code: def test_delete_field_at_index(self):
      absa_sample = ABSASample(data)
      # test insert before index and mask
      del_sample = absa_sample.delete_field_at_index("sentence", [1, 3])
      self.assertEqual(
          ["The", "top", "notch", "as", "well", "."],
          del_sample.get_value("sentence"),
      )
      self.assertEqual(
          [0, 0, 0, 0, 0, 0], del_sample.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 4 for calling the TestABSASample obj's underlying member method code with example usage: obj.test_delete_field_at_index() without return types