code: def result_columns(self):
      return self.index
  
imports: import warnings
  import numpy
  from pandas._libs import reduction
  import pandas.compat
  from pandas.util._decorators import cache_readonly
  from pandas.core.dtypes.common import is_dict_like, is_extension_type, is_list_like, is_sequence
  from pandas.core.dtypes.generic import ABCSeries
  from pandas.io.formats.printing import pprint_thing
label_desc: Use image node_id 4 for calling the FrameRowApply obj's underlying member method code with example usage: obj.result_columns() and returns: self