code: def test_segm_to_mask(self):
      mask = segm_to_mask(self.segm, self.bbox, self.size)
      np.testing.assert_equal(mask, self.mask)
  
file_path: chainercv/tests/links_tests/model_tests/fpn_tests/test_mask_utils.py
imports: from __future__ import division
  import numpy
  import unittest
  from chainer import testing
  from chainercv.links.model.fpn.mask_utils import mask_to_segm
  from chainercv.links.model.fpn.mask_utils import segm_to_mask
label_desc: Use image node_id 2 for calling the TestMaskUtils obj's underlying member method code with example usage: obj.test_segm_to_mask() without return types