code: def test_repr(self):
      self.assertEqual(
          repr(self.transform), ("PackKIEInputs(meta_keys=())")
      )
  
file_path: mmocr/tests/test_datasets/test_transforms/test_formatting.py
imports: import copy
  from unittest import TestCase
  import numpy
  import torch
  from mmocr.datasets.transforms import PackKIEInputs, PackTextDetInputs, PackTextRecogInputs
label_desc: Use image node_id 3 for calling the TestPackKIEInputs obj's underlying member method code with example usage: obj.test_repr() without return types