is a model component which manages a property of any type that 
  only one user can edit at a time.</td>
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<td class="summaryTablePaddingCol">&nbsp;</td><td class="summaryTableSecondCol"><a href="CollectionNode.html">CollectionNode</a></td><td class="summaryTableLastCol">
  CollectionNode is the foundation class for building shared models requiring publish
  and subscribe messaging.</td>
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<td class="summaryTablePaddingCol">&nbsp;</td><td class="summaryTableSeco