code: def setStopAfter(self, minutes):
      self.deadline = datetime.datetime.now() + datetime.timedelta(
          minutes=minutes
      )
  
imports: import datetime
  from pyalgotrade import strategy
label_desc: Use image node_id 2 for calling the TestStrategyMixin obj's underlying member method code with example usage: obj.setStopAfter(minutes) without return types