code: def setUp(self):
      def order_sampler(order, cur_pos):
          return numpy.repeat(numpy.arange(3), 2)
  
      self.options = {"order_sampler": 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 TestMultithreadIteratorOrderSamplerEpochSize obj's underlying member method code with example usage: obj.setUp() and returns: numpy