code: def _success(self, task):
      self._success_events.append(self._task_to_str(task))
  
file_path: gokart/gokart/slack/event_aggregator.py
imports: import os
  from logging import getLogger
  from typing import List, TypedDict
  import luigi
label_desc: Use image node_id 5 for calling the EventAggregator obj's underlying member method code with example usage: obj._success(task) without return types