code: def test_smoke(self, device, dtype) -> None:
      C, H, W = 1, 4, 6
      img = torch.rand(C, H, W, device=device, dtype=dtype)
      assert isinstance(
          kornia.color.raw_to_rgb_2x2_downscaled(
              img, kornia.color.CFA.BG
          ),
          torch.Tensor,
      )
  
imports: import warnings
  import pytest
  import torch
  from packaging import version
  from torch.autograd import gradcheck
  import kornia
  from kornia.testing import BaseTester, assert_close
label_desc: Use image node_id 1 for calling the TestRawToRgb2x2Downscaled obj's underlying member method code with example usage: obj.test_smoke(device, dtype) without return types