code: def test_IdentityTransform(self) -> None:
      # Test that the identity transform does not mutate anything
      t = Transform(MagicMock(), MagicMock())
      x = MagicMock()
      ys = []
      ys.append(t.transform_search_space(x))
      ys.append(t.transform_optimization_config(x, x, x))
      ys.append(t.transform_observation_features(x))
      ys.append(t._transform_observation_data(x))
      ys.append(t.untransform_observation_features(x))
      ys.append(t._untransform_observation_data(x))
      self.assertEqual(len(x.mock_calls), 0)
      for y in ys:
          self.assertEqual(y, x)
  
file_path: Ax/ax/modelbridge/transforms/tests/test_base_transform.py
imports: from copy import deepcopy
  from unittest.mock import MagicMock
  import numpy
  from ax.core.observation import Observation, ObservationData, ObservationFeatures
  from ax.modelbridge.transforms.base import Transform
  from ax.utils.common.testutils import TestCase
label_desc: Use image node_id 1 for calling the TransformsTest obj's underlying member method code with example usage: obj.test_IdentityTransform() without return types