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<code>public function getGroupNames():Array</code><p>
   Returns all the group names. 
   
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<span class="label">Returns</span>
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<td width="20"></td><td><code>Array</code> &mdash; An array of group names
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<a name="getNodeConfiguration()"></a>
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<td class="detailHeaderName">getNodeConfiguration</td><td class="de