code: def create(
      layer_name: str, gsm_mode: str = "baseline", **kwargs
  ) -> Optional[Layer]:
      if gsm_mode not in ("baseline", "hooks", "ew", "functorch"):
          raise ValueError(f"Unexpected grad_sample_mode={gsm_mode}")
  
      if layer_name == LayerType.LINEAR:
          module = LinearBase(**kwargs)
      elif layer_name == LayerType.CONV:
          module = ConvBase(**kwargs)
      elif layer_name == LayerType.LAYERNORM:
          module = LayerNormBase(**kwargs)
      elif layer_name == LayerType.INSTANCENORM:
          module = InstanceNormBase(**kwargs)
      elif layer_name == LayerType.GROUPNORM:
          module = GroupNormBase(**kwargs)
      elif layer_name == LayerType.EMBEDDING:
          module = EmbeddingBase(**kwargs)
      elif layer_name == LayerType.RNN:
          module = RNNBase(layer=nn.RNN, **kwargs)
      elif layer_name == LayerType.DPRNN:
          module = RNNBase(layer=DPRNN, **kwargs)
      elif layer_name == LayerType.GRU:
          module = RNNBase(layer=nn.GRU, **kwargs)
      elif layer_name == LayerType.DPGRU:
          module = RNNBase(layer=DPGRU, **kwargs)
      elif layer_name == LayerType.LSTM:
          module = LSTMBase(layer=nn.LSTM, **kwargs)
      elif layer_name == LayerType.DPLSTM:
          module = LSTMBase(layer=DPLSTM, **kwargs)
      elif layer_name == LayerType.MHA:
          module = MHABase(layer=nn.MultiheadAttention, **kwargs)
      elif layer_name == LayerType.DPMHA:
          module = MHABase(layer=DPMultiheadAttention, **kwargs)
      else:
          raise Exception(f"Invalid layer type: {layer_name}.")
  
      if gsm_mode != "baseline":
          module.make_private(gsm_mode=gsm_mode)
  
      return module
  
imports: from enum import Enum
  from typing import Callable, Dict, Optional, Tuple, Type, Union
  import torch
  import torch.nn
  import torch.nn.functional
  from opacus.grad_sample import GradSampleModule
  from opacus.grad_sample.utils import wrap_model
  from opacus.layers import DPGRU, DPLSTM, DPRNN, DPMultiheadAttention
  from opacus.layers.dp_rnn import DPRNNBase
label_desc: Use image node_id 1 for calling the LayerFactory obj's underlying member method code with example usage: obj.create(layer_name, gsm_mode) and returns: module