code: def build_model(self, args):
      model = models.build_model(args, self)
      if not isinstance(model, FairseqMultiModel):
          raise ValueError(
              "PyTorchTranslateMultiTask requires a FairseqMultiModel architecture"
          )
      return model
  
file_path: translate/pytorch_translate/tasks/pytorch_translate_multi_task.py
imports: from fairseq import models
  from fairseq.data import data_utils, FairseqDataset
  from fairseq.models import FairseqMultiModel
  from fairseq.tasks.multilingual_translation import MultilingualTranslationTask
  from pytorch_translate.data import iterators
label_desc: Use image node_id 1 for calling the PyTorchTranslateMultiTask obj's underlying member method code with example usage: obj.build_model(args) and returns: model