code: def test_assert_nested_mismatched_structure(self):
      expected_msg = (
          "test:\n\nThe two structures don't have the same sequence type. "
          + "Input structure has type <(class|type) 'list'>, while shallow "
          "structure has type <(class|type) 'dict'>."
      )
  
      with self.assertRaisesRegex(AssertionError, expected_msg):
          self.assertAllAssertsNested(
              self.assertEqual, {"a": 3}, [3], msg="test"
          )
  
imports: import collections
  from absl import flags
  from absl.testing import flagsaver
  from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v1
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import dtype_util
  from tensorflow_probability.python.internal import test_combinations
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.util.seed_stream import SeedStream
label_desc: Use image node_id 13 for calling the _TestCaseTest obj's underlying member method code with example usage: obj.test_assert_nested_mismatched_structure() without return types