code: def _try_import_strategy():
      """Late import for Tesnorflow"""
      import tensorflow as tf
  
      return tf.distribute.experimental.MultiWorkerMirroredStrategy
  
file_path: BigDL/python/orca/src/bigdl/orca/learn/tf/tf_runner.py
imports: from contextlib import closing
  import json
  import logging
  import os
  import socket
  import ray
  from bigdl.dllib.utils.log4Error import invalidInputError
  from typing import TYPE_CHECKING, Any
label_desc: Use image node_id 2 for calling a global function with example usage: _try_import_strategy() and returns: tf