code: def test_flatten_and_unflatten_ops_no_batch_dims(self):
      batch_squash = utils.BatchSquash(0)
  
      for tensor in self._tensors:
          flat = batch_squash.flatten(tensor)
          unflat = batch_squash.unflatten(flat)
  
          self.assertAllEqual((1, 5, 4, 3, 2, 1), flat.shape)
          self.assertAllEqual((5, 4, 3, 2, 1), unflat.shape)
  
file_path: agents/tf_agents/networks/utils_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import tensorflow
  from tf_agents.keras_layers import permanent_variable_rate_dropout
  from tf_agents.networks import utils
label_desc: Use image node_id 3 for calling the NetworkUtilsTest obj's underlying member method code with example usage: obj.test_flatten_and_unflatten_ops_no_batch_dims() without return types