code: def testDtypeMismatch(self):
      signature_context = trace_type.InternalTracingContext()
      type_1 = tensor.TensorSpec(
          tensor_shape.TensorShape([1, 2, 3]), dtypes.float32, None
      ).__tf_tracing_type__(signature_context)
      type_2 = tensor.TensorSpec(
          tensor_shape.TensorShape([1, 2, 3]), dtypes.int32, None
      ).__tf_tracing_type__(signature_context)
      self.assertNotEqual(type_1, type_2)
      self.assertFalse(type_2.is_subtype_of(type_1))
      self.assertFalse(type_1.is_subtype_of(type_2))
  
imports: import pickle
  from absl.testing import parameterized
  import numpy
  from tensorflow.core.framework import full_type_pb2
  from tensorflow.core.function import trace_type
  from tensorflow.python.eager import context
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.framework import test_util
  from tensorflow.python.framework import type_spec
  from tensorflow.python.framework.type_utils import fulltypes_for_flat_tensors
  from tensorflow.python.ops import array_ops
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 16 for calling the TensorSpecTest obj's underlying member method code with example usage: obj.testDtypeMismatch() without return types