code: def test_whether_changed(self):
      # test whether the sample changed or not
      trans = nli_length.transform(sample1)
      self.assertTrue(
          sample1.hypothesis.field_value
          != trans[0].hypothesis.field_value
          or sample1.premise.field_value != trans[0].premise.field_value
      )
  
file_path: textflint/test/generation/transformation/NLI/test_add_sent.py
imports: import unittest
  from textflint.input.component.sample.nli_sample import NLISample
  from textflint.generation.transformation.NLI import AddSent
label_desc: Use image node_id 1 for calling the TestNliLength obj's underlying member method code with example usage: obj.test_whether_changed() without return types