>
    <tr>
      <th>silent</th>
      <td><p>Logical (default is FALSE). TRUE hides request sent.</p></td>
    </tr>
    <tr>
      <th>region</th>
      <td><p>String for the active region to use for journey plans.
Possible values are 'southeast' (default) or 'tfl'.</p></td>
    </tr>
    <tr>
      <th>modes</th>
      <td><p>Vector of character strings containing modes to use. Default is
to use all modes.</p></td>
    </tr>
    <tr>
      <th>not_modes</th>
      <td><p>Vector of character strings conta