code: def __createPositionStrategy(self):
      barFeed = self.__loadBarFeed()
      return position_test.TestStrategy(
          barFeed, TradesAnalyzerTestCase.TestInstrument, 1000
      )
  
imports: import datetime
  import math
  from distutils import version
  import pytz
  import numpy
  from .None import common
  from .None import strategy_test
  from .None import position_test
  from pyalgotrade.barfeed import ninjatraderfeed
  from pyalgotrade.barfeed import csvfeed
  from pyalgotrade.stratanalyzer import trades
  from pyalgotrade import broker
  from pyalgotrade.broker import backtesting
label_desc: Use image node_id 3 for calling the TradesAnalyzerTestCase obj's underlying member method code with example usage: obj.__createPositionStrategy() and returns: position_test