code: def get_critic(hidden_dim: int) -> keras.layers.Layer:
      """
      Constructs the critic network.
  
      Parameters
      ----------
      hidden_dim:
          Critic's hidden dimension.
  
      Returns
      -------
      Critic network.
      """
      return Critic(hidden_dim=hidden_dim)
  
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 3 for calling a global function with example usage: get_critic(hidden_dim) and returns: Critic