code: def set_state(self, state: Dict):
      self.counter = state["counter"]
  
file_path: ray/python/ray/tune/tests/test_callbacks.py
imports: import pytest
  from typing import Dict, Optional
  from ray.tune.callback import Callback, CallbackList
label_desc: Use image node_id 4 for calling the StatefulCallback obj's underlying member method code with example usage: obj.set_state(state) without return types