code: def getBollingerBands(self):
      return self.__bbands
  
file_path: pyalgotrade/samples/bbands.py
imports: from __future__ import print_function
  from pyalgotrade import strategy
  from pyalgotrade import plotter
  from pyalgotrade.tools import quandl
  from pyalgotrade.technical import bollinger
  from pyalgotrade.stratanalyzer import sharpe
  from pyalgotrade import broker
label_desc: Use image node_id 2 for calling the BBands obj's underlying member method code with example usage: obj.getBollingerBands() and returns: self