code: def supports_device(cls, device: str) -> bool:
      d = Device(device)
      return d.type == DeviceType.CPU
  
imports: import os
  import platform
  import sys
  import unittest
  from typing import Any
  import numpy
  import version_utils
  import onnx.backend.base
  import onnx.backend.test
  import onnx.shape_inference
  import onnx.version_converter
  from onnx import ModelProto
  from onnx.backend.base import Device, DeviceType
  from onnx.reference import ReferenceEvaluator
label_desc: Use image node_id 2 for calling the ReferenceEvaluatorBackend obj's underlying member method code with example usage: obj.supports_device(cls, device) and returns: unknown