code: def test_ui_ext(self):
      self.data.ta.ui(append=True)
      self.assertIsInstance(self.data, DataFrame)
      self.assertEqual(self.data.columns[-1], "UI_14")
  
      self.data.ta.ui(append=True, everget=True)
      self.assertIsInstance(self.data, DataFrame)
      self.assertEqual(self.data.columns[-1], "UIe_14")
  
imports: from .config import sample_data
  from .context import pandas_ta
  from unittest import TestCase
  from pandas import DataFrame
label_desc: Use image node_id 19 for calling the TestVolatilityExtension obj's underlying member method code with example usage: obj.test_ui_ext() without return types