code: def start(self):
      self.counter = 0
  
file_path: backtrader/samples/data-replay/data-replay.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import argparse
  import backtrader
  import backtrader.feeds
  import backtrader.indicators
label_desc: Use image node_id 2 for calling the SMAStrategy obj's underlying member method code with example usage: obj.start() without return types