code: def load_external_data_for_model(model, base_dir):  # type: (ModelProto, Text) -> None
      
      for tensor in _get_all_tensors(model):
          if uses_external_data(tensor):
              load_external_data_for_tensor(tensor, base_dir)
docs: Loads external tensors into model
  
      @params
      model: ModelProto to load external data to
      base_dir: directory that contains external data