code: def test_get_replacement_words(self):
      self.assertTrue([] == swap_ins._get_replacement_words(""))
  
      for i in range(10):
          self.assertTrue(
              editdistance.eval(
                  "qwertyuiop",
                  swap_ins._get_replacement_words("qwertyuiop")[0],
              )
              <= 2
          )
  
file_path: textflint/test/generation/transformation/NER/test_ent_typos.py
imports: import unittest
  import editdistance
  from textflint.input.component.sample.ner_sample import NERSample
  from textflint.generation.transformation.NER.ent_typos import EntTypos
  from textflint.common.utils.word_op import *
label_desc: Use image node_id 3 for calling the TestSpecialEntityTyposSwap obj's underlying member method code with example usage: obj.test_get_replacement_words() without return types