code: def test_validate_config_against_spec(self, config: types.JsonDict):
      validated = utils.validate_config_against_spec(
          config, _VALIDATION_SPEC, "unittest"
      )
      self.assertIs(config, validated)
  
imports: from collections.abc import Callable, Sequence
  import copy
  from typing import Any, Optional, TypeVar, Union
  from absl.testing import absltest
  from absl.testing import parameterized
  from lit_nlp.api import types
  from lit_nlp.lib import utils
  import numpy
label_desc: Use image node_id 12 for calling the UtilsTest obj's underlying member method code with example usage: obj.test_validate_config_against_spec(config) without return types