code: def _time_step(self):
      return ts.transition(
          tf.constant([[1, 2]], dtype=tf.float32),
          reward=tf.constant([1.0]),
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  import numpy
  from six.moves import range
  import tensorflow
  from tf_agents.policies import temporal_action_smoothing
  from tf_agents.policies import tf_policy
  from tf_agents.specs import tensor_spec
  from tf_agents.trajectories import policy_step
  from tf_agents.trajectories import time_step
  from tf_agents.utils import test_utils
label_desc: Use image node_id 2 for calling the TemporalActionSmoothingTest obj's underlying member method code with example usage: obj._time_step() and returns: ts