  <td>String</td>
      <td>no</td>
      <td>
        A css text string to apply custom styling for an individual item, for
        example <code>"color: red; background-color: pink;"</code>.
      </td>
    </tr>
    <tr>
      <td>subgroup</td>
      <td>String or Number</td>
      <td>none</td>
      <td>The id of a subgroup.
        Groups all items within a group per subgroup, and positions them on the
        same height instead of staking them on top of each other. can be ordered
        by specifyi