code: def testAutoencoderAutoregressive(self):
      res = self.get_mnist_random_output("autoencoder_autoregressive")
      self.assertEqual(res.shape, self.mnist_output_shape)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  from tensor2tensor.data_generators import mnist
  from tensor2tensor.models.research import autoencoders
  from tensor2tensor.utils import registry
  from tensor2tensor.utils import trainer_lib
  import tensorflow.compat.v1
  from tensorflow.compat.v1 import estimator
label_desc: Use image node_id 4 for calling the AutoencoderTest obj's underlying member method code with example usage: obj.testAutoencoderAutoregressive() without return types