code: def get_df(self, name):
      path = self.file_path(name)
      with FileLock(self.path):
          if not os.path.exists(path):
              return None
          value = pd.read_pickle(path)
      return value
  
imports: import os
  import time
  from abc import ABC
  from pathlib import Path
  import hashlib
  import typing
  import pandas
  import walrus
  from mindsdb.utilities.config import Config
  from mindsdb.utilities.json_encoder import CustomJSONEncoder
  from mindsdb.interfaces.storage.fs import FileLock
  from mindsdb.utilities.context import context
label_desc: Use image node_id 6 for calling the FileCache obj's underlying member method code with example usage: obj.get_df(name) and returns: value, None