code: def test_serialization(dtype):
      tlu = TLU(
          affine=True,
          alpha_initializer="ones",
          tau_initializer="ones",
          dtype=dtype,
      )
      serialized_tlu = tf.keras.layers.serialize(tlu)
      new_layer = tf.keras.layers.deserialize(serialized_tlu)
      assert tlu.get_config() == new_layer.get_config()
  
file_path: addons/tensorflow_addons/layers/tests/tlu_test.py
imports: import pytest
  import numpy
  import tensorflow
  from tensorflow_addons.layers.tlu import TLU
  from tensorflow_addons.utils import test_utils
label_desc: Use image node_id 3 for calling a global function with example usage: test_serialization(dtype) without return types