code: def __init__(self, num_mock_workers):
      super().__init__(local_worker=False, _setup=False)
      self.add_workers(num_workers=num_mock_workers, validate=False)
  
file_path: ray/rllib/tests/mock_worker.py
imports: import numpy
  import ray
  from ray.rllib.evaluation.worker_set import WorkerSet
  from ray.rllib.policy.sample_batch import SampleBatch
  from ray.rllib.utils.filter import MeanStdFilter
label_desc: Use image node_id 1 to create a new _MockWorkerSet object from inherited base classes: WorkerSet with example: obj = _MockWorkerSet(num_mock_workers)