code: def test_current_report(self):
      reporter = chainer.Reporter()
      with reporter:
          mean = self.evaluator()
      # The result is reported to the current reporter.
      self.assertEqual(reporter.observation, mean)
  
imports: import numpy
  import unittest
  import chainer
  from chainer.datasets import TupleDataset
  from chainer.iterators import SerialIterator
  from chainer import testing
  from chainercv.extensions import InstanceSegmentationVOCEvaluator
  from chainercv.utils.testing import attr
  from chainermn import create_communicator
label_desc: Use image node_id 5 for calling the TestInstanceSegmentationVOCEvaluator obj's underlying member method code with example usage: obj.test_current_report() without return types