code: def testRegisteredTypeSpec(self):
      expected_warning = (
          "Encoding a StructuredValue with type "
          "NestedStructureTest.RegisteredTypeSpec; loading "
          "this StructuredValue will require that this type "
          "be imported and registered"
      )
      structure = {"x": RegisteredTypeSpec()}
  
      self.assertTrue(nested_structure_coder.can_encode(structure))
      with warnings.catch_warnings(record=True) as w:
          encoded = nested_structure_coder.encode_structure(structure)
          self.assertLen(w, 1)
          self.assertIn(expected_warning, str(w[0].message))
      decoded = nested_structure_coder.decode_proto(encoded)
      self.assertEqual(structure, decoded)
  
imports: import collections
  import typing
  import warnings
  import numpy
  from google.protobuf import text_format
  from tensorflow.core.protobuf import struct_pb2
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import extension_type
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.framework import tensor_util
  from tensorflow.python.framework import test_util
  from tensorflow.python.framework import type_spec
  from tensorflow.python.framework import type_spec_registry
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.platform import test
  from tensorflow.python.saved_model import nested_structure_coder
  from tensorflow.python.types import internal
label_desc: Use image node_id 23 for calling the NestedStructureCoderTest obj's underlying member method code with example usage: obj.testRegisteredTypeSpec() without return types