code: def add(self, sub: BaseNotifier):
      self._notifiers.append(sub)
  
file_path: aim/aim/ext/notifier/notifier.py
imports: import logging
  import time
  from typing import List, Optional
  from aim.ext.notifier.base_notifier import BaseNotifier
label_desc: Use image node_id 2 for calling the Notifier obj's underlying member method code with example usage: obj.add(sub) without return types