code: def add_args(parser):
      HybridTransformerRNNModel.add_args(parser)
      multilingual_model.MultilingualModel.add_args(parser)
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  from fairseq import utils
  from fairseq.models import FairseqEncoderDecoderModel, FairseqIncrementalDecoder, register_model, register_model_architecture, transformer
  from fairseq.modules import MultiheadAttention
  from pytorch_translate import multilingual_model, transformer, vocab_reduction
  from pytorch_translate.utils import torch_find
label_desc: Use image node_id 1 for calling the MultilingualHybridTransformerModel obj's underlying member method code with example usage: obj.add_args(parser) without return types