code: def test_incorrect_fetch(self):
      class LevelCache(object):
          def fetch(self):  # Missing arguments.
              return False
  
          def write(self, key, pk3_path):
              pass
  
      env = self._create_environment(LevelCache())
      with six.assertRaisesRegex(
          self, TypeError, "(exactly 1|takes 1 positional) argument"
      ):
          env.reset(episode=1, seed=123)
          env.step(self._dummy_action)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import shutil
  import six
  import tempfile
  from absl.testing import absltest
  import numpy
  import deepmind_lab
label_desc: Use image node_id 6 for calling the LevelCacheTest obj's underlying member method code with example usage: obj.test_incorrect_fetch() and returns: False