code: def getInstrumentTraits(self, instrument):
      return common.BTCTraits()
  
file_path: pyalgotrade/pyalgotrade/bitstamp/broker.py
imports: from pyalgotrade import broker
  from pyalgotrade.broker import backtesting
  from pyalgotrade.bitstamp import common
  from pyalgotrade.bitstamp import livebroker
label_desc: Use image node_id 2 for calling the BacktestingBroker obj's underlying member method code with example usage: obj.getInstrumentTraits(instrument) and returns: common