code: def termination_watcher_function_gce():
      result = (
          request_compute_metadata("instance/maintenance-event")
          == "TERMINATE_ON_HOST_MAINTENANCE"
      )
      return result
  
file_path: tensorflow-upstream/tensorflow/python/distribute/failure_handling/failure_handling_util.py
imports: import enum
  import os
  import sys
  import requests
  from six.moves.urllib import request
  from tensorflow.python.eager import context
  from tensorflow.python.platform import tf_logging
label_desc: Use image node_id 4 for calling a global function with example usage: termination_watcher_function_gce() and returns: result