code: def test_mask(self):
      absa_sample = ABSASample(data)
      # test does the mask label work
      new = absa_sample.insert_field_after_index("sentence", 0, "abc")
      new = new.delete_field_at_index("sentence", 1)
      # TODO wait repair bug
      print(new.dump())
      print(new.get_mask("sentence"))
  
file_path: textflint/test/input/component/sample/test_absa_sample.py
imports: import unittest
  from textflint.input.component.sample.absa_sample import *
label_desc: Use image node_id 6 for calling the TestABSASample obj's underlying member method code with example usage: obj.test_mask() without return types