code: def get_state(self) -> Optional[Dict]:
      return {"counter": self.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 3 for calling the StatefulCallback obj's underlying member method code with example usage: obj.get_state() and returns: dict