code: @Override
      public GetDataRetrievalPolicyResult getDataRetrievalPolicy(GetDataRetrievalPolicyRequest request) {
          request = beforeClientExecution(request);
          return executeGetDataRetrievalPolicy(request);
      }
docs: <p>
  This operation returns the current data retrieval policy for the account and region specified in the GET request.
  For more information about data retrieval policies, see <a
  href="http://docs.aws.amazon.com/amazonglacier/latest/dev/data-retrieval-policy.html">Amazon Glacier Data
  Retrieval Policies</a>.
  </p>
  
  @param getDataRetrievalPolicyRequest
  Input for GetDataRetrievalPolicy.
  @return Result of the GetDataRetrievalPolicy operation returned by the service.
  @throws InvalidParameterValueException
  Returned if a parameter of the request is incorrectly specified.
  @throws MissingParameterValueException
  Returned if a required header or parameter is missing from the request.
  @throws ServiceUnavailableException
  Returned if the service cannot complete the request.
  @sample AmazonGlacier.GetDataRetrievalPolicy