code: def getGrouped(self):
      return self.__aggfun(self.__values)
  
imports: import abc
  import six
  from pyalgotrade import dataseries
  from pyalgotrade.dataseries import bards
  from pyalgotrade import bar
  from pyalgotrade import resamplebase
label_desc: Use image node_id 3 for calling the AggFunGrouper obj's underlying member method code with example usage: obj.getGrouped() and returns: self