or [0, 1),
to be applied to all the shapes. Default 255. If a hex-string is used as the
colour, this argument is ignored and you should include the alpha on the hex string</p></td>
    </tr>
    <tr>
      <th>tooltip</th>
      <td><p>variable of <code>data</code> containing text