code: def _unit_test_params(cls):
      for params in super()._unit_test_params():
          yield {**params, "policy": bandit.EpsilonGreedy(0.2)}
  
file_path: river/river/model_selection/bandit.py
imports: from __future__ import annotations
  from river import bandit, metrics, model_selection
label_desc: Use image node_id 3 for calling the BanditModelSection obj's underlying member method code with example usage: obj._unit_test_params(cls) without return types