[Event(name="dataByQuerySpecRequest", type=...)]
 public class SomeDataViewMediator extends EventDispatcher {
    private function onDataRequestFromView(event:Event):void {
       // create a query spec to execute
       var querySpec:QuerySpec;
 
       var request:DataByQuerySpecRequest =
             new DataByQuerySpecRequest.newInstance(querySpec);
       dispatchEvent(request);
    }
 
    // Option 1 - use EventHandler for the response
    [EventHandler(name="dataByQuerySpecResponse")]
    private function onDataRetrieved(response:MultiObjectDataResponse):void {
       var result1:convertToDataObject = response.result[0] as convertToDataObject;
       _logger.info("server object: " + result1.sourceInfo_.provider.toString());
       _logger.info("property1: " + result1.value["property1"]);
       _logger.info("property2: " + result1.value["property2"]);
    }
 
    // Option 2 - use ResponseHandler for the response
    [ResponseHandler(name="dataByQuerySpecResponse")]
    public function onDataRetrieved(request:DataByQuerySpecRequest,
                                     result:ArrayCollection,
                                     error:Error):void {
       var result1:convertToDataObject = result[0] as convertToDataObject;
       _logger.info("server object: " + result1.sourceInfo_.provider.toString());
       _logger.info("property1: " + result1.value["property1"]);
       _logger.info("property2: " + result1.value["property2"]);
    }
 }