code: def test_observer_resets(
      self,
      create_observer_fn,
      reset_with_write_cached_steps,
      append_count,
      expected_items,
      append_count_from_reset,
      expected_items_from_reset,
  ):
      env = _env_creator(5)()
      with create_observer_fn(self._mock_client) as observer:
          policy = _create_random_policy_from_env(env)
          driver = py_driver.PyDriver(
              env, policy, observers=[observer], max_steps=11
          )
          driver.run(env.reset())
  
          self.assertEqual(
              append_count, self._mock_writer.append.call_count
          )
          self.assertEqual(
              expected_items, self._mock_writer.create_item.call_count
          )
          observer.reset(
              write_cached_steps=reset_with_write_cached_steps
          )
          self.assertEqual(
              append_count + append_count_from_reset,
              self._mock_writer.append.call_count,
          )
          self.assertEqual(
              expected_items + expected_items_from_reset,
              self._mock_writer.create_item.call_count,
          )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import contextlib
  import functools
  import time
  from absl.testing import parameterized
  import mock
  import reverb
  from six.moves import range
  import tensorflow
  from tf_agents.drivers import py_driver
  from tf_agents.environments import parallel_py_environment
  from tf_agents.environments import test_envs
  from tf_agents.policies import random_py_policy
  from tf_agents.replay_buffers import reverb_replay_buffer
  from tf_agents.replay_buffers import reverb_utils
  from tf_agents.specs import tensor_spec
  from tf_agents.system import system_multiprocessing
  from tf_agents.trajectories import time_step
  from tf_agents.utils import test_utils
label_desc: Use image node_id 3 for calling the ReverbObserverTest obj's underlying member method code with example usage: obj.test_observer_resets(create_observer_fn, reset_with_write_cached_steps, append_count, expected_items, append_count_from_reset, expected_items_from_reset) without return types