code: def test_rolling_std(self):
      self._test_rolling_func("std")
  
file_path: spark/python/pyspark/pandas/tests/window/test_rolling_adv.py
imports: from pyspark.testing.pandasutils import PandasOnSparkTestCase, TestUtils
  from pyspark.pandas.tests.window.test_rolling import RollingTestingFuncMixin
label_desc: Use image node_id 2 for calling the RollingAdvMixin obj's underlying member method code with example usage: obj.test_rolling_std() without return types