code: def notify_order(self, order):
      if order.status in [
          order.Completed,
          order.Cancelled,
          order.Rejected,
      ]:
          self.order = None
  
      print("-" * 50, "ORDER BEGIN", datetime.datetime.now())
      print(order)
      print("-" * 50, "ORDER END")
  
file_path: backtrader/samples/ibtest/ibtest.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import argparse
  import datetime
  import backtrader
  from backtrader.utils import flushfile
label_desc: Use image node_id 4 for calling the TestStrategy obj's underlying member method code with example usage: obj.notify_order(order) without return types