code: def empty(self):
      return self.obj.empty
  
imports: import sys
  from collections.abc import Iterable
  import cloudpickle
  import numpy
  from pandas.core.groupby import DataFrameGroupBy, SeriesGroupBy
  from ..utils import estimate_pandas_size, pd_release_version, no_default
label_desc: Use image node_id 9 for calling the GroupByWrapper obj's underlying member method code with example usage: obj.empty() and returns: self