title: PendingChanges only for specific OData Entities
body: <p>Is there a way to check only a specific entity of a OData-Model for pending changes? 
  Pending changes does not have any input parameters, also I'm not sure if DeferredGroups would work for this. </p>
  
  <p>My only idea is using <code>ODataModel.getPendingChanges()</code> and make a string comparison on the results. But maybe there is a more elegant option.</p>