code: def set_location(cls, new_cache_dir):
      if cls._db is not None:
          cls._db.close()
          cls._db = None
      cls._cache_dir = new_cache_dir
  
imports: import peewee
  from threading import Lock
  import os
  import appdirs
  import atexit
  import datetime
  import pickle
  from .utils import get_yf_logger
label_desc: Use image node_id 4 for calling the _CookieDBManager obj's underlying member method code with example usage: obj.set_location(cls, new_cache_dir) without return types