docstr: Test no preprocessing
code: def test_inverse_transform_none(self):
      """
      Test no preprocessing
      """
      contributions = pd.DataFrame(np.random.rand(10, 15))
      preprocessing = None
      original = inverse_transform_contributions(
          contributions, preprocessing
      )
      pd.testing.assert_frame_equal(original, contributions)
  
file_path: shapash/tests/unit_tests/decomposition/test_inverse_contribution.py
imports: import unittest
  import pandas
  import numpy
  import category_encoders
  import sklearn.preprocessing
  from sklearn.compose import ColumnTransformer
  from shapash.decomposition.contributions import inverse_transform_contributions
label_desc: Use image node_id 1 for calling the TestInverseContribCaterogyEncoder obj's underlying member method code with example usage: obj.test_inverse_transform_none() without return types