code: def hash_key(self, model_key: str, item: Any, kwargs: Dict[str, Any]):
      cache_key = self.cache_keys.get(model_key)
      if not cache_key:
          self.cache_keys[model_key] = (
              model_key + modelkit.__version__
          ).encode()
          cache_key = self.cache_keys[model_key]
      pickled = pickle.dumps(
          (item, kwargs)
      )  # nosec: only used to build a hash
      return hashlib.sha256(cache_key + pickled).digest()
  
imports: import abc
  import hashlib
  import pickle
  from dataclasses import dataclass
  from typing import Any, Dict, Generic, Optional
  import cachetools
  import cachetools.keys
  import pydantic
  import modelkit
  from modelkit.core.types import ItemType
  from modelkit.utils.redis import connect_redis
label_desc: Use image node_id 2 for calling the RedisCache obj's underlying member method code with example usage: obj.hash_key(model_key, item, kwargs) and returns: hashlib