code: @BetaApi(
        "The surface for long-running operations is not stable yet and may change in the future.")
    public final OperationFuture<ExportDataOperationResponse, ExportDataOperationMetadata>
        exportDataAsync(ExportDataRequest request) {
      return exportDataOperationCallable().futureCall(request);
    }
docs: Exports data and annotations from dataset.
  
  <p>Sample code:
  
  <pre><code>
  try (DataLabelingServiceClient dataLabelingServiceClient = DataLabelingServiceClient.create()) {
  String formattedName = DataLabelingServiceClient.formatDatasetName("[PROJECT]", "[DATASET]");
  String annotatedDataset = "";
  OutputConfig outputConfig = OutputConfig.newBuilder().build();
  ExportDataRequest request = ExportDataRequest.newBuilder()
  .setName(formattedName)
  .setAnnotatedDataset(annotatedDataset)
  .setOutputConfig(outputConfig)
  .build();
  ExportDataOperationResponse response = dataLabelingServiceClient.exportDataAsync(request).get();
  }
  </code></pre>
  
  @param request The request object containing all of the parameters for the API call.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails