code: def save_model(
      path: Union[str, os.PathLike], model: keras.layers.Layer
  ) -> None:
      """
      Saves a model and its optimizer.
  
      Parameters
      ----------
      path
          Path to the saving location.
      model
          Model to be saved.
      """
      model.save(path, save_format="tf")
  
imports: import os
  import random
  from typing import Any, List, Dict, Callable, Union, Optional, TYPE_CHECKING
  import numpy
  import tensorflow
  import tensorflow.keras
  from alibi.explainers.backends.cfrl_base import CounterfactualRLDataset
  from alibi.models.tensorflow.actor_critic import Actor, Critic
label_desc: Use image node_id 17 for calling a global function with example usage: save_model(path, model) without return types