code: def dt(mocker):
      mocker.patch(
          "time.time",
          return_value=time.mktime(datetime(2020, 2, 2).timetuple()),
      )
      return "2020-02-02 00:00:00,000"
  
imports: import logging
  import time
  import traceback
  from datetime import datetime
  import colorama
  import pytest
  import dvc.logger
  from dvc.exceptions import DvcException
label_desc: Use image node_id 1 for calling a global function with example usage: dt(mocker) and returns: str