code: def test_maze_layout(self):
      env = deepmind_lab.Lab(
          "tests/debug_observation_test",
          [MAZE_LAYOUT_OBSERVATION],
          config={},
      )
  
      env.reset()
      self.assertEqual(
          env.observations()[MAZE_LAYOUT_OBSERVATION], TEST_MAP
      )
  
file_path: lab/python/tests/debug_observation_test.py
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 2 for calling the DebugObservationTest obj's underlying member method code with example usage: obj.test_maze_layout() without return types