code: def get_cfg(cls, key=None):
      if key is None:
          # Use Transformer WMT EN-DE Base
          return transformer_base()
      else:
          return transformer_cfg_reg.create(key)
  
imports: import numpy
  import mxnet
  from mxnet import np, npx
  from mxnet import use_np
  from mxnet.gluon import nn, HybridBlock
  from typing import Optional, Tuple, List
  from ..utils.registry import Registry
  from ..attention_cell import MultiHeadAttentionCell, gen_self_attn_mask, gen_mem_attn_mask
  from ..layers import PositionalEmbedding, PositionwiseFFN, InitializerType
  from ..utils.config import CfgNode
  from ..sequence_sampler import BaseStepDecoder
label_desc: Use image node_id 8 for calling the TransformerModel obj's underlying member method code with example usage: obj.get_cfg(cls, key) and returns: transformer_base, transformer_cfg_reg