er role value
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<td class="detailHeaderName">isGroupDefined</td><td class="detailHeaderParens">()</td><td class="detailHeaderType">method</td><td class="detailHeaderRule">&nbsp;</td>
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<code>public function isGroupDefined(p_groupName:String):Boolean</code><p>
   Returns whether or not a specified group exists. 
   
   </p><span class="label">Par