code: def test_groupby_expanding_max(self):
      self._test_groupby_expanding_func("max")
  
file_path: spark/python/pyspark/pandas/tests/diff_frames_ops/test_groupby_expanding.py
imports: import pandas
  from pyspark import pandas
  from pyspark.pandas.config import set_option, reset_option
  from pyspark.testing.pandasutils import PandasOnSparkTestCase
  from pyspark.testing.sqlutils import SQLTestUtils
label_desc: Use image node_id 4 for calling the GroupByExpandingMixin obj's underlying member method code with example usage: obj.test_groupby_expanding_max() without return types