code: def test_TimeSeriesDifferentiator_inverse_transform(order):
      """
      Test TimeSeriesDifferentiator.inverse_transform method.
      """
      transformer = TimeSeriesDifferentiator(order=order)
      y_diff = transformer.fit_transform(y)
      results = transformer.inverse_transform(y_diff)
  
      np.testing.assert_array_equal(results, y)
  
imports: import re
  import pytest
  import numpy
  from skforecast.preprocessing import TimeSeriesDifferentiator
label_desc: Use image node_id 1 for calling a global function with example usage: test_TimeSeriesDifferentiator_inverse_transform(order) without return types