code: def test_onnx(self, device, dtype, tmp_path: Path):
      model: vit.EfficientViTBackbone = vit.efficientvit_backbone_b0()
      model = model.to(device=device, dtype=dtype)
  
      image = torch.randn(1, 3, 224, 224, device=device, dtype=dtype)
  
      model_path = tmp_path / "efficientvit_backbone_b0.onnx"
  
      torch.onnx.export(model, image, model_path, opset_version=16)
  
      assert model_path.is_file()
  
file_path: kornia/test/contrib/models/test_efficient_vit.py
imports: from pathlib import Path
  import pytest
  import torch
  from kornia.contrib.models.efficient_vit import EfficientViT, EfficientViTConfig
  from kornia.contrib.models.efficient_vit import backbone
  from kornia.utils._compat import torch_version_lt
label_desc: Use image node_id 4 for calling the TestEfficientViT obj's underlying member method code with example usage: obj.test_onnx(device, dtype, tmp_path) without return types