code: def testFromBatchTimeTrajectory(self):
      converter = data_converter.AsTransition(
          self._data_context, squeeze_time_dim=True
      )
      traj = tensor_spec.sample_spec_nest(
          self._data_context.trajectory_spec, outer_dims=[4, 2]
      )  # [B, T=2]
      converted = converter(traj)
      expected = trajectory.to_transition(traj)
      # Remove the now-singleton time dim.
      expected = tf.nest.map_structure(
          lambda x: tf.squeeze(x, 1), expected
      )
      (expected, converted) = self.evaluate((expected, converted))
      tf.nest.map_structure(self.assertAllEqual, converted, expected)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import tensorflow.compat.v2
  from tf_agents.agents import data_converter
  from tf_agents.specs import tensor_spec
  from tf_agents.trajectories import time_step
  from tf_agents.trajectories import trajectory
  from tf_agents.utils import test_utils
label_desc: Use image node_id 4 for calling the AsTransitionTest obj's underlying member method code with example usage: obj.testFromBatchTimeTrajectory() without return types