code: def test_as_bbox_dataset(self):
      assert_is_bbox_dataset(
          self.dataset, len(voc_bbox_label_names), n_example=10
      )
  
file_path: chainercv/tests/datasets_tests/voc_tests/test_voc_bbox_dataset.py
imports: import unittest
  import numpy
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import condition
  from chainercv.datasets import voc_bbox_label_names
  from chainercv.datasets import VOCBboxDataset
  from chainercv.utils import assert_is_bbox_dataset
label_desc: Use image node_id 2 for calling the TestVOCBboxDataset obj's underlying member method code with example usage: obj.test_as_bbox_dataset() without return types