AmazonWebServiceRequest originalRequest = request.getOriginalRequest();
ExecutionContext executionContext = createExecutionContext(request);
// executionContext.setCustomBackoffStrategy(com.amazonaws.internal.DynamoDBBackoffStrategy.DEFAULT);
JsonErrorResponseHandler errorResponseHandler = new JsonErrorResponseHandler(exceptionUnmarshallers);
Response<X> result = client.execute(request, responseHandler, errorResponseHandler, executionContext);
return result.getAwsResponse();
}