code: def _create_dummy_steps(self):
      return reverb_adders.Step(
          observation=self._DUMMY_OBS,
          action=self._DUMMY_ACTION,
          reward=self._DUMMY_REWARD,
          discount=self._DUMMY_DISCOUNT,
          start_of_episode=True,
          extras={"return": self._DUMMY_RETURN},
      )
  
file_path: acme/acme/utils/reverb_utils_test.py
imports: from acme import types
  from acme.adders import reverb
  from acme.utils import reverb_utils
  import numpy
  import reverb
  import tree
  from absl.testing import absltest
label_desc: Use image node_id 2 for calling the ReverbUtilsTest obj's underlying member method code with example usage: obj._create_dummy_steps() and returns: reverb_adders