code: def __search_record(self, task_group_id):
  		
  		for i in range(len(self.__records)):
  			record = self.__records[i]
  			if record.task_group_id() == task_group_id:
  				yield record, i
docs: Search (iterate over) for tasks with the given task id
  
  		:param task_group_id: target id
  
  		:return: None