code: def attr_1(self) -> int:
      return 1
  
imports: import pytest
  import torch
  from deepspeed.inference.v2.allocator import on_device
  from deepspeed.inference.v2.inference_parameter import InferenceParameter
  from deepspeed.inference.v2.model_implementations.parameter_base import ParameterBase, ParamList
  from deepspeed.inference.v2.model_implementations.layer_container_base import LayerContainer
  from deepspeed.inference.v2.model_implementations.common_parameters import *
  from .utils import validate_device
label_desc: Use image node_id 1 for calling the MixedInferenceModel obj's underlying member method code with example usage: obj.attr_1() and returns: int