code: def test_cksp_ext(self):
      self.data.ta.cksp(tvmode=False, append=True)
      self.assertIsInstance(self.data, DataFrame)
      self.assertEqual(
          list(self.data.columns[-2:]),
          ["CKSPl_10_3_20", "CKSPs_10_3_20"],
      )
  
imports: from .config import sample_data
  from .context import pandas_ta
  from unittest import skip, TestCase
  from pandas import DataFrame
label_desc: Use image node_id 9 for calling the TestTrendExtension obj's underlying member method code with example usage: obj.test_cksp_ext() without return types