code: def stop(self):
      print("==================================================")
      print("Starting Value - %.2f" % self.broker.startingcash)
      print("Ending   Value - %.2f" % self.broker.getvalue())
      print("==================================================")
  
file_path: backtrader/contrib/samples/pair-trading/pair-trading.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import argparse
  import datetime
  import backtrader
  import backtrader.feeds
  import backtrader.indicators
label_desc: Use image node_id 5 for calling the PairTradingStrategy obj's underlying member method code with example usage: obj.stop() without return types