code: def get_cloud_tpu_supported_tf_versions():
      return ["2.1"]
  
file_path: cloud/src/python/tensorflow_cloud/core/gcp.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import re
  import google.auth
label_desc: Use image node_id 6 for calling a global function with example usage: get_cloud_tpu_supported_tf_versions() and returns: list