code: def test_combine_specs_overlapping_and_compatible(self):
      spec1 = {"string": types.String()}
      spec2 = {"int": types.Integer(), "string": types.String()}
      spec = utils.combine_specs(spec1, spec2)
      self.assertEqual(
          spec, {"string": types.String(), "int": types.Integer()}
      )
  
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 15 for calling the UtilsTest obj's underlying member method code with example usage: obj.test_combine_specs_overlapping_and_compatible() without return types