code: def testOk(self):
      self.__testImpl()
  
imports: import datetime
  import os
  from .None import common
  from pyalgotrade.barfeed import ninjatraderfeed
  from pyalgotrade.barfeed import yahoofeed
  from pyalgotrade.barfeed import csvfeed
  from pyalgotrade.tools import resample
  from pyalgotrade import marketsession
  from pyalgotrade.utils import dt
  from pyalgotrade.dataseries import resampled
  from pyalgotrade.barfeed import resampled
  from pyalgotrade.dataseries import bards
  from pyalgotrade import bar
  from pyalgotrade import dispatcher
  from pyalgotrade import resamplebase
label_desc: Use image node_id 2 for calling the DayRange obj's underlying member method code with example usage: obj.testOk() without return types