code: def testValidateBoundedSpecDistinctBounds(self):
      observation_spec = array_spec.BoundedArraySpec(
          (3,), np.int32, [-10, -5, -2], [10, 5, 2]
      )
      env = get_mock_env(self._action_spec, observation_spec, None)
      rng = np.random.RandomState()
      sample_fn = lambda: array_spec.sample_spec_nest(
          env.observation_spec(), rng
      )
  
      def step(unused_time_step):
          if rng.rand() < 0.10:
              return ts.termination(
                  sample_fn(), 0.0
              )  # pytype: disable=wrong-arg-types
          else:
              return ts.transition(
                  sample_fn(), 1.0
              )  # pytype: disable=wrong-arg-types
  
      env.step = step
      env.reset = lambda: ts.restart(sample_fn())
      utils.validate_py_environment(env, episodes=1)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing.absltest import mock
  import numpy
  from tf_agents.environments import random_py_environment
  from tf_agents.environments import utils
  from tf_agents.specs import array_spec
  from tf_agents.trajectories import time_step
  from tf_agents.utils import test_utils
label_desc: Use image node_id 8 for calling the UtilsTest obj's underlying member method code with example usage: obj.testValidateBoundedSpecDistinctBounds() and returns: ts, ts