code: def test_repr(self):
      pipeline = [dict(type="PackDetInputs", meta_keys=())]
      transform = MultiBranch(
          branch_field=self.branch_field, sup=pipeline, unsup=pipeline
      )
      self.assertEqual(
          repr(transform),
          ("MultiBranch(branch_pipelines=['sup', 'unsup'])"),
      )
  
file_path: mmdetection/tests/test_datasets/test_transforms/test_wrappers.py
imports: import copy
  import os.path
  import unittest
  from mmcv.transforms import Compose
  from mmdet.datasets.transforms import MultiBranch, RandomOrder
  from mmdet.utils import register_all_modules
  from .utils import construct_toy_data
label_desc: Use image node_id 3 for calling the TestMultiBranch obj's underlying member method code with example usage: obj.test_repr() without return types