code: def contains(self, key):
      return key in self.data
  
imports: from multiprocessing import Pool
  from os.path import join, dirname
  import requests
  from bs4 import BeautifulSoup
  from os.path import exists
  import joblib
  from underthesea.utils import logger
label_desc: Use image node_id 4 for calling the Cache obj's underlying member method code with example usage: obj.contains(key) and returns: unknown