code: def test_cum_log_return(self):
      result = pandas_ta.log_return(self.close, cumulative=True)
      self.assertIsInstance(result, Series)
      self.assertEqual(result.name, "CUMLOGRET_1")
  
file_path: pandas-ta/tests/test_indicator_performance.py
imports: from .config import sample_data
  from .context import pandas_ta
  from unittest import TestCase
  from pandas import Series
label_desc: Use image node_id 6 for calling the TestPerformace obj's underlying member method code with example usage: obj.test_cum_log_return() without return types