code: def _utcnow():
      """A wrapper function around datetime.datetime.utcnow.
  
      This function is created for unit testing purpose. It's not easy to do
      StubOutWithMock with datetime.datetime package.
  
      Returns:
        datetime.datetime
      """
      return datetime.datetime.utcnow()
  
imports: from concurrent import futures
  import datetime
  import json
  import logging
  import os
  import time
  import urllib
  from absl import flags
label_desc: Use image node_id 1 for calling a global function with example usage: _utcnow() and returns: datetime