code: def setUp(self):
      self.bbox = np.array(
          (
              (0, 0, 3, 4),
              (0, 0, 5, 6),
              (0, 5, 3, 6),
              (1, 2, 3, 4),
              (3, 3, 4, 6),
          ),
          dtype=np.float32,
      )
      self.y_slice = slice(1, 5)
      self.x_slice = slice(0, 4)
  
file_path: chainercv/tests/transforms_tests/bbox_tests/test_crop_bbox.py
imports: import numpy
  import unittest
  from chainer import testing
  from chainercv.transforms import crop_bbox
label_desc: Use image node_id 1 for calling the TestCropBbox obj's underlying member method code with example usage: obj.setUp() without return types