code: def test_whether_changed(self):
      # test whether the sample changed or not
      trans = wsc_antonymswap.transform(sample1)
      if trans != []:
          self.assertTrue(sample1.text.text != trans[0].text.text)
  
imports: import unittest
  from textflint.input.component.sample.wsc_sample import WSCSample
  from textflint.generation.transformation.WSC import InsertRelativeClause
label_desc: Use image node_id 1 for calling the TestNliSwapAnt obj's underlying member method code with example usage: obj.test_whether_changed() without return types