code: def setUp(self):
      self.dataset = SBDInstanceSegmentationDataset(split=self.split)
  
file_path: chainercv/tests/datasets_tests/sbd_tests/test_sbd_instance_segmentation_dataset.py
imports: import unittest
  from chainer import testing
  from chainer.testing import attr
  from chainercv.datasets import sbd_instance_segmentation_label_names
  from chainercv.datasets import SBDInstanceSegmentationDataset
  from chainercv.utils import assert_is_instance_segmentation_dataset
label_desc: Use image node_id 1 for calling the TestSBDInstanceSegmentationDataset obj's underlying member method code with example usage: obj.setUp() without return types