code: def _measure_timestamp_diff(self):
      max_diff = 60
      tmpfile = get_temp_filename() + ".txt"
      with open(tmpfile, "w") as f:
          f.write("timestamp_diff_test")
      key = "tests/" + str(uuid.uuid4())
      self.upload_file(key, tmpfile)
      remote_timestamp = self.get_file_timestamp(key)
  
      if remote_timestamp is not None:
          now_remote_diff = time.time() - remote_timestamp
          self.storage_handler.delete_file(key)
          os.remove(tmpfile)
  
          assert (
              -max_diff < now_remote_diff and now_remote_diff < max_diff
          ), (
              "Timestamp difference is more than 60 seconds. "
              + "You'll need to adjust local clock for caching "
              + "to work correctly"
          )
  
          return -now_remote_diff if now_remote_diff < 0 else 0
  
imports: import os
  import uuid
  import time
  from typing import Dict
  from studio.storage.storage_type import StorageType
  from studio.util.util import get_temp_filename, check_for_kb_interrupt
label_desc: Use image node_id 14 for calling the StorageHandler obj's underlying member method code with example usage: obj._measure_timestamp_diff() and returns: unknown