docstr: Unused `value_type` to allow the `TypeSpec` to be instantiated.
docstr_tok: ["Unused","`","value_type","`","to","allow","the","`","TypeSpec","`","to","be","instantiated","."]
code: def value_type(self):
      """Unused `value_type` to allow the `TypeSpec` to be instantiated."""
      pass
  
imports: import functools
  import os
  from absl import flags
  from absl.testing import parameterized
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import bijector
  from tensorflow_probability.python.bijectors import reshape
  from tensorflow_probability.python.bijectors import scale
  from tensorflow_probability.python.bijectors import shift
  from tensorflow_probability.python.bijectors import transform_diagonal
  from tensorflow_probability.python.distributions import independent
  from tensorflow_probability.python.distributions import normal
  from tensorflow_probability.python.distributions import transformed_distribution
  from tensorflow_probability.python.experimental.distributions import mvn_precision_factor_linop
  from tensorflow_probability.python.internal import auto_composite_tensor
  from tensorflow_probability.python.internal import tensor_util
  from tensorflow_probability.python.internal import test_util
  from absl.testing import absltest
label_desc: Use image node_id 2 for calling the _TestTypeSpec obj's underlying member method code with example usage: obj.value_type() without return types