code: def supports_device(cls, device: str) -> bool:
      return device == "CPU"
  
file_path: tinygrad/test/external/external_test_onnx_backend.py
imports: import unittest
  from typing import Any, Tuple
  from onnx.backend.base import Backend, BackendRep
  import onnx.backend.test
  import numpy
  from tinygrad.tensor import Tensor
  from tinygrad.helpers import getenv, CI
  from tinygrad.device import Device, Compiled
  from extra.onnx import get_run_onnx
label_desc: Use image node_id 2 for calling the TinygradBackend obj's underlying member method code with example usage: obj.supports_device(cls, device) and returns: unknown