code: def __init__(self, cent_obs_dim):
      super(Critic, self).__init__()
      self.ln1 = nn.LayerNorm(cent_obs_dim)
      self.ln2 = nn.LayerNorm(64)
      self.ln3 = nn.LayerNorm(64)
      self.fc1 = nn.Linear(cent_obs_dim, 64)
      self.fc2 = nn.Linear(64, 64)
      self.v_out = nn.Linear(64, 1)
  
file_path: PARL/benchmark/torch/mappo/simple_model.py
imports: import parl
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 1 to create a new Critic object from inherited base classes: parl with example: obj = Critic(cent_obs_dim)