code: def setUp(self):
      self.dataset = ADE20KTestImageDataset()
  
file_path: chainercv/tests/datasets_tests/ade20k_tests/test_ade20k.py
imports: import numpy
  import unittest
  from chainer import testing
  from chainer.testing import attr
  from chainercv.datasets import ade20k_semantic_segmentation_label_names
  from chainercv.datasets import ADE20KSemanticSegmentationDataset
  from chainercv.datasets import ADE20KTestImageDataset
  from chainercv.utils import assert_is_semantic_segmentation_dataset
  from chainercv.utils.testing.assertions.assert_is_image import assert_is_image
label_desc: Use image node_id 1 for calling the TestADE20KTestImageDataset obj's underlying member method code with example usage: obj.setUp() without return types