code: def test_repr(self):
      f = TorchVisionWrapper("Grayscale", num_output_channels=3)
      self.assertEqual(
          repr(f),
          "TorchVisionWrapper(op = Grayscale, num_output_channels = 3)",
      )
  
imports: import copy
  import unittest
  from typing import Dict, List, Optional
  import numpy
  from shapely.geometry import Polygon
  from mmocr.datasets.transforms import ConditionApply, ImgAugWrapper, TorchVisionWrapper
label_desc: Use image node_id 2 for calling the TestTorchVisionWrapper obj's underlying member method code with example usage: obj.test_repr() without return types