code: def testRestartBatched(self):
      observation = np.array([[-1], [-1]])
      time_step = ts.restart(observation, batch_size=2)
  
      self.assertItemsEqual(
          [ts.StepType.FIRST] * 2, time_step.step_type
      )
      self.assertItemsEqual(observation, time_step.observation)
      self.assertItemsEqual([0.0, 0.0], time_step.reward)
      self.assertItemsEqual([1.0, 1.0], time_step.discount)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import sys
  import numpy
  import tensorflow
  from tf_agents.specs import array_spec
  from tf_agents.specs import tensor_spec
  from tf_agents.trajectories import time_step
  from tf_agents.utils import nest_utils
label_desc: Use image node_id 14 for calling the TimeStepTest obj's underlying member method code with example usage: obj.testRestartBatched() without return types