code: def test_ebsw_ext(self):
      self.data.ta.ebsw(append=True)
      self.assertIsInstance(self.data, DataFrame)
      self.assertEqual(self.data.columns[-1], "EBSW_40_10")
  
file_path: pandas-ta/tests/test_ext_indicator_cycles.py
imports: from pandas.core.series import Series
  from .config import sample_data
  from .context import pandas_ta
  from unittest import TestCase
  from pandas import DataFrame
label_desc: Use image node_id 5 for calling the TestCylesExtension obj's underlying member method code with example usage: obj.test_ebsw_ext() without return types