code: def setUp(self):
      self.options = {
          "n_threads": self.n_threads,
          "order_sampler": self.order_sampler,
      }
  
imports: from __future__ import division
  import copy
  import unittest
  import numpy
  import six
  from chainer import iterators
  from chainer import serializers
  from chainer import testing
label_desc: Use image node_id 1 for calling the TestMultithreadIteratorSerialize obj's underlying member method code with example usage: obj.setUp() without return types