code: def test_resumed_trigger_sparse_call(self):
      trainer = testing.get_trainer_with_mock_updater(
          stop_trigger=None, iter_per_epoch=self.iter_per_epoch
      )
      accumulated = False
      with tempfile.NamedTemporaryFile(delete=False) as f:
          trigger = training.triggers.IntervalTrigger(*self.interval)
          for expected in self.expected[: self.resume]:
              trainer.updater.update()
              accumulated = accumulated or expected
              if random.randrange(2):
                  self.assertEqual(trigger(trainer), accumulated)
                  accumulated = False
          serializers.save_npz(f.name, trigger)
  
          trigger = training.triggers.IntervalTrigger(*self.interval)
          serializers.load_npz(f.name, trigger)
          for expected in self.expected[self.resume :]:
              trainer.updater.update()
              accumulated = accumulated or expected
              if random.randrange(2):
                  self.assertEqual(trigger(trainer), accumulated)
                  accumulated = False
  
file_path: chainer/tests/chainer_tests/training_tests/triggers_tests/test_interval_trigger.py
imports: from __future__ import division
  import random
  import tempfile
  import unittest
  import numpy
  from chainer import serializers
  from chainer import testing
  from chainer.testing import condition
  from chainer import training
label_desc: Use image node_id 4 for calling the TestIntervalTrigger obj's underlying member method code with example usage: obj.test_resumed_trigger_sparse_call() without return types