code: def setUp(self):
      self.released = set()
  
      def _iterator():
          id_ = 0
          while True:
              yield id_, DummyObject(self.released, id_)
              id_ += 1
  
      self.iterable = _iterator()
  
imports: import random
  import unittest
  from chainer import testing
  from chainercv.utils import unzip
label_desc: Use image node_id 1 for calling the TestUnzipRelease obj's underlying member method code with example usage: obj.setUp() without return types