code: def __iter__(self):
      yield self._batch
  
imports: import math
  from typing import List
  from ray.rllib.policy.sample_batch import MultiAgentBatch, concat_samples
  from ray.rllib.policy.sample_batch import SampleBatch
  from ray.rllib.utils.annotations import DeveloperAPI
  from ray.rllib.utils.typing import EpisodeType
label_desc: Use image node_id 2 for calling the MiniBatchDummyIterator obj's underlying member method code with example usage: obj.__iter__() without return types