code: def testOpenClose(self):
      labs = [
          deepmind_lab.Lab("tests/empty_room_test", [])
          for _ in range(5)
      ]
      for lab in labs:
          self.assertTrue(lab.close())
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from absl.testing import absltest
  import numpy
  import six
  import deepmind_lab
label_desc: Use image node_id 5 for calling the DeepMindLabTest obj's underlying member method code with example usage: obj.testOpenClose() without return types