code: def testCreateAgent(self):
      agent = bern_ts_agent.BernoulliThompsonSamplingAgent(
          self._time_step_spec, self._action_spec
      )
      self.assertIsNotNone(agent.policy)
  
imports: import numpy
  import tensorflow
  from tf_agents.bandits.agents import bernoulli_thompson_sampling_agent
  from tf_agents.bandits.drivers import driver_utils
  from tf_agents.policies import utils
  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 common
label_desc: Use image node_id 2 for calling the AgentTest obj's underlying member method code with example usage: obj.testCreateAgent() without return types