code: def test_proposal_target_creator_cpu(self):
      self.check_proposal_target_creator(
          self.roi, self.mask, self.label, self.proposal_target_creator
      )
  
file_path: chainercv/tests/experimental_tests/links_tests/model_tests/fcis_tests/utils_tests/test_proposal_target_creator.py
imports: import unittest
  import numpy
  from chainer.backends import cuda
  from chainer import testing
  from chainer.testing import attr
  from chainercv.experimental.links.model.fcis import ProposalTargetCreator
  from chainercv.utils import generate_random_bbox
  from chainercv.utils import mask_to_bbox
label_desc: Use image node_id 3 for calling the TestProposalTargetCreator obj's underlying member method code with example usage: obj.test_proposal_target_creator_cpu() without return types