code: def buildGrouper(self, range_, value, frequency):
      raise NotImplementedError()
  
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 2 for calling the DSResampler obj's underlying member method code with example usage: obj.buildGrouper(range_, value, frequency) without return types