code: def test_dynamo(self, device, dtype, torch_optimizer):
      # TODO: investigate the problem with dynamo
      B, C, H, W = 2, 3, 4, 4
      img = torch.ones(B, C, H, W, device=device, dtype=dtype)
      op = kornia.color.rgb_to_grayscale
      op_optimized = torch_optimizer(op)
      assert_close(op(img), op_optimized(img))
  
imports: import pytest
  import torch
  from torch.autograd import gradcheck
  import kornia
  from kornia.testing import BaseTester, assert_close
  from kornia.utils._compat import torch_version
label_desc: Use image node_id 6 for calling the TestBgrToGrayscale obj's underlying member method code with example usage: obj.test_dynamo(device, dtype, torch_optimizer) without return types