code: def getGPUs(self):
      return self.gpu_list
  
imports: import copy
  from collections import OrderedDict
  import pytest
  import sys
  import unittest
  from unittest.mock import patch
  from ray.tune.utils.util import wait_for_gpu
  from ray.tune.utils.util import flatten_dict, unflatten_dict, unflatten_list_dict
label_desc: Use image node_id 2 for calling the GPUUtilMock obj's underlying member method code with example usage: obj.getGPUs() and returns: self