code: def test_fallback(self) -> None:
      with patch.dict(input_transform_argparse.funcs, {}):
  
          @input_transform_argparse.register(InputTransform)
          def _argparse(input_transform_class: InputTransform) -> None:
              pass
  
          self.assertEqual(
              input_transform_argparse[InputTransform], _argparse
          )
  
imports: from __future__ import annotations
  from unittest.mock import patch
  import numpy
  import torch
  from ax.core.search_space import RobustSearchSpaceDigest, SearchSpaceDigest
  from ax.models.torch.botorch_modular.input_constructors.input_transforms import input_transform_argparse
  from ax.utils.common.testutils import TestCase
  from botorch.models.transforms.input import InputPerturbation, InputStandardize, InputTransform, Normalize, Warp
  from botorch.utils.datasets import MultiTaskDataset, SupervisedDataset
label_desc: Use image node_id 4 for calling the InputTransformArgparseTest obj's underlying member method code with example usage: obj.test_fallback() without return types