code: def __loadIntradayBarFeed(self, timeZone=None):
      ret = ninjatraderfeed.Feed(
          ninjatraderfeed.Frequency.MINUTE, timeZone
      )
      ret.addBarsFromCSV(
          "spy", common.get_data_file_path("nt-spy-minute-2011.csv")
      )
      ret.loadAll()
      return ret
  
file_path: pyalgotrade/testcases/ninjatraderfeed_test.py
imports: import datetime
  from .None import common
  from .None import barfeed_test
  from .None import feed_test
  from pyalgotrade.barfeed import ninjatraderfeed
  from pyalgotrade import marketsession
  from pyalgotrade import bar
  from pyalgotrade.utils import dt
label_desc: Use image node_id 1 for calling the NinjaTraderTestCase obj's underlying member method code with example usage: obj.__loadIntradayBarFeed(timeZone) and returns: ret