code: def test_callable_arg(self):
      t = ThingWithCallableArg(1.0, lambda x: x + 2.0)
      self.assertIsInstance(t, tf.__internal__.CompositeTensor)
  
      ts = t._type_spec
      components = ts._to_components(t)
      self.assertAllEqualNested(components, dict(a=1.0))
  
      t2 = ts._from_components(components)
      self.assertIsInstance(t2, ThingWithCallableArg)
  
      self.assertAllClose(tf.function(lambda t: t.call())(t2), 3.0)
  
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 15 for calling the AutoCompositeTensorTest obj's underlying member method code with example usage: obj.test_callable_arg() without return types