event pertains. In the case of <code>userRoleChanges</code> for an 
  entire CollectionNode and <code>myRoleChange</code>, this is null.
  </p></div>
<a name="userID"></a>
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<tr>
<td class="detailHeaderName">userID</td><td class="detailHeaderType">property</td><td class="detailHeaderRule">&nbsp;</td>
</tr>
</table>
<div class="detailBody">
<code>public var userID:String</code><p>
  For <code>userRoleChange</code> events, the <code>userID</code> cont