code: def test_inverse_transform(self):
      it = IndexTransformer()
      x, y = it.fit_transform(self.x, self.y)
      lengths = map(len, self.y)
      inv_y = it.inverse_transform(y, lengths)
      self.assertEqual(inv_y, self.y)
  
imports: import os
  import shutil
  import unittest
  import numpy
  from anago.preprocessing import IndexTransformer, pad_nested_sequences
label_desc: Use image node_id 10 for calling the TestIndexTransformer obj's underlying member method code with example usage: obj.test_inverse_transform() without return types