EventProperties">
      <td>getEventProperties(event)</td>
      <td>Object</td>
      <td>
        Returns an Object with relevant properties from an event:
        <ul>
          <li><code>group</code> (Number or null): the id of the clicked group.</li>
          <li><code>item</code> (Number or null): the id of the clicked item.</li>
          <li><code>pageX</code> (Number): absolute horizontal position of the click event.</li>
          <li><code>pageY</code> (Number): absolute vertical position of the